#define SENSOR A1
#define LED 3
int value = 1;

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(SENSOR, INPUT);
  Serial.begin(9600);

}

void loop() {
  value = analogRead(SENSOR);
  if (value > 853) {
    digitalWrite(LED, HIGH); 
    Serial.println("ТЕМНО " + String(value));
  }
  if (value < 853) {
    digitalWrite(LED, LOW);
    Serial.println( "СВЕТЛО " + String(value));
  }
    delay(500);


}