MyMQTT

My MQTT helper library for Arduino.

Nothing fancy. All the actual MQTT stuff is handled by PubSubClient.

The aim for me was just to make use of MQTT easier and not continue copying big blocks of code from project to project with small adaptions.

Example

#include <MyWiFi.h>
MyWiFi my_wifi;

#include <MyMQTT.h>
MyMQTT my_mqtt;

#include <ArduinoOTA.h>

#define RELAY_OUT 14

void wifi_config(const char* topic, byte* payload, unsigned int length)
{
  my_wifi.config();
}

void wifi_config()
{
  my_wifi.config();
}

void set_switch(const char* topic, int payload)
{
  char reply_topic[32];

  digitalWrite(RELAY_OUT, payload == 1);

  sprintf(reply_topic, "%s/state", my_wifi.hostname());
  my_mqtt.publish_retain(reply_topic, payload);
}

void setup() {
  char topic[32];

  pinMode(RELAY_OUT, OUTPUT);
  digitalWrite(RELAY_OUT, LOW);

  Serial.begin(115200);

  my_wifi.setup();

  ArduinoOTA.setHostname(my_wifi.hostname());
  ArduinoOTA.begin();

  sprintf(topic, "%s/set", my_wifi.hostname());
  my_mqtt.add_topic(topic, set_switch);

  sprintf(topic, "%s/wifi", my_wifi.hostname());
  my_mqtt.add_topic(topic, wifi_config);

  my_mqtt.set_max_retry_count_and_handler(5, wifi_config);

  my_mqtt.init(my_wifi.server(), my_wifi.hostname());

}

void loop() {
  my_mqtt.loop();
  my_wifi.loop();
  ArduinoOTA.handle();
}