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ddde502782
Fixes error processing on network reads: 1) Treat EOF as an error, since the connection is closed (FIN) from the server side. If we didn't we would try to read (in the next iteration) from the same socket that has been already closed and get an error ENOTCONN. Before the fix: D (13760) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read(): EOF E (13800) transport_base: tcp_read error, errno=Socket is not connected E (13800) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read() error: errno=128 D (13810) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=0 I (13820) esp_mqtt_demo: MQTT_EVENT_ERROR E (13830) esp_mqtt_demo: Last error reported from esp-tls: 0x8008 E (13830) esp_mqtt_demo: Last error captured as transport's socket errno: 0x80 I (13840) esp_mqtt_demo: Last errno string (Socket is not connected) E (13850) mqtt_client: mqtt_process_receive: mqtt_message_receive() returned -1 D (13860) mqtt_client: Reconnect after 10000 ms D (13860) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=2 I (13870) esp_mqtt_demo: MQTT_EVENT_DISCONNECTED After the fix: E (12420) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read(): EOF E (12420) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read() error: errno=128 D (12430) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=0 I (12440) esp_mqtt_demo: MQTT_EVENT_ERROR E (12450) esp_mqtt_demo: Last error reported from esp-tls: 0x8008 I (12450) esp_mqtt_demo: Last errno string (Success) E (12460) mqtt_client: mqtt_process_receive: mqtt_message_receive() returned -1 D (12470) mqtt_client: Reconnect after 10000 ms D (12470) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=2 I (12480) esp_mqtt_demo: MQTT_EVENT_DISCONNECTED 2) Treat timeouts in the middle of MQTT message reading as errors (if timeouted for the second time and didn't read a byte) Before the fix: D (9160) mqtt_client: mqtt_message_receive: read "remaining length" byte: 0x2 D (9170) mqtt_client: mqtt_message_receive: total message length: 4 (already read: 2) D (19190) mqtt_client: mqtt_message_receive: read_len=0 D (19190) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read(): call timed out before data was ready! E (19200) mqtt_client: esp_mqtt_connect: mqtt_message_receive() returned 0 E (19210) mqtt_client: MQTT connect failed D (19220) mqtt_client: Reconnect after 10000 ms D (19220) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=2 I (19230) esp_mqtt_demo: MQTT_EVENT_DISCONNECTED After the fix: D (19190) mqtt_client: mqtt_message_receive: read_len=0 E (19190) mqtt_client: Network timeout while reading MQTT message E (19200) mqtt_client: esp_mqtt_handle_transport_read_error: transport_read() error: errno=119 D (19210) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=0 I (19220) esp_mqtt_demo: MQTT_EVENT_ERROR I (19220) esp_mqtt_demo: Last errno string (Success) E (19230) mqtt_client: esp_mqtt_connect: mqtt_message_receive() returned -1 E (19240) mqtt_client: MQTT connect failed D (19240) mqtt_client: Reconnect after 10000 ms D (19240) esp_mqtt_demo: Event dispatched from event loop base=MQTT_EVENTS, event_id=2 I (19250) esp_mqtt_demo: MQTT_EVENT_DISCONNECTED (Note that the above log is from mid-message timeout of CONNECT message, which was hadled before the fix. If the mid-message timeout ocurs with for example SUBACK, the current version would repeatably resend susbscribe message) Merges https://github.com/espressif/esp-mqtt/pull/232
ESP32 MQTT Library
Features
- Based on: https://github.com/tuanpmt/esp_mqtt
- Support MQTT over TCP, SSL with mbedtls, MQTT over Websocket, MQTT over Websocket Secure
- Easy to setup with URI
- Multiple instances (Multiple clients in one application)
- Support subscribing, publishing, authentication, will messages, keep alive pings and all 3 QoS levels (it should be a fully functional client).
How to use
ESP-MQTT is a standard ESP-IDF component. Please refer to instructions in ESP-IDF
Documentation
-
Please refer to the standard ESP-IDF, documentation for the latest version: https://docs.espressif.com/projects/esp-idf/
-
Documentation of ESP-MQTT API: https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/protocols/mqtt.html
License
- MQTT Package - Stephen Robinson - contiki-mqtt
- Others @tuanpmt Apache License
Older IDF verisons
For ESP-IDF versions prior to IDFv3.2, please clone as a component of ESP-IDF:
git submodule add https://github.com/espressif/esp-mqtt.git components/espmqtt
and checkout the ESP-MQTT_FOR_IDF_3.1 tag