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Update blufi.rst
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Jin Fang Cheng Cheng
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aff4696cc4
@ -7,7 +7,7 @@ The BluFi for ESP32 is a Wi-Fi network configuration function via Bluetooth chan
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Fragmenting, data encryption, checksum verification in the BluFi layer are the key elements of this process.
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You can customize symmetric encryption, asymmetric encryption and checksum support custmization on your demand in practical use. Here we use the DH algorithm for key negotiation, 128-AES algorithm for data encryption, and CRC16 algorithm for checksum verification.
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You can customize symmetric encryption, asymmetric encryption and checksum support customization. Here we use the DH algorithm for key negotiation, 128-AES algorithm for data encryption, and CRC16 algorithm for checksum verification.
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The BluFi Flow
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---------------
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@ -17,7 +17,7 @@ The following uses Station as an example to illustrate the core parts of the pro
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1. Set the ESP32 into GATT Server mode and then it will send broadcasts with specific *advertising data*. You can customize this broadcast as needed, which is not a part of the BluFi Profile.
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2. Use the APP installed on the mobile phone to search for this particular broadcast. The mobile phone will connect to ESP32 as the GATT Client once the broadcast is confirmed. The APP used during this part is up to you.
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2. Use the App installed on the mobile phone to search for this particular broadcast. The mobile phone will connect to ESP32 as the GATT Client once the broadcast is confirmed. The App used during this part is up to you.
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3. After the GATT connection is successfully established, the mobile phone will send a data frame for key negotiation to ESP32 (see the section :ref:`frame_formats` for details).
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@ -73,13 +73,13 @@ The flow chat of BluFi
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The Frame Formats Defined in BluFi
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-----------------------------------
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The frame formats for the communication between the mobile phone APP and ESP32 are defined as follows:
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The frame formats for the communication between the mobile phone App and ESP32 are defined as follows:
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The frame format with no fragment (8 bit)：
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+------------+---------------+-----------------+-------------+----------------+----------------+
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| LSB - Type | Frame Control | Sequence Number | Data Length | Data | MSB - CheckSum |
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+------------+---------------+-----------------+-------------+----------------+----------------+
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+============+===============+=================+=============+================+================+
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| 1 | 1 | 1 | 1 | ${Data Length} | 2 |
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+------------+---------------+-----------------+-------------+----------------+----------------+
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@ -91,7 +91,7 @@ The frame format with fragments（8 bit）：
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| LSB - Type | FrameControl(Frag) | SequenceNumber | DataLength | Data | MSB - CheckSum |
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+ + + + +----------------------+--------------------+ +
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| | | | | Total Content Length | Content | |
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+------------+--------------------+----------------+------------+----------------------+--------------------+----------------+
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+============+====================+================+============+======================+====================+================+
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| 1 | 1 | 1 | 1 | 2 | ${Data Length} - 2 | 2 |
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+------------+--------------------+----------------+------------+----------------------+--------------------+----------------+
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@ -103,13 +103,13 @@ The format of Ack Frame（8 bit）：
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| LSB - Type (Ack) | Frame Control | SequenceNumber | Data Length | Data | MSB - CheckSum |
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+ + + + +-----------------------+ +
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| | | | | Acked Sequence Number | |
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+------------------+----------------+------------------+--------------+-----------------------+----------------+
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+==================+================+==================+==============+=======================+================+
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| 1 | 1 | 1 | 1 | 1 | 2 |
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+------------------+----------------+------------------+--------------+-----------------------+----------------+
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1. Type
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The **Type** field, taking 1 Byte, is divided into **Type** and **Subtype**, that Type uses the lower 2 bit and **Subtype** uses the upper 6 bit.
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The **Type** field, taking 1 byte, is divided into **Type** and **Subtype**, that Type uses the lower 2 bits and **Subtype** uses the upper 6 bits.
