const int tiltPin = D2;
unsigned long lastPublish = 0;
const unsigned long PUBLISH_INTERVAL = 2000;  
const unsigned long SHAKE_WINDOW = 2000;      
const int SHAKE_THRESHOLD = 10;                

int lastState = 0;
int stateChanges = 0;
unsigned long windowStart = 0;

void setup() {
    Serial.begin(115200);
    pinMode(tiltPin, INPUT_PULLUP);
    windowStart = millis();
}

void loop() {
    int currentState = digitalRead(tiltPin);
    unsigned long currentTime = millis();
    
    if (currentState != lastState) {
        stateChanges++;
        lastState = currentState;
        Serial.print("State change: ");
        Serial.println(stateChanges);
    }
    
    if (currentTime - windowStart >= SHAKE_WINDOW) {
        bool isShaking = (stateChanges >= SHAKE_THRESHOLD);
        
        if (currentTime - lastPublish >= PUBLISH_INTERVAL) {
            String data = String(isShaking ? "1" : "0");
            Particle.publish("shake-detect", data, PRIVATE);
            Serial.print("Shake detected: ");
            Serial.println(isShaking ? "YES" : "NO");
            lastPublish = currentTime;
        }
        
        stateChanges = 0;
        windowStart = currentTime;
    }
    
    delay(10);  
}