MQTT Client library for ESP8266 Arduino

This is MQTT client library for ESP8266, using mqtt_msg package from MQTT client library for Contiki and use for ESP8266 NON-OS SDK esp_mqtt

Features:

• Support subscribing, publishing, authentication, will messages, keep alive pings and all 3 QoS levels (it should be a fully functional client).

Requirements

• ESP8266WiFi
• WiFiClientSecure

Status

• Support 3 type of qos (0, 1, 2) and outbox
• only mqtt over TCP

MQTT URI Scheme

• mqtt://[username][:password@]hostname[:port][#clientId]
  • mqtt for MQTT over TCP
  • ws for MQTT over Websocket
• Example:
  • Full mqtt://username:password@test.mosquitto.org:1883#my_client_id
  • Websocket ws://username:password@test.mosquitto.org:1883/mqtt#my_client_id
  • Minimal mqtt://test.mosquitto.org, with user, pass = NULL, port = 1883, client id = "ESP_" + ESP.getChipId()

API

Setup

• bool begin(String uri);
• bool begin(String uri, int keepalive, bool clean_session);
• bool begin(String uri, LwtOptions lwt);
• bool begin(String uri, LwtOptions lwt, int keepalive, bool clean_session)

Events

• void onConnect(THandlerFunction fn);
• void onDisconnect(THandlerFunction fn);
• void onSubscribe(THandlerFunction_PubSub fn);
• void onPublish(THandlerFunction_PubSub fn);
• void onData(THandlerFunction_Data fn);

Pub/Sub

• int subscribe(String topic);
• int subscribe(String topic, uint8_t qos);
• int publish(String topic, String data);
• int publish(String topic, String data, int qos, int retain);

License

Copyright (c) 2016 Tuan PM (https://twitter.com/tuanpmt) ESP8266 port (c) 2016 Ivan Grokhotkov (ivan@esp8266.com)

License Apache License