tilt_detector.ino

// code reference:
// https://www.instructables.com/Arduino-Tilt-Sensor-Tutorial-Interfacing-Tilt-Ball/


int ledPin = 12;
int sensorPin = 4;
int sensorValue;
int lastTiltState = HIGH; // the previous reading from the tilt sensor

// the following variables are long's because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long lastDebounceTime = 0; // the last time the output pin was toggled
long debounceDelay = 50; // the debounce time; increase if the output flickers


void setup(){
    pinMode(sensorPin, INPUT);
    digitalWrite(sensorPin, HIGH);
    pinMode(ledPin, OUTPUT);
    Serial.begin(9600);
}


void loop(){
    sensorValue = digitalRead(sensorPin);
    // If the switch changed, due to noise or pressing:
    if (sensorValue == lastTiltState) {
        // reset the debouncing timer
        lastDebounceTime = millis();
    }
    if ((millis() - lastDebounceTime) > debounceDelay) {
        // whatever the reading is at, it's been there for longer
        // than the debounce delay, so take it as the actual current state:
        lastTiltState = sensorValue;
    }
    digitalWrite(ledPin, lastTiltState);
    
    Serial.println(sensorValue);
    delay(50); // Erin edit: this was 500 before, changed to make faster reaction to tilt
}