#define survo_pin 22
#define TRIG_PIN 34
#define ECHO_PIN 35
#define SCL_pin 22
#define SDA_pin 21

int angle = 0;
boolean up= true;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  mySurvo.attack(survo_pin);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN,INPUT);

}
float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}


void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  Serial.print(angle);
  mySurvo.write(angle);
  delay(100);

  if (up==true){
    angle+=30;
  }else{
    angle-=30;
  }
  if (angle==0||angle==180){
    up=!up;
  }
  float distance = readDistanceCM();

  bool isNearby = distance < 100;
  digitalWrite(LED_BUILTIN, isNearby);

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());
  

}