first commit

Particle/main.ino

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+#include "Particle.h"
+
+// Ultra low power system settings for Boron LTE
+SYSTEM_MODE(MANUAL);  // Manual control over cellular connection
+SYSTEM_THREAD(ENABLED);
+
+// Pin definitions for Boron
+const int MICROSWITCH_PIN = D2;  // Microswitch (NC - normally closed)
+const int ALARM_PIN = D3;        // Alarm output
+const int STATUS_LED = D7;       // Built-in LED for status
+
+// Ultra low power settings for LTE Boron
+const unsigned long DAILY_BATTERY_REPORT = 86400; // 24 hours in seconds
+const unsigned long ALARM_DURATION = 10000;       // 10 seconds alarm duration
+const unsigned long CELLULAR_TIMEOUT = 60000;     // 60 seconds to connect to cellular
+const unsigned long PUBLISH_TIMEOUT = 30000;      // 30 seconds to publish
+
+// Persistent state (survives STOP mode sleep)
+retained unsigned long lastBatteryReport = 0;
+retained unsigned long bootCount = 0;
+retained bool deviceInitialized = false;
+retained float lastReportedBattery = 100.0;
+
+// Wake up reasons for Boron
+enum BoronWakeReason {
+    WAKE_SECURITY_BREACH,  // Microswitch triggered
+    WAKE_DAILY_REPORT,     // Daily battery check
+    WAKE_COLD_START        // Power on/reset
+};
+
+// Function prototypes
+BoronWakeReason determineWakeReason();
+void handleSecurityBreach();
+void handleDailyReport();
+void handleColdStart();
+void activateSecurityAlarm();
+void maintainAlarmDuration();
+bool connectToCellular();
+void publishSecurityAlert(String alertData);
+String createSecurityAlert();
+String createBatteryReport(float batteryLevel);
+String createStartupAlert();
+void flashStatusLED(int count, int duration);
+void enterUltraLowPowerSleep();
+
+void setup() {
+    bootCount++;
+    
+    // Initialize pins immediately for security
+    pinMode(MICROSWITCH_PIN, INPUT_PULLUP);  // Pullup for NC switch
+    pinMode(ALARM_PIN, OUTPUT);
+    pinMode(STATUS_LED, OUTPUT);
+    
+    // Ensure alarm starts OFF
+    digitalWrite(ALARM_PIN, LOW);
+    digitalWrite(STATUS_LED, LOW);
+    
+    // Determine why we woke up
+    BoronWakeReason wakeReason = determineWakeReason();
+    
+    // Handle based on wake reason
+    switch (wakeReason) {
+        case WAKE_SECURITY_BREACH:
+            handleSecurityBreach();
+            break;
+        case WAKE_DAILY_REPORT:
+            handleDailyReport();
+            break;
+        case WAKE_COLD_START:
+            handleColdStart();
+            break;
+    }
+    
+    // Always go back to ultra low power sleep
+    enterUltraLowPowerSleep();
+}
+
+void loop() {
+    // Should never reach here in ultra low power mode
+    // If we do, go to sleep immediately
+    enterUltraLowPowerSleep();
+}
+
+BoronWakeReason determineWakeReason() {
+    // Check if microswitch is open (security breach)
+    // NC switch: HIGH = closed (normal), LOW = open (breach)
+    bool switchOpen = (digitalRead(MICROSWITCH_PIN) == LOW);
+    
+    if (switchOpen) {
+        return WAKE_SECURITY_BREACH;
+    }
+    
+    // Check if it's time for daily battery report
+    unsigned long currentTime = Time.now();
+    if (deviceInitialized && (currentTime - lastBatteryReport) >= DAILY_BATTERY_REPORT) {
+        return WAKE_DAILY_REPORT;
+    }
+    
+    // Must be a cold start (power on, reset, or first boot)
+    return WAKE_COLD_START;
+}
+
+void handleSecurityBreach() {
+    // IMMEDIATE ALARM ACTIVATION (before any network activity)
+    activateSecurityAlarm();
+    
+    // Status indication
+    flashStatusLED(5, 100); // 5 rapid flashes
+    
+    // Now connect and send alert
+    if (connectToCellular()) {
+        String alertData = createSecurityAlert();
+        publishSecurityAlert(alertData);
+        
+        // Brief delay to ensure message is sent
+        delay(5000);
+    }
+    
+    // Keep alarm on for full duration even if network fails
+    maintainAlarmDuration();
+    
+    // Turn off alarm
+    digitalWrite(ALARM_PIN, LOW);
+}
+
+void handleDailyReport() {
+    // Quick status blink
+    flashStatusLED(2, 200);
+    
+    // Connect and send daily battery report
+    if (connectToCellular()) {
+        float currentBattery = System.batteryCharge();
+        String reportData = createBatteryReport(currentBattery);
+        publishSecurityAlert(reportData);
+        
+        // Update tracking
+        lastBatteryReport = Time.now();
+        lastReportedBattery = currentBattery;
+        
+        delay(3000); // Ensure transmission completes
+    }
+}
+
+void handleColdStart() {
+    // Device just powered on or reset
+    deviceInitialized = false;
+    
+    // Startup indication (3 slow blinks)
+    flashStatusLED(3, 500);
+    
+    if (connectToCellular()) {
+        String startupData = createStartupAlert();
+        publishSecurityAlert(startupData);
+        
+        // Initialize tracking
