Alexa Controlled Light Switch (with servo)

/*
 * Example for how to use SinricPro Switch device:
 * - setup a switch device
 * - handle request using callback (turn on/off builtin led indicating device power state)
 * - send event to sinricPro server (flash button is used to turn on/off device manually)
 * 
 * If you encounter any issues:
 * - check the readme.md at https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md
 * - ensure all dependent libraries are installed
 *   - see https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md#arduinoide
 *   - see https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md#dependencies
 * - open serial monitor and check whats happening
 * - check full user documentation at https://sinricpro.github.io/esp8266-esp32-sdk
 * - visit https://github.com/sinricpro/esp8266-esp32-sdk/issues and check for existing issues or open a new one
 */

// Uncomment the following line to enable serial debug output
//#define ENABLE_DEBUG

#ifdef ENABLE_DEBUG
       #define DEBUG_ESP_PORT Serial
       #define NODEBUG_WEBSOCKETS
       #define NDEBUG
#endif 
#include <Servo.h>
#include <Arduino.h>
#ifdef ESP8266 
       #include <ESP8266WiFi.h>
#endif 
#ifdef ESP32   
       #include <WiFi.h>
#endif

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

#define WIFI_SSID         "**********"    
#define WIFI_PASS         "**********"
#define APP_KEY           "**********"      // Should look like "de0bxxxx-1x3x-4x3x-ax2x-5dabxxxxxxxx"
#define APP_SECRET        "**********"   // Should look like "5f36xxxx-x3x7-4x3x-xexe-e86724a9xxxx-4c4axxxx-3x3x-x5xe-x9x3-333d65xxxxxx"
#define SWITCH_ID         "**********"    // Should look like "5dc1564130xxxxxxxxxxxxxx"
#define BAUD_RATE         9600                // Change baudrate to your need

#define BUTTON_PIN 0   // GPIO for BUTTON (inverted: LOW = pressed, HIGH = released)
#define LED_PIN   2   // GPIO for LED (inverted)

Servo myservo;

int pos=50;
bool myPowerState = false;
unsigned long lastBtnPress = 0;

/* bool onPowerState(String deviceId, bool &state) 
 *
 * Callback for setPowerState request
 * parameters
 *  String deviceId (r)
 *    contains deviceId (useful if this callback used by multiple devices)
 *  bool &state (r/w)
 *    contains the requested state (true:on / false:off)
 *    must return the new state
 * 
 * return
 *  true if request should be marked as handled correctly / false if not
 */
bool onPowerState(const String &deviceId, bool &state) {
  Serial.printf("Device %s turned %s (via SinricPro) \r\n", deviceId.c_str(), state?"on":"off");
  myPowerState = state;
  digitalWrite(LED_PIN, myPowerState?LOW:HIGH);

  if (myPowerState == 1){
    for (pos = 50; pos >= 10; pos -= 1) { // goes from 0 degrees to 180 degrees
      // in steps of 1 degree
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(5);                       // waits 15ms for the servo to reach the position
    }
    for (pos = 10; pos <= 50; pos += 1) { // goes from 180 degrees to 0 degrees
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(5);                       // waits 15ms for the servo to reach the position
    }
  }

  if (myPowerState == 0){
    for (pos = 50; pos <= 90; pos += 1) { // goes from 0 degrees to 180 degrees
      // in steps of 1 degree
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(5);                       // waits 15ms for the servo to reach the position
    }
    for (pos = 90; pos >= 50; pos -= 1) { // goes from 180 degrees to 0 degrees
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(5);                       // waits 15ms for the servo to reach the position
    }
    
  }

  
  return true; // request handled properly
  
}


// setup function for WiFi connection
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());
}

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

  // 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);
}

// main setup function
void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP); // GPIO 0 as input, pulled high
  pinMode(LED_PIN, OUTPUT); // define LED GPIO as output
  digitalWrite(LED_PIN, HIGH); // turn off LED on bootup
  myservo.attach(2);
  myservo.write(pos);
  Serial.begin(BAUD_RATE); Serial.printf("\r\n\r\n");
  setupWiFi();
  setupSinricPro();
}

void loop() {
  SinricPro.handle();
  digitalWrite(LED_PIN, HIGH);
}