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* The control frame is not encrypted for the time being and supports to be verified;
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@ -117,79 +117,233 @@ The format of Ack Frame（8 bit）：
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**1.1 Control Frame (0x0b’00)**
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Control Frame | Implication | Explanation | Note |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x0b’000000 | Ack | The data field of the Ack frame uses the same sequence value of the frame to reply to. | The data field consumes a byte and its value is the same as the sequence field of the frame to reply to. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x1b’000001 | Set ESP32 to the security mode. | To inform ESP32 of the security mode to use when sending data, which is allowed to be reset multiple times during the process.Each setting affects the subsequent security mode used.If it is not set, ESP32 will send the control frame and data frame with no checksum and encryption by default.The data transmission from the mobile phone to ESP32 is controlled by this control frame. | The data field consumes a byte.The higher 4 bits are for the security mode setting of the control frame, and the lower 4 bits are for the security mode setting of the data frame.b’0000: no checksum and no encryption;b’0001: with checksum but no encryption;b’0010: no checksum but with encryption;b’0011: with both checksum and encryption. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x2b’000010 | Set the opmode of Wi-Fi. | The frame contains opmode settings for configuring for the Wi-Fi mode of ESP32. | data[0] is for opmode settings, including:0x00: NULL；0x01: STA;0x02: SoftAP;0x03: SoftAP&STA.Please set the SSID/Password/Max Connection Number of the AP mode in the first place if an AP gets involved . |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x3b’000011 | Connect ESP32 to the AP. | To notify ESP32 that the essential information has been sent and it is allowed to connect to the AP. | No data field is contained. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x4b’000100 | Disconnect ESP32 from the AP. | | No data field is contained. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x5b’000101 | To get the information of ESP32’s Wi-Fi mode and its status. | | No data field is contained.When receiving this control frame, ESP32 will send back a follow-up frame of Wi-Fi connection state report to the mobile phone with the information of the current opmode, connection status, SSID and so on. The types of information sent to the mobile phone is defined by the application installed on the phone. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x6b’000110 | Disconnect the STA device from the SoftAP (in SoftAP mode). | | Date[0~5] is taken as the MAC address for the STA device. If there is a second STA device, then it uses data[6-11] and the rest can be done in the same manner. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x7b'000111 | Get the version information. | | |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x8b’001000 | Disconnect the BLE GATT link. | | ESP32 will disconnect the BLE GATT link after receives this command. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x9b’001001 | Get the Wi-Fi list. | To get ESP32 to scan the Wi-Fi access points around. | No data field is contained.When receiving this control frame, ESP32 will send back a follow-up frame of Wi-Fi list report to the mobile phone. |
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+---------------+--------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| Control Frame / 0x0b’00 | Implication | Explanation | Note |
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+=========================+==============================================================+===============================================================+===============================================================+
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| 0x0b’000000 | Ack | The data field of the Ack frame uses the same | The data field consumes a byte and its value is |
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| | | sequence value of the frame to reply to. | the same as the sequence field of the frame to reply to. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x1b’000001 | Set ESP32 to the security mode. | To inform ESP32 of the security mode to use | The data field consumes a byte. |
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| | | when sending data, which is allowed to be reset | The higher 4 bits are for the security mode setting |
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| | | multiple times during the process. | of the control frame, and the lower 4 bits are for |
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| | | Each setting affects the subsequent security mode used. | the security mode setting of the data frame. |
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+ + + If it is not set, ESP32 will send the control frame +---------------------------------------------------------------+
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| | | and data frame with no checksum and encryption by default. | b’0000: no checksum and no encryption; |
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+ + + The data transmission from the mobile phone to ESP32 is +---------------------------------------------------------------+
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| | | controlled by this control frame. | b’0001: with checksum but no encryption; |
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+ + + +---------------------------------------------------------------+
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| | | | b’0010: no checksum but with encryption; |
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+ + + +---------------------------------------------------------------+
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| | | | b’0011: with both checksum and encryption. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x2b’000010 | Set the opmode of Wi-Fi. | The frame contains opmode settings for | data[0] is for opmode settings, including: |
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+ + + configuring for the Wi-Fi mode of ESP32. +---------------------------------------------------------------+
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| | | | 0x00: NULL； |
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+ + + +---------------------------------------------------------------+
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| | | | 0x01: STA; |
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+ + + +---------------------------------------------------------------+
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| | | | 0x02: SoftAP; |
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+ + + +---------------------------------------------------------------+
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| | | | 0x03: SoftAP&STA. |
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+ + + +---------------------------------------------------------------+
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| | | | Please set the SSID/Password/Max Connection Number of |
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| | | | the AP mode in the first place if an AP gets involved. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x3b’000011 | Connect ESP32 to the AP. | To notify ESP32 that the essential information has been sent | No data field is contained. |
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| | | and it is allowed to connect to the AP. | |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x4b’000100 | Disconnect ESP32 from the AP. | | No data field is contained. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x5b’000101 | To get the information of ESP32’s Wi-Fi mode and its status. | | No data field is contained. |
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| | | | When receiving this control frame, ESP32 will send back |
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| | | | a follow-up frame of Wi-Fi connection state report to |
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| | | | the mobile phone with the information of the current opmode, |
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| | | | connection status, SSID and so on. |
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| | | | The types of information sent to the mobile phone is |
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| | | | defined by the application installed on the phone. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x6b’000110 | Disconnect the STA device from the SoftAP (in SoftAP mode). | | Date[0~5] is taken as the MAC address for the STA device. |
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| | | | If there is a second STA device, then it uses data[6-11] |
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| | | | and the rest can be done in the same manner. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x7b'000111 | Get the version information. | | |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x8b’001000 | Disconnect the BLE GATT link. | | ESP32 will disconnect the BLE GATT link |
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| | | | after receives this command. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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| 0x9b’001001 | Get the Wi-Fi list. | To get ESP32 to scan the Wi-Fi access points around. | No data field is contained. |
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| | | | When receiving this control frame, |
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| | | | ESP32 will send back a follow-up frame of Wi-Fi list |
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| | | | report to the mobile phone. |
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+-------------------------+--------------------------------------------------------------+---------------------------------------------------------------+---------------------------------------------------------------+
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**1.2 Data Frame (0x1b’01)**
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Data Frame | Implication | Explanation | Note |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x0b’000000 | Send the negotiation data. | The negotiation data will be sent to the callback function registered in the application layer. | The length of the data depends on the length field. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x1b’000001 | Send the BSSID for STA mode. | To send the BSSID of the AP for the STA device to connect under the condition that the SSID is hidden. | The length of the data depends on the length field.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x2b’000010 | Send the SSID for STA mode. | To send the SSID of the AP for the STA device to connect. | The length of the data depends on the length field.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x3b’000011 | Send the password for STA mode. | To send the password of the AP for the STA device to connect. | The length of the data depends on the length field.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x4b’000100 | Send the SSID for SoftAP mode. | | The length of the data depends on the length field.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x5b’000101 | Send the password for SoftAPmode. | | The length of the data depends on the length field.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x6b’000110 | Set the maximum connection number for SoftAP mode. | | data[0] represents the value of the connection number, ranging from 1 to 4.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x7b’000111 | Set the authentication mode for the SoftAP. | | data[0]：0x00: OPEN0x01: WEP0x02: WPA_PSK0x03: WPA2_PSK0x04:WPA_WPA2_PSK。When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x8b’001000 | Set the channel amount for SoftAP mode. | | data[0] represents the quantity of the supported channels, ranging from 1 to 14.When the transmission direction is ESP32 to the mobile phone, it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x9b’001001 | Username | It provides the username of the GATT client when using encryption of enterprise level. | The length of the data depends on the length field. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xab’001010 | CA Certification | It provides the CA Certification when using encryption of enterprise level. | The length of the data depends on the length field. The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xbb’001011 | Client Certification | It provides the client certification when using encryption of enterprise level. Whether the private key is contained or not depends on the content of the certification. | The length of the data depends on the length field. The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xcb’001100 | Server Certification | It provides the sever certification when using encryption of enterprise level. Whether the private key is contained or not depends on the content of the certification. | The length of the data depends on the length field. The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xdb’001101 | ClientPrivate Key | It provides the private key of the client when using encryption of enterprise level. | The length of the data depends on the length field. The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xeb’001110 | ServerPrivate Key | It provides the private key of the sever when using encryption of enterprise level. | The length of the data depends on the length field. The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0xfb’001111 | Wi-Fi Connection State Report | To notify the phone of the ESP32's Wi-Fi status, including STA status and SoftAP status. It is for the STA device to connect to the mobile phone or the SoftAP.However, when the mobile phone receives the Wi-Fi status, it can reply to other frames in addition to this frame. | data[0] represents opmode, including:0x00: NULL；0x01: STA;0x02: SoftAP;0x03: SoftAP&STAdata[1]：the connection state of the STA device, 0x0 indicates a connection state, and others represent a disconnected state;data[2]：the connection state of the SoftAP , that is, how many STA devices have been connected.data[3] and the subsequent is in accordance with the format of SSID/BSSID information. