diff --git a/examples/bluetooth/bluedroid/ble/gatt_client/tutorial/Gatt_Client_Example_Walkthrough.md b/examples/bluetooth/bluedroid/ble/gatt_client/tutorial/Gatt_Client_Example_Walkthrough.md index e102279f47..26a639b8a0 100644 --- a/examples/bluetooth/bluedroid/ble/gatt_client/tutorial/Gatt_Client_Example_Walkthrough.md +++ b/examples/bluetooth/bluedroid/ble/gatt_client/tutorial/Gatt_Client_Example_Walkthrough.md @@ -484,7 +484,8 @@ Where, ```c #define REMOTE_SERVICE_UUID 0x00FF ``` -There will be a detail to note if the UUID of the service application that the client is interested in is a 128-bit UUID, which is related to the little-endian storage mode of the processor architecture . The struct of UUID is defined as: +If UUID of the service application the user is interested in is 128-bit, then there is one note below for the user which is relevant with the little-endian storage mode of the processor architecture. +The struct of UUID is defined as: ```c typedef struct { @@ -500,7 +501,7 @@ typedef struct { } __attribute__((packed)) esp_bt_uuid_t; ``` -In little-endian storage mode, you can define service UUID directly in the normal order if it's a 16-bit or a 32-bit UUID. However, if service UUID is a 128-bit UUID, there is a little difference. For example, if the UUID of the service application that the client is interested in is 12345678-a1b2-c3d4-e5f6-9fafd205e457, `REMOTE_SERVICE_UUID` should be defined as {0x57,0xE4,0x05,0xD2,0xAF,0x9F,0xF6,0xE5,0xD4,0xC3,0xB2,0xA1,0x78,0x56,0x34,0x12}. +Note: In little-endian storage mode, you can define service UUID directly in the normal order if it's a 16-bit or a 32-bit UUID, but if service UUID is 128-bit, there is minor difference. For example, if the UUID of the service application that the user is interested in is 12345678-a1b2-c3d4-e5f6-9fafd205e457, `REMOTE_SERVICE_UUID` should be defined as {0x57,0xE4,0x05,0xD2,0xAF,0x9F,0xF6,0xE5,0xD4,0xC3,0xB2,0xA1,0x78,0x56,0x34,0x12}. The services are then discovered as follows: