#define ldr 4
#define led 26
float analog_reading;
float voltage;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(ldr, INPUT);
  pinMode(led, OUTPUT);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  analog_reading = analogRead(ldr);
  voltage = (analog_reading * 3.3) / 4095;
  if (analog_reading > 1500) {
    digitalWrite(led, HIGH); 
  } else if (analog_reading < 1500) {
   digitalWrite(led, LOW);
  }
  Serial.print("Analog reading: " + String(analog_reading));
  Serial.println(", Voltage" + String(voltage));
  delay(1000);
}