dd81b56fb6
Updated examples to be able to build for C5 and P4. Added Ethernet support for static_ip example.
3.3 KiB
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
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ESP-MQTT SSL example with PSK verification
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This example connects to a local broker configured to PSK authentication
How to use example
Hardware Required
This example can be executed on any ESP32 board, the only required interface is WiFi (or ethernet) to connect to a MQTT broker with preconfigured PSK verification method.
Mosquitto settings
In case of using mosquitto broker, here is how to enable PSK authentication in mosquitto.config,
psk_hint hint
psk_file path_to_your_psk_file
allow_anonymous true
Note: Last line enables anonymous mode, as this example does not use mqtt username and password.
PSK file then has to contain pairs of hints and keys, as shown below:
hint:BAD123
Important note: Keys are stored as text hexadecimal values in PSK file, while the example code stores key as plain binary
as required by MQTT API. (See the example source for details: "BAD123" -> 0xBA, 0xD1, 0x23)
Configure the project
- Run
idf.py menuconfig - Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu. See "Establishing Wi-Fi or Ethernet Connection" section in examples/protocols/README.md for more details.
Build and Flash
(To exit the serial monitor, type Ctrl-].)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
Example Output
I (2160) example_connect: Ethernet Link Up
I (4650) example_connect: Connected to Ethernet
I (4650) example_connect: IPv4 address: 192.168.0.1
I (4650) MQTTS_EXAMPLE: [APP] Free memory: 244792 bytes
I (4660) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
D (4670) MQTT_CLIENT: MQTT client_id=ESP32_c6B4F8
D (4680) MQTT_CLIENT: Core selection disabled
I (4680) MQTTS_EXAMPLE: Other event id:7
D (4680) esp-tls: host:192.168.0.2: strlen 13
D (4700) esp-tls: ssl psk authentication
D (4700) esp-tls: handshake in progress...
D (4720) MQTT_CLIENT: Transport connected to mqtts://192.168.0.2:8883
I (4720) MQTT_CLIENT: Sending MQTT CONNECT message, type: 1, id: 0000
D (4720) MQTT_CLIENT: mqtt_message_receive: first byte: 0x20
D (4730) MQTT_CLIENT: mqtt_message_receive: read "remaining length" byte: 0x2
D (4730) MQTT_CLIENT: mqtt_message_receive: total message length: 4 (already read: 2)
D (4740) MQTT_CLIENT: mqtt_message_receive: read_len=2
D (4750) MQTT_CLIENT: mqtt_message_receive: transport_read():4 4
D (4750) MQTT_CLIENT: Connected
I (4760) MQTTS_EXAMPLE: MQTT_EVENT_CONNECTED
D (4760) MQTT_CLIENT: mqtt_enqueue id: 4837, type=8 successful
D (4770) OUTBOX: ENQUEUE msgid=4837, msg_type=8, len=18, size=18
D (4770) MQTT_CLIENT: Sent subscribe topic=/topic/qos0, id: 4837, type=8 successful
I (4780) MQTTS_EXAMPLE: sent subscribe successful, msg_id=4837
D (4790) MQTT_CLIENT: mqtt_enqueue id: 58982, type=8 successful
D (4790) OUTBOX: ENQUEUE msgid=58982, msg_type=8, len=18, size=36
D (4800) MQTT_CLIENT: Sent subscribe topic=/topic/qos1, id: 58982, type=8 successful
I (4810) MQTTS_EXAMPLE: sent subscribe successful, msg_id=58982