multi-esp/multi-esp.ino

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
#include <RCSwitch.h>
#include "secrets.h"

#define MQTT_VERSION MQTT_VERSION_3_1_1

RCSwitch mySwitch = RCSwitch();

typedef struct {
	char* channel;
	char* id;
	String name;
	bool powered;
	uint8_t type; // 0=DIP, 1=Learned
	int on_code;
	int off_code;
} PowerSocket;

// see struct for description of fields
PowerSocket sockets[] = {
	(PowerSocket) {"00000", "10000", "A", false, 0, -1, -1},
	(PowerSocket) {"00000", "01000", "B", false, 0, -1, -1},
	(PowerSocket) {"00000", "00100", "C", false, 0, -1, -1},
	(PowerSocket) {"00000", "00010", "D", false, 0, -1, -1},
	(PowerSocket) {"", "", "E", false, 1, 530800, 713872},
	(PowerSocket) {"", "", "F", false, 1, 172340, 409380},
	(PowerSocket) {"", "", "G", false, 1, 842428, 409388},
	(PowerSocket) {"", "", "H", false, 1, 713874, 530802}
};

int numofsockets = sizeof(sockets)/sizeof(sockets[0]);

// MQTT: ID, server IP, port, username and password
const PROGMEM char* MQTT_CLIENT_ID = "multi-esp";
const PROGMEM char* MQTT_SERVER_IP = "10.42.0.3";
const PROGMEM uint16_t MQTT_SERVER_PORT = 1883;
// TODO: check if needed?
//const PROGMEM char* MQTT_USER = "[Redacted]";
//const PROGMEM char* MQTT_PASSWORD = "[Redacted]";



// MQTT: topics
const char* MQTT_LIGHT_STATE_TOPIC = "balcony/hanging_lamp/status";
const char* MQTT_LIGHT_COMMAND_TOPIC = "balcony/hanging_lamp/switch";

const char* MQTT_RFSOCKET_STATE_BASE = "rfsockets/";
const char* MQTT_RFSOCKET_STATE_TOPIC = "/status";
const char* MQTT_RFSOCKET_COMMAND_TOPIC = "/switch";

// payloads by default (on/off)
const char* LIGHT_ON = "ON";
const char* LIGHT_OFF = "OFF";

//const PROGMEM uint8_t LED_PIN = 5;
boolean m_light_state = false; // light is turned off by default

WiFiClient wifiClient;
PubSubClient client(wifiClient);

// function called to publish the state of the light (on/off)
void publishLightState() {
  if (m_light_state) {
    client.publish(MQTT_LIGHT_STATE_TOPIC, LIGHT_ON, true);
  } else {
    client.publish(MQTT_LIGHT_STATE_TOPIC, LIGHT_OFF, true);
  }
}

// function called to turn on/off the light
void setLightState() {
	byte socketIdx = 7;
  if (m_light_state) {
		setSocket(socketIdx, true);
    Serial.println("INFO: Turn light on...");
  } else {
		setSocket(socketIdx, false);
    Serial.println("INFO: Turn light off...");
  }
}

// function called when a MQTT message arrived
void callback(char* p_topic, byte* p_payload, unsigned int p_length) {
  // concat the payload into a string
  String payload;
  for (uint8_t i = 0; i < p_length; i++) {
    payload.concat((char)p_payload[i]);
  }

  // handle message topic
  if (String(MQTT_LIGHT_COMMAND_TOPIC).equals(p_topic)) {
    // test if the payload is equal to "ON" or "OFF"
    if (payload.equals(String(LIGHT_ON))) {
      if (m_light_state != true) {
        m_light_state = true;
        setLightState();
        publishLightState();
      }
    } else if (payload.equals(String(LIGHT_OFF))) {
      if (m_light_state != false) {
        m_light_state = false;
        setLightState();
        publishLightState();
      }
    }
  }
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.println("INFO: Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect(MQTT_CLIENT_ID)) {
      Serial.println("INFO: connected");
      // Once connected, publish an announcement...
      publishLightState();
      // ... and resubscribe
      client.subscribe(MQTT_LIGHT_COMMAND_TOPIC);
    } else {
      Serial.print("ERROR: failed, rc=");
      Serial.print(client.state());
      Serial.println("DEBUG: try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

bool setSocket(int socketIdx, bool newStatus) {
	PowerSocket socket;
	bool success = false;

	if (socketIdx >= 0) {
		success = true;
		socket = sockets[socketIdx];
		socket.powered = newStatus;
		sockets[socketIdx] = socket; // write back to status array
		if (newStatus == true) {
			for (char i  = 0; i <= 1; i++) {
				if (socket.type == 0) {
					Serial.println("id socket");
					mySwitch.setProtocol(1);
					mySwitch.switchOn(socket.channel, socket.id);
				} else if (socket.type == 1) {
					Serial.println("learning socket");
					mySwitch.setProtocol(5);
					mySwitch.send(socket.on_code, 24);
				}
				delay(250);
			}
		} else {
			for (char i  = 0; i <= 1; i++) {
				if (socket.type == 0) {
					Serial.println("id socket");
					mySwitch.setProtocol(1);
					mySwitch.switchOff(socket.channel, socket.id);
				} else if (socket.type == 1) {
					Serial.println("learning socket");
					char* off_code = socket.id;
					mySwitch.setProtocol(5);
					mySwitch.send(socket.off_code, 24);
				}
				delay(250);
			}
		}
	}

	return success;
}

int findSocketIndex(String name) {
	for (int socketIdx = 0; socketIdx < numofsockets; socketIdx++) {
		PowerSocket canidateSocket = sockets[socketIdx];
		if (canidateSocket.name == name) {
			return socketIdx;
		}
	}

	return -1;
}

void setup() {
	// setup serial
	Serial.begin(115200);
	Serial.println("Serial interface initialized");

	WiFi.mode(WIFI_STA);
	Serial.print("Connecting to wifi ");
	Serial.println(WIFI_SSID);
	WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

	Serial.println("Enable transmission while waiting on wifi");
	mySwitch.enableTransmit(2);
	delay(1000);
	setLightState();
	Serial.print("Transmission enabled, waiting for wifi now.");

	// Wait for connection
	while (WiFi.status() != WL_CONNECTED) {
		delay(500);
		Serial.print(".");
	}

	// serial output of connection details
	Serial.println("");
	Serial.print("Wifi connected to ");
	Serial.println(WIFI_SSID);
	Serial.print("IP address: ");
	Serial.println(WiFi.localIP());

	// init the MQTT connection
	client.setServer(MQTT_SERVER_IP, MQTT_SERVER_PORT);
	client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}