#define PIN_ANALOG 7
#define PIN_LED 8

void setup() {
  SerialUSB.begin(115200);
  pinMode(PIN_ANALOG, INPUT);
  pinMode(PIN_LED, OUTPUT);
}

void loop() {
  int analogValue = analogRead(PIN_ANALOG);
  SerialUSB.println(analogValue); 

  digitalWrite(PIN_LED, analogValue > 550 ? HIGH : LOW);
  delay(30);
}