https://help.sinric.pro/pages/tutorials/switch/part-2

switch-part-2-sinricpro.ino

#include <Arduino.h>
#if defined(ESP8266)
  #include <ESP8266WiFi.h>
#elif defined(ESP32) || defined(ARDUINO_ARCH_RP2040)
  #include <WiFi.h>
#endif

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

#define WIFI_SSID         ""  // Change WIFI_SSID to your WiFi Name.
#define WIFI_PASS         ""  // Change WIFI_PASS to your WiFi password.
#define APP_KEY           ""  // App Key
#define APP_SECRET        ""  // App Secret
#define SWITCH_ID_1       ""  // Device Id

#define BAUD_RATE         115200              // Change baudrate to your need

#if defined(ESP8266)
  #define BUTTON_PIN        15
  #define RELAYPIN_1        12
#elif defined(ESP32) 
  #define BUTTON_PIN        17
  #define RELAYPIN_1        16
#elif (ARDUINO_ARCH_RP2040)
  #define BUTTON_PIN        7
  #define RELAYPIN_1        6
#endif

bool myPowerState = false;
unsigned long lastBtnPress = 0;

bool onPowerState(const String &deviceId, bool &state) {
  Serial.printf("Device %s turned %s (via SinricPro) \r\n", deviceId.c_str(), state?"on":"off");
  
  digitalWrite(RELAYPIN_1, state ? HIGH:LOW);
  
   /* If your relay is activated with low signal, change the above to below code
  digitalWrite(RELAYPIN_1, state ? LOW : HIGH); */

  myPowerState = state;
  return true; // request handled properly
}

void handleButtonPress() {
  unsigned long actualMillis = millis();
  if (digitalRead(BUTTON_PIN) == HIGH && actualMillis - lastBtnPress > 1000)  {
    if (myPowerState) {
      myPowerState = false;
    } else {
      myPowerState = true;
    }
	
    // get Switch device back
    SinricProSwitch& mySwitch = SinricPro[SWITCH_ID_1];
    
    // send powerstate event to server
    mySwitch.sendPowerStateEvent(myPowerState); // send the new powerState to SinricPro server
    Serial.printf("Device %s turned %s (manually via button)\r\n", mySwitch.getDeviceId().c_str(), myPowerState?"on":"off");

    // set relay status  
    digitalWrite(RELAYPIN_1, myPowerState ? HIGH:LOW);
	 
    lastBtnPress = actualMillis;  // update last button press variable
  } 
}

// setup function for WiFi connection
void setupWiFi() {
  Serial.printf("\r\n[Wifi]: Connecting");

  #if defined(ESP8266)
    WiFi.setSleepMode(WIFI_NONE_SLEEP); 
    WiFi.setAutoReconnect(true);
  #elif defined(ESP32)
    WiFi.setSleep(false); 
    WiFi.setAutoReconnect(true);
  #endif

  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());
}

// setup function for SinricPro
void setupSinricPro() {
  // add device to SinricPro
  SinricProSwitch& mySwitch = SinricPro[SWITCH_ID_1];

  // set callback function to device
  mySwitch.onPowerState(onPowerState);

  // setup SinricPro
  SinricPro.onConnected([](){ Serial.printf("Connected to SinricPro\r\n"); }); 
  SinricPro.onDisconnected([](){ Serial.printf("Disconnected from SinricPro\r\n"); });
  SinricPro.begin(APP_KEY, APP_SECRET);
}


void setup() {
  pinMode(BUTTON_PIN, INPUT);
  pinMode(RELAYPIN_1, OUTPUT);
  
  Serial.begin(BAUD_RATE); Serial.printf("\r\n\r\n");
  setupWiFi();
  setupSinricPro();
}

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