MQTT over Websocket
Overview
This example connects to the broker URI by using MQTT Websocket and as a demonstration subscribes/unsubscribes and send a message on certain topic. (Please note that the public broker is maintained by the community so may not be always available, for details please see this disclaimer)
Requirements
A working AP is required.
Configure WiFi SSID and WiFi Password in menuconfig.
Configure the Broker URL in menuconfig.
Building and flashing
Example Location： examples/network/mqtt/ws
For operations such as compiling and burning, please refer to: Quick Start Guide
Running Result
Upon successful execution, it will output the following logs
I/wm_nm_core [5.666] got ip: 192.168.3.208
D/wm_nm_core [5.672] WM_NM_EV post event 4 success
I/mqtt example [6.176] wifi station start success, network is ready!
D/mqtt [6.184] uri: ws://mqtt.eclipseprojects.io:80
D/mqtt [6.190] ======================================
D/mqtt [6.196] Trace Output
D/mqtt [6.200] se Paho Synchronous MQTT C Client Library
D/mqtt [6.206] se Paho Synchronous MQTT C Client Library
D/mqtt [6.212] 16
D/mqtt [6.216] ======================================
D/mqtt [6.236] connect out: rc=119
D/mqtt [6.240] wait connect, timeout: 29980
D/mqtt [6.554] wait end
E/mqtt [6.558] client W800_29315F, packet_type 1, timeout 29980, pack 0x0
D/mqtt [6.570] wait connect, timeout: 29652
D/mqtt [6.848] wait end
E/mqtt [6.850] client W800_29315F, packet_type 1, timeout 29652, pack 0x0
D/mqtt [6.862] wait connect ack, timeout: 29360
D/mqtt [7.152] wait end
E/mqtt [7.158] client W800_29315F, packet_type 2, timeout 29360, pack 0x0
D/mqtt [7.166] MQTTClient connected!
I/mqtt example [7.170] mqtt connected
D/mqtt [7.174] mqtt client publish, topic /topic/qos1
D/mqtt [7.182] mqtt client publish, token: 1
I/mqtt example [7.190] sent publish successful, msg_id=1
D/mqtt [7.196] mqtt client subscribe, topic /topic/qos0, qos 0
D/mqtt [7.206] wait sub ack, timeout: 10000
D/mqtt [7.472] Message with token value 1 delivery confirmed
D/mqtt [7.744] wait end
E/mqtt [7.746] client W800_29315F, packet_type 9, timeout 10000, pack 0x0
I/mqtt example [7.758] sent subscribe successful, msg_id=2
D/mqtt [7.762] mqtt client subscribe, topic /topic/qos1, qos 1
D/mqtt [7.772] wait sub ack, timeout: 10000
D/mqtt [8.044] wait end
E/mqtt [8.048] client W800_29315F, packet_type 9, timeout 10000, pack 0x0
I/mqtt example [8.058] sent subscribe successful, msg_id=3
D/mqtt [8.064] mqtt client unsubscribe, topic /topic/qos1
D/mqtt [8.074] wait unsub ack, timeout: 10000
D/mqtt [8.344] wait end
E/mqtt [8.348] client W800_29315F, packet_type 11, timeout 10000, pack 0x0
I/mqtt example [8.356] sent unsubscribe successful, msg_id=4