thermostat_example.ino

thermostat_example.ino

/*
 Version 0.2 - Feb 15 2018
*/ 

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <WebSocketsClient.h> //  get it from https://github.com/Links2004/arduinoWebSockets/releases 
#include <ArduinoJson.h> // get it from https://arduinojson.org/ or install via Arduino library manager

ESP8266WiFiMulti WiFiMulti;
WebSocketsClient webSocket;

#define MyApiKey "xxxxxxxxxxxxxxxx" // TODO: Change to your sinric API Key. Your API Key is displayed on sinric.com dashboard
#define MySSID "xxxxxxxxxxxxxxxx" // TODO: Change to your Wifi network SSID
#define MyWifiPassword "xxxxxxxxxxxxxxxx" // TODO: Change to your Wifi network password

#define HEARTBEAT_INTERVAL 300000 // 5 Minutes 

uint64_t heartbeatTimestamp = 0;
bool isConnected = false;

void turnOn(String deviceId) {
  if (deviceId == "5axxxxxxxxxxxxxxxxxxx") // Device ID of first device
  {  
    Serial.print("Turn on device id: ");
    Serial.println(deviceId);
  } 
  else if (deviceId == "5axxxxxxxxxxxxxxxxxxx") // Device ID of second device
  { 
    Serial.print("Turn on device id: ");
    Serial.println(deviceId);
  }
  else {
    Serial.print("Turn on for unknown device id: ");
    Serial.println(deviceId);    
  }     
}

void turnOff(String deviceId) {
   if (deviceId == "5axxxxxxxxxxxxxxxxxxx") // Device ID of first device
   {  
     Serial.print("Turn off Device ID: ");
     Serial.println(deviceId);
   }
   else if (deviceId == "5axxxxxxxxxxxxxxxxxxx") // Device ID of second device
   { 
     Serial.print("Turn off Device ID: ");
     Serial.println(deviceId);
  }
  else {
     Serial.print("Turn off for unknown device id: ");
     Serial.println(deviceId);    
  }
}

void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
  switch(type) {
    case WStype_DISCONNECTED:
      isConnected = false;    
      Serial.printf("[WSc] Webservice disconnected from sinric.com!\n");
      break;
    case WStype_CONNECTED: {
      isConnected = true;
      Serial.printf("[WSc] Service connected to sinric.com at url: %s\n", payload);
      Serial.printf("Waiting for commands from sinric.com ...\n");        
      }
      break;
    case WStype_TEXT: {
        Serial.printf("[WSc] get text: %s\n", payload);
        // Example payloads

        // For Thermostat
        // {"deviceId": xxxx, "action": "setPowerState", value: "ON"} // https://developer.amazon.com/docs/device-apis/alexa-thermostatcontroller.html
		// {"deviceId": xxxx, "action": "SetTargetTemperature", value: "targetSetpoint": { "value": 20.0, "scale": "CELSIUS"}} // https://developer.amazon.com/docs/device-apis/alexa-thermostatcontroller.html#settargettemperature
		// {"deviceId": xxxx, "action": "AdjustTargetTemperature", value: "targetSetpointDelta": { "value": 2.0, "scale": "FAHRENHEIT" }} // https://developer.amazon.com/docs/device-apis/alexa-thermostatcontroller.html#adjusttargettemperature
		// {"deviceId": xxxx, "action": "SetThermostatMode", value: "thermostatMode" : { "value": "COOL" }} // https://developer.amazon.com/docs/device-apis/alexa-thermostatcontroller.html#setthermostatmode
		        
        DynamicJsonBuffer jsonBuffer;
        JsonObject& json = jsonBuffer.parseObject((char*)payload); 
        String deviceId = json ["deviceId"];     
        String action = json ["action"];
        
		if(action == "setPowerState") { // On or Off
			String value = json ["value"];			

		}
        if(action == "SetTargetTemperature") { 
            // Alexa, set thermostat to 20			
			//String value = json ["value"];
			String value = json["value"]["targetSetpoint"]["value"];
			String scale = json["value"]["targetSetpoint"]["scale"];
        }
        else if(action == "AdjustTargetTemperature") { 
			//Alexa, make it warmer in here
			//Alexa, make it cooler in here
			String value = json["value"]["targetSetpointDelta"]["value"];
			String scale = json["value"]["targetSetpointDelta"]["scale"];
	
        }
        else if(action == "SetThermostatMode") { 
			//Alexa, set thermostat name to mode
			//Alexa, set thermostat to automatic
			//Alexa, set kitchen to off
			String value = json["value"]["thermostatMode"]["value"];
				
        }
        else if (action == "test") {
            Serial.println("[WSc] received test command from sinric.com");
        }
      }
      break;
    case WStype_BIN:
      Serial.printf("[WSc] get binary length: %u\n", length);
      break;
  }
}

void setup() {
  Serial.begin(115200);
  
  WiFiMulti.addAP(MySSID, MyWifiPassword);
  Serial.println();
  Serial.print("Connecting to Wifi: ");
  Serial.println(MySSID);  

  // Waiting for Wifi connect
  while(WiFiMulti.run() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  if(WiFiMulti.run() == WL_CONNECTED) {
    Serial.println("");
    Serial.print("WiFi connected. ");
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());
  }

  // server address, port and URL
  webSocket.begin("iot.sinric.com", 80, "/");

  // event handler
  webSocket.onEvent(webSocketEvent);
  webSocket.setAuthorization("apikey", MyApiKey);
  
  // try again every 5000ms if connection has failed
  webSocket.setReconnectInterval(5000);   // If you see 'class WebSocketsClient' has no member named 'setReconnectInterval' error update arduinoWebSockets
}

void loop() {
  webSocket.loop();
  
  if(isConnected) {
      uint64_t now = millis();
      
      // Send heartbeat in order to avoid disconnections during ISP resetting IPs over night. Thanks @MacSass
      if((now - heartbeatTimestamp) > HEARTBEAT_INTERVAL) {
          heartbeatTimestamp = now;
          webSocket.sendTXT("H");          
      }
  }   
}