void setup() {
  pinMode(25, INPUT);
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  
}

void loop() {
  int ptmeter = analogRead(25);
  Serial.println(ptmeter);
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  
}