Very basic relay control

relay.ino

#include "SinricPro.h"
#include "SinricProSwitch.h"

#define WIFI_SSID         "YOUR-WIFI-SSID"    
#define WIFI_PASS         "YOUR-WIFI-PASS"
#define APP_KEY           "YOUR-APP-KEY"      // Should look like "de0bxxxx-1x3x-4x3x-ax2x-5dabxxxxxxxx"
#define APP_SECRET        "YOUR-APP-SECRET"   // Should look like "5f36xxxx-x3x7-4x3x-xexe-e86724a9xxxx-4c4axxxx-3x3x-x5xe-x9x3-333d65xxxxxx"
#define SWITCH_ID         "YOUR-DEVICE-ID"    // Should look like "5dc1564130xxxxxxxxxxxxxx"
#define BAUD_RATE         9600                // Change baudrate to your need

#define RELAY_PIN         D5                  // pin where Relay is connected to


bool onPowerState(const String &deviceId, bool &state) {
  Serial.printf("Device %s turned %s (via SinricPro) \r\n", deviceId.c_str(), state?"on":"off");
  digitalWrite(RELAY_PIN, state);
  return true; // request handled properly
}

void setupWiFi() {
  Serial.printf("\r\n[Wifi]: Connecting");
  WiFi.begin(WIFI_SSID, WIFI_PASS);

  while (WiFi.status() != WL_CONNECTED) {
    Serial.printf(".");
    delay(250);
  }
  Serial.printf("connected!\r\n[WiFi]: IP-Address is %s\r\n", WiFi.localIP().toString().c_str());
}

void setupSinricPro() {
  SinricProSwitch& mySwitch = SinricPro[SWITCH_ID];
  mySwitch.onPowerState(onPowerState);
  SinricPro.begin(APP_KEY, APP_SECRET);
}

void setup() {
  pinMode(RELAY_PIN, OUTPUT); // define LED GPIO as output

  Serial.begin(BAUD_RATE); Serial.printf("\r\n\r\n");
  setupWiFi();
  setupSinricPro();
}

void loop() {
  SinricPro.handle();
}