LANE TECH PCL - DoorForce Tracker

#include "Particle.h"
#include <Wire.h>
#include <MPU6050.h>

SYSTEM_MODE(AUTOMATIC);

MPU6050 mpu;
int16_t ax, ay, az;
float ax_offset = -2350;
float ay_offset = 14000;
float az_offset = 2000;
const float SENS = 2048.0;
const float THRESHOLD = 3.0;
const unsigned long COOLDOWN = 1000;
unsigned long lastEvent = 0;

void setup() {
    Serial.begin(9600);
    Wire.begin();
    mpu.initialize();

    if (!mpu.testConnection()) {
        Serial.println("MPU6050 connection failed!");
        while (1);
    }

    Serial.println("MPU6050 ready.");
}

void loop() {
    mpu.getAcceleration(&ax, &ay, &az);

    float x = ((float)ax - ax_offset) / SENS;
    float y = ((float)ay - ay_offset) / SENS;
    float z = ((float)az - az_offset) / SENS;

    Serial.printf("X=%.1f  Y=%.1f  Z=%.1f\n", x, y, z);

    if ((fabs(x) >= THRESHOLD || fabs(z) >= THRESHOLD) &&
        (millis() - lastEvent > COOLDOWN)) {

        String direction;
        float value;

        if (fabs(x) >= THRESHOLD) {
            direction = "X";
            value = x;
        } else {
            direction = "Z";
            value = z;
        }

        String data = String::format("{\"direction\":\"%s\",\"value\":%.2f}", direction.c_str(), value);

        Particle.publish("door_slam_event", data, PRIVATE);
        Serial.println("⚠️ Event published: " + data);

        lastEvent = millis();
    }

    delay(250);
}