#include <ESP32Servo.h>
// Define Buzzer pins
#define buzzPin 25
const int analogInPin = 2;  // Analog input pin that the potentiometer is attached to
const int analogOutPin = 4; // Analog output pin that the LED is attached to

int sensorValue = 0;        // value read from the pot
int outputValue = 0;        // value output to the PWM (analog out)

void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(115200);
  pinMode(analogOutPin, OUTPUT);  //輸出LED
  pinMode(analogInPin, INPUT); //輸入可變電阻器
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);
  // map it to the range of the analog out:
  // outputValue = map(sensorValue, 0, 4095, 0, 255);
  outputValue = map(sensorValue, 0, 4095, 50, 2200);
  // change the analog out value:
  // analogWrite(analogOutPin, outputValue);
  tone(analogOutPin, outputValue, 2000);
  tone(buzzPin, int(50+sensorValue*5), 2000);

  // print the results to the Serial Monitor:
  Serial.print("sensor = ");
  Serial.print(sensorValue);
  Serial.print("\t LED output = ");
  Serial.print(outputValue);
  Serial.print("\t Buzz output = ");
  Serial.print(int(50+sensorValue*5));
  Serial.println("Hz");

  // wait 2 milliseconds before the next loop for the analog-to-digital
  // converter to settle after the last reading:
  delay(200);
}