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MycilaMQTT

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License: MIT Contributor Covenant

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A simple and efficient MQTT/MQTTS client for Arduino / ESP32 based on Espressif API

Usage

  Mycila::MQTT::Config config;
  config.server = "test.mosquitto.org";
  config.port = 1884;
  config.username = "rw";
  config.password = "readwrite";
  config.clientId = "my-app-1234";
  config.willTopic = "foo/status";

  mqtt.onConnect([]() {
    Serial.println("MQTT connected");
  });

  mqtt.subscribe("my-app/value/set", [](const String& topic, const String& payload) {
    Serial.printf("MQTT message received: %s -> %s\r\n", topic.c_str(), payload.c_str());
  });

  mqtt.begin(config);
  mqtt.publish("my-app/value", "Hello World!");

SSL / TLS

Please see the examples to see how to use server certificates or CA certificate bundles.

Alternatives

PsychicMqttClient is also an MQTT library based on ESP-IDF written by @theelims that you might want to consider, which is more feature rich and has better support for CA bundles.