// Fab Academy 2023 - Fab Lab León
// PIR sensor or Doppler radar
// Fab-Xiao

const int RadarPin = D0; // Digital input pin (RP2040 pin 26 or ESP32-C3 pin D0)
const int LED_PIN = D1;  // LED output pin

void setup() {
    Serial.begin(115200);  // Initialize serial communication
    pinMode(RadarPin, INPUT); // Set radar/PIR pin as input
    pinMode(LED_PIN, OUTPUT); // Set LED pin as output
    digitalWrite(LED_PIN, LOW); // Ensure LED is off initially
}

void loop() {
    int value = digitalRead(RadarPin); // Read the value from the sensor (0 or 1)

    if (value == HIGH) {
        digitalWrite(LED_PIN, HIGH); // Turn LED ON when motion detected
        Serial.println("Motion detected!");
    } else {
        digitalWrite(LED_PIN, LOW); // Turn LED OFF when no motion
        Serial.println("No motion.");
    }

    delay(50); // Small delay to avoid excessive readings
}