• 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).

ESP-MQTT is a standard ESP-IDF component. Please refer to instructions in ESP-IDF

• 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

• MQTT Package - Stephen Robinson - contiki-mqtt
• Others @tuanpmt Apache License

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