int led=16;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(led,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  int k=analogRead(34);
  Serial.print("ldr:");
  Serial.println(k);
  if(k>=500){
    digitalWrite(led,HIGH);
  }else{
    digitalWrite(led,LOW);
  }
}