//ใช้ LDR 
int ldr_analog = A0;
int ldr_digital = 2;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ldr_analog, INPUT);
pinMode(ldr_digital, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int analog_val = analogRead(A0);
int digital_val = digitalRead(2);
Serial.println(analog_val);
Serial.println(digital_val);
delay(1000);
}