pitrix/src/mqtt.cpp

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

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

#if defined( ESP8266 )
#include <ESP8266WiFi.h>
#elif defined( ESP32 )
#include <WiFi.h>
#else
#error "Neither ESP32 nor ESP8266 set..."
#endif
#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;

uint8_t weather_icon_ids[6] = {0, 0, 0, 0, 0, 0};
int8_t weather_temperatures[6] = {0, 0, 0, 0, 0, 0};

void mqtt_callback(char* complete_topic, byte* pl, unsigned int length) {
	pl[length] = '\0';
	char* payload = (char*)pl;
	LOG("MQTT * Received data for topic "); LOGln(complete_topic);

	if (strncmp(complete_topic, MQTT_TOPIC_WEATHER, strlen(MQTT_TOPIC_WEATHER))==0) {
		// Weather stuff
		complete_topic += strlen(MQTT_TOPIC_WEATHER);
		if (strncmp(complete_topic, "icons/", 6)==0) {
			complete_topic += 6; // strlen("icons/")=6
			uint8_t id = complete_topic[0] - '0'; // ID is 1 digit. Substract '0' from it to get it as number.
			if (id>=6) return;
			weather_icon_ids[id] = atol(payload);
		} else if (strncmp(complete_topic, "temperatures/", 13)==0) {
			complete_topic += 13; // strlen("temperatures/")=13
			uint8_t id = complete_topic[0] - '0'; // ID is 1 digit. Substract '0' from it to get it as number.
			if (id>=6) return;
			weather_temperatures[id] = atol(payload);
		}
		return;
	}

	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];
	int chipid;
	#if defined( ESP8266 )
	chipid = ESP.getChipId();
	#elif defined( ESP32 )
	chipid = ESP.getEfuseMac() & 0xFFFFFF;
	#else
	#error Neither ESP32 nor ESP8266 set.
	#endif
	snprintf(client_id, 30, HOSTNAME, chipid);
	LOG("MQTT * Connecting to MQTT server with client id "); LOGln(client_id);
	if (mqtt_client.connect(client_id, MQTT_USER, MQTT_PASS, MQTT_TOPIC "status", 0, true, "OFFLINE", true)) {
		LOGln("MQTT * Connected.");
		mqtt_client.publish(MQTT_TOPIC "status", "ONLINE");
		mqtt_client.subscribe(MQTT_TOPIC "+");
		mqtt_client.subscribe(MQTT_TOPIC_WEATHER "#");
	}
	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