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Strom: v3.3.6
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esp-idf
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examples
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protocols
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mqtt
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ws
xiehang ee2b8a65a0 esp_wifi: Modify ESP_IF_WIFI_STA to WIFI_IF_STA 5 rokov pred
..
main ee2b8a65a0 esp_wifi: Modify ESP_IF_WIFI_STA to WIFI_IF_STA 4 rokov pred
CMakeLists.txt 23345d2021 MQTT: Integrate esp-mqtt library into idf 7 rokov pred
Makefile 23345d2021 MQTT: Integrate esp-mqtt library into idf 7 rokov pred
README.md 5d4cd1269b MQTT: update default broker URL for examples 6 rokov pred
mqtt_ws_example_test.py 5d4cd1269b MQTT: update default broker URL for examples 6 rokov pred
sdkconfig.ci b13a536041 mqtt tests: connect to local broker when running in CI to make the tests more reliable 7 rokov pred

README.md

ESP-MQTT MQTT over Websocket

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example connects to the broker mqtt.eclipse.org over web sockets as a demonstration subscribes/unsubscribes and send a message on certain topic.

It uses ESP-MQTT library which implements mqtt client to connect to mqtt broker.

How to use example

Hardware Required

This example can be executed on any ESP32 board, the only required interface is WiFi and connection to internet.

Configure the project

make menuconfig

  • Set serial port under Serial Flasher Options.

  • Set ssid and password for the board to connect to AP.

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

make -j4 flash monitor

(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 (3714) event: sta ip: 192.168.0.139, mask: 255.255.255.0, gw: 192.168.0.2
I (3714) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (3964) MQTT_CLIENT: Sending MQTT CONNECT message, type: 1, id: 0000
I (4164) MQTTWS_EXAMPLE: MQTT_EVENT_CONNECTED
I (4174) MQTTWS_EXAMPLE: sent publish successful, msg_id=41464
I (4174) MQTTWS_EXAMPLE: sent subscribe successful, msg_id=17886
I (4174) MQTTWS_EXAMPLE: sent subscribe successful, msg_id=42970
I (4184) MQTTWS_EXAMPLE: sent unsubscribe successful, msg_id=50241
I (4314) MQTTWS_EXAMPLE: MQTT_EVENT_PUBLISHED, msg_id=41464
I (4484) MQTTWS_EXAMPLE: MQTT_EVENT_SUBSCRIBED, msg_id=17886
I (4484) MQTTWS_EXAMPLE: sent publish successful, msg_id=0
I (4684) MQTTWS_EXAMPLE: MQTT_EVENT_SUBSCRIBED, msg_id=42970
I (4684) MQTTWS_EXAMPLE: sent publish successful, msg_id=0
I (4884) MQTT_CLIENT: deliver_publish, message_length_read=19, message_length=19
I (4884) MQTTWS_EXAMPLE: MQTT_EVENT_DATA
TOPIC=/topic/qos0
DATA=data
I (5194) MQTT_CLIENT: deliver_publish, message_length_read=19, message_length=19
I (5194) MQTTWS_EXAMPLE: MQTT_EVENT_DATA
TOPIC=/topic/qos0
DATA=data