// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
pinMode(12, OUTPUT);
Serial.begin(9600);
}
// the loop function runs over and over again forever
void loop() {
/*digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(12, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
digitalWrite(12, HIGH); // turn the LED off by making the voltage LOW
delay(1000);
digitalWrite(LED_BUILTIN, LOW);
delay(1000); */ // wait for a second
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
float voltage = sensorValue * (5.0 / 1023.0);
// print out the value you read:
Serial.println(voltage);
if (voltage > 4){
digitalWrite(LED_BUILTIN, HIGH);
digitalWrite(12, LOW);
} else{
digitalWrite(LED_BUILTIN, LOW);
digitalWrite(12, HIGH);
}
}