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x10b’010000 | Version | | data[0]= great versiondata[1]= sub version |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x11B’010001 | Wi-Fi List | To send the Wi-Fi list to ESP32. | The format of the data frame is length + RSSI + SSID and it supports to be sent into fragments if the data length is too long. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x12B’010010 | Report Error | To notify the mobile phone that there is an error with BluFi. | 0x00: sequence error0x01: checksum error0x02: decrypt error0x03: encrypt error0x04: init security error0x05: dh malloc error0x06: dh param error0x07: read param error0x08: make public error |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| 0x13B’010011 | Custom Data | To send or receive custom data. | The data frame supports to be sent into fragments if the data length is too long. |
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+--------------+----------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| Data Frame | Implication | Explanation | Note |
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+==============+====================================================+===============================================================+=======================================================================+
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| 0x0b’000000 | Send the negotiation data. | The negotiation data will be sent to the callback | The length of the data depends on the length field. |
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| | | function registered in the application layer. | |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x1b’000001 | Send the BSSID for STA mode. | To send the BSSID of the AP for the STA device to | The length of the data depends on the length field. |
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| | | connect under the condition that the SSID is hidden. | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x2b’000010 | Send the SSID for STA mode. | To send the SSID of the AP for the STA device to connect. | The length of the data depends on the length field. |
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x3b’000011 | Send the password for STA mode. | To send the password of the AP for the STA device to connect. | The length of the data depends on the length field. |
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x4b’000100 | Send the SSID for SoftAP mode. | | The length of the data depends on the length field. |
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x5b’000101 | Send the password for SoftAPmode. | | The length of the data depends on the length field. |
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x6b’000110 | Set the maximum connection number for SoftAP mode. | | data[0] represents the value of the connection number, |
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| | | | ranging from 1 to 4. When the transmission direction is ESP32 |
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| | | | to the mobile phone, it means to provide the mobile phone with |
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| | | | the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x7b’000111 | Set the authentication mode for the SoftAP. | | data[0]： |
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+ + + +-----------------------------------------------------------------------+
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| | | | 0x00: OPEN |
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+ + + +-----------------------------------------------------------------------+
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| | | | 0x01: WEP |
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+ + + +-----------------------------------------------------------------------+
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| | | | 0x02: WPA_PSK |
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+ + + +-----------------------------------------------------------------------+
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| | | | 0x03: WPA2_PSK |
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+ + + +-----------------------------------------------------------------------+
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| | | | 0x04: WPA_WPA2_PSK |
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+ + + +-----------------------------------------------------------------------+
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x8b’001000 | Set the channel amount for SoftAP mode. | | data[0] represents the quantity of the supported channels, |
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| | | | ranging from 1 to 14. |
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| | | | When the transmission direction is ESP32 to the mobile phone, |
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| | | | it means to provide the mobile phone with the needed information. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0x9b’001001 | Username | It provides the username of the GATT client when using | The length of the data depends on the length field. |
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| | | encryption of enterprise level. | |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0xab’001010 | CA Certification | It provides the CA Certification when using encryption | The length of the data depends on the length field. |
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| | | of enterprise level. | The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0xbb’001011 | Client Certification | It provides the client certification when | The length of the data depends on the length field. |
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| | | using encryption of enterprise level. | The frame supports to be fragmented if the data length is not enough. |
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| | | Whether the private key is contained or not | |
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| | | depends on the content of the certification. | |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0xcb’001100 | Server Certification | It provides the sever certification when using | The length of the data depends on the length field. |
