pitrix/src/mqtt.cpp

#include "my_mqtt.h"
#include "config.h"

#ifndef MQTT_ENABLE
	#pragma message "MQTT_ENABLE is false. Skipping MQTT."
#else

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include "EffectEntry.h"
#include "Effect.h"
#include "effects.h"
#include "functions.h"

WiFiClient wifi;
PubSubClient mqtt_client(wifi);
long mqtt_last_reconnect_attempt = 0;

void mqtt_callback(char* complete_topic, byte* pl, unsigned int length) {
  pl[length] = '\0';
  char* payload = (char*)pl;
  char* topic = complete_topic + strlen(MQTT_TOPIC); // Strip MQTT_TOPIC from the beginning

  // Here, payload is a char* (but has to be casted).
  if(strcmp(topic, "mode")==0) {
    for (int i=0; i<effects->size(); i++) {
      EffectEntry e = effects->get(i);
      if (strcmp(e.name, payload)==0) {
        //Serial.printf("Effect found in mqtt_callback: %p\n", (void *)&e->effect);
        current_effect->stop();
        current_effect = e.effect;
        current_effect->start();
        clear();
        return;
      }
    }
  } else if (strcmp(topic, "reboot")==0) {
    ESP.restart();
  }

  long value = atol(payload);

  if (strcmp(topic, "brightness")==0 && value > 0 && value <= 255) {
    FastLED.setBrightness(value);
  }
}

boolean mqtt_connect() {
  char client_id[30];
  snprintf(client_id, 30, HOSTNAME, ESP.getChipId());
  LOG("MQTT * Connecting to MQTT server with client id "); LOGln(client_id);
  if (mqtt_client.connect(client_id, MQTT_USER, MQTT_PASS)) {
    LOGln("MQTT * Connected.");
    mqtt_client.publish(MQTT_TOPIC "status", "ONLINE");
    mqtt_client.subscribe(MQTT_TOPIC "+");
  }
  return mqtt_client.connected();
}

void mqtt_setup() {
  mqtt_client.setServer(MQTT_SERVER, MQTT_PORT);
  mqtt_client.setCallback(mqtt_callback);
  mqtt_last_reconnect_attempt = 0;
}

void mqtt_loop() {
  if (!mqtt_client.connected()) {
    long now = millis();
    if (now - mqtt_last_reconnect_attempt > 5000) {
      mqtt_last_reconnect_attempt = now;
      if (mqtt_connect()) {
        mqtt_last_reconnect_attempt = 0;
      }
    }
  } else {
    mqtt_client.loop();
  }
}

String mqtt_log_str = String();

void mqtt_publish(const char* topic, int number) {
    char t[127];
    sprintf(t, MQTT_TOPIC "%s", topic);
    char b[32];
    sprintf(b, "%d", number);
    mqtt_client.publish(t, b);
}

void mqtt_log(const char* message) {
	mqtt_log_str.concat(message);
}

void mqtt_log(int number) {
    mqtt_log(String(number).c_str());
}

void mqtt_log(long unsigned int number) {
    mqtt_log(String(number).c_str());
}

void mqtt_log_ln(int number) {
    mqtt_log_ln(String(number).c_str());
}

void mqtt_log_ln(long unsigned int number) {
    mqtt_log_ln(String(number).c_str());
}

void mqtt_log_ln(const char* message) {
    if (mqtt_log_str.length()==0) {
		mqtt_log_send(message);
		return;
	} else {
		mqtt_log_str.concat(message);
		mqtt_log_send(mqtt_log_str.c_str());
		mqtt_log_str = String();
	}
}

void mqtt_log_send(const char* message) {
	if (mqtt_client.connected()) {
		mqtt_client.publish(MQTT_TOPIC_LOG, message);
	}
}

#endif // MQTT_ENABLE