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| | | encryption of enterprise level. Whether the private key is | The frame supports to be fragmented if the data length is not enough. |
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| | | contained or not depends on the content of the certification. | |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0xdb’001101 | ClientPrivate Key | It provides the private key of the client when | The length of the data depends on the length field. |
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| | | using encryption of enterprise level. | The frame supports to be fragmented if the data length is not enough. |
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+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
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| 0xeb’001110 | ServerPrivate Key | It provides the private key of the sever when | The length of the data depends on the length field. |
|
||||
| | | using encryption of enterprise level. | The frame supports to be fragmented if the data length is not enough. |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
| 0xfb’001111 | Wi-Fi Connection State Report | To notify the phone of the ESP32's Wi-Fi status, | data[0] represents opmode, including: |
|
||||
+ + + including STA status and SoftAP status. +-----------------------------------------------------------------------+
|
||||
| | | It is for the STA device to connect to the | 0x00: NULL |
|
||||
+ + + mobile phone or the SoftAP. +-----------------------------------------------------------------------+
|
||||
| | | However, when the mobile phone receives the Wi-Fi status, | 0x01: STA |
|
||||
+ + + it can reply to other frames in addition to this frame. +-----------------------------------------------------------------------+
|
||||
| | | | 0x02: SoftAP |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x03: SoftAP&STA |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | data[1]：the connection state of the STA device, |
|
||||
| | | | 0x0 indicates a connection state, |
|
||||
| | | | and others represent a disconnected state; |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | data[2]：the connection state of the SoftAP, |
|
||||
| | | | that is, how many STA devices have been connected. |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | data[3] and the subsequent is in accordance with the |
|
||||
| | | | format of SSID/BSSID information. |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
| 0x10b’010000 | Version | | data[0]= great versiondata[1]= sub version |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
| 0x11B’010001 | Wi-Fi List | To send the Wi-Fi list to ESP32. | The format of the data frame is length + RSSI + SSID |
|
||||
| | | | and it supports to be sent into fragments |
|
||||
| | | | if the data length is too long. |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
| 0x12B’010010 | Report Error | To notify the mobile phone that there is an error with BluFi. | 0x00: sequence error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x01: checksum error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x02: decrypt error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x03: encrypt error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x04: init security error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x05: dh malloc error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x06: dh param error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x07: read param error |
|
||||
+ + + +-----------------------------------------------------------------------+
|
||||
| | | | 0x08: make public error |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
| 0x13B’010011 | Custom Data | To send or receive custom data. | The data frame supports to be sent into |
|
||||
| | | | fragments if the data length is too long. |
|
||||
+--------------+----------------------------------------------------+---------------------------------------------------------------+-----------------------------------------------------------------------+
|
||||
|
||||
2. Frame Control
|
||||
|
||||
Control field, takes 1 Byte and each bit has a different meaning.
|
||||
Control field, takes 1 byte and each bit has a different meaning.
|
||||
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| Bit | Meaning |
|
||||
+====================+================================================================================================+
|
||||
| 0x01 | Indicates whether the frame is encrypted. |
|
||||
+ +------------------------------------------------------------------------------------------------+
|
||||
| | 1 means encryption, and 0 means unencrypted. |
|
||||
+ +------------------------------------------------------------------------------------------------+
|
||||
| | The encrypted part of the frame includes |
|
||||
| | the full clear data before the DATA field is encrypted (no checksum). |
|
||||
+ +------------------------------------------------------------------------------------------------+
|
||||
| | Control frame is not encrypted, so this bit is 0. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| 0x02 | The data field that indicates whether a frame contains |
|
||||
| | a checksum (such as SHA1,MD5,CRC, etc.) for the end of |
|
||||
| | the frame data field includes SEQUCNE + data length + clear text. |
|
||||
| | Both the control frame and the data frame can contain a check bit or not. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| 0x04 | Represents the data direction. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 0 means the mobile phone to ESP32; |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 1 means ESP32 to the mobile phone. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| 0x08 | Indicates whether the other person is required to reply to an ACK. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 0 indicates no requirement; |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 1 indicates to reply Ack. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| 0x10 | Indicates whether there are subsequent data fragments. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 0 indicates that there are no subsequent data fragments for this frame; |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | 1 indicates that there are subsequent data fragments and used to transmit longer data. |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| | In the case of a frag frame, |
|
||||
| | the total length of the current content section + subsequent content section is given, |
|
||||
| | in the first 2 bytes of the data field (that is, the content data of the maximum support 64K). |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
| 0x10~0x80 reserved | |
|
||||
+--------------------+------------------------------------------------------------------------------------------------+
|
||||
|
||||
3. Sequence Control
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user