+        deviceInitialized = true;
+        lastBatteryReport = Time.now();
+        lastReportedBattery = System.batteryCharge();
+        
+        delay(3000);
+    }
+}
+
+void activateSecurityAlarm() {
+    // IMMEDIATE alarm activation - highest priority
+    digitalWrite(ALARM_PIN, HIGH);
+    digitalWrite(STATUS_LED, HIGH);
+    
+    // Quick beep pattern to confirm activation
+    // (Remove if you don't want any delay before network connection)
+    for (int i = 0; i < 3; i++) {
+        delay(100);
+        digitalWrite(STATUS_LED, LOW);
+        delay(100);
+        digitalWrite(STATUS_LED, HIGH);
+    }
+}
+
+void maintainAlarmDuration() {
+    // Keep alarm on for specified duration
+    unsigned long alarmStart = millis();
+    
+    while (millis() - alarmStart < ALARM_DURATION) {
+        // Flash status LED while alarm is active
+        digitalWrite(STATUS_LED, HIGH);
+        delay(250);
+        digitalWrite(STATUS_LED, LOW);
+        delay(250);
+        
+        // Check if switch closed again (breach ended)
+        if (digitalRead(MICROSWITCH_PIN) == HIGH) {
+            // Switch closed again - could end alarm early
+            // Comment out next line if you want fixed duration regardless
+            // break;
+        }
+    }
+}
+
+bool connectToCellular() {
+    unsigned long startTime = millis();
+    
+    // Status indication - connecting
+    digitalWrite(STATUS_LED, HIGH);
+    
+    // Enable cellular radio
+    Cellular.on();
+    
+    // Connect to Particle cloud via cellular
+    Particle.connect();
+    
+    // Wait for connection with timeout
+    while (!Particle.connected() && (millis() - startTime) < CELLULAR_TIMEOUT) {
+        Particle.process();
+        
+        // Blink during connection attempt
+        digitalWrite(STATUS_LED, (millis() / 500) % 2);
+        delay(100);
+    }
+    
+    bool connected = Particle.connected();
+    
+    // Status indication
+    if (connected) {
+        // Success - solid LED for 1 second
+        digitalWrite(STATUS_LED, HIGH);
+        delay(1000);
+    } else {
+        // Failed - rapid blinks
+        flashStatusLED(10, 50);
+    }
+    
+    digitalWrite(STATUS_LED, LOW);
+    return connected;
+}
+
+void publishSecurityAlert(String alertData) {
+    if (!Particle.connected()) {
+        return;
+    }
+    
+    // Try to publish with retries
+    for (int attempts = 0; attempts < 3; attempts++) {
+        bool success = Particle.publish("Security Alert", alertData, PRIVATE);
+        
+        if (success) {
+            // Success indication
+            flashStatusLED(2, 100);
+            break;
+        } else {
+            // Retry indication
+            flashStatusLED(1, 50);
+            delay(2000);
+        }
+    }
+    
+    // Allow time for message to be sent
+    unsigned long publishStart = millis();
+    while (millis() - publishStart < PUBLISH_TIMEOUT) {
+        Particle.process();
+        delay(100);
+    }
+}
+
+String createSecurityAlert() {
+    float batteryLevel = System.batteryCharge();
+    CellularSignal signal = Cellular.RSSI();
+    
+    String alertData = String::format(
+        "Type:SECURITY_BREACH|Desc:Microswitch opened - INTRUDER DETECTED|Batt:%.1f%%|Signal:%d|Quality:%d|Boot:%lu|Alarm:ON",
+        batteryLevel,
+        signal.getStrength(),
+        signal.getQuality(),
+        bootCount
+    );
+    
+    return alertData;
+}
+
+String createBatteryReport(float batteryLevel) {
+    CellularSignal signal = Cellular.RSSI();
+    
+    String alertType;
+    String description;
+    
+    if (batteryLevel <= 10.0 && batteryLevel > 0) {
+        alertType = "CRITICAL_BATTERY";
+        description = String::format("CRITICAL: Battery at %.1f%% - Device may shutdown soon", batteryLevel);
+    } else if (batteryLevel <= 20.0) {
+        alertType = "LOW_BATTERY";
+        description = String::format("LOW: Battery at %.1f%% - Consider servicing", batteryLevel);
+    } else {
+        alertType = "DAILY_BATTERY_REPORT";
+        description = String::format("Daily report: Battery at %.1f%%, operating normally", batteryLevel);
+    }
+    
+    String alertData = String::format(
+        "Type:%s|Desc:%s|Batt:%.1f%%|Signal:%d|Quality:%d|Boot:%lu|Days:%lu",
+        alertType.c_str(),
+        description.c_str(),
+        batteryLevel,
+        signal.getStrength(),
+        signal.getQuality(),
+        bootCount,
+        (Time.now() - lastBatteryReport) / 86400
+    );
+    
+    return alertData;
+}
+
+String createStartupAlert() {
+    float batteryLevel = System.batteryCharge();
+    CellularSignal signal = Cellular.RSSI();
+    
+    String description = String::format(
+        "Device startup - Boot #%lu, Battery: %.1f%%, Ready for security monitoring",
+        bootCount,
+        batteryLevel
+    );
+    
+    String alertData = String::format(
+        "Type:DEVICE_STARTUP|Desc:%s|Batt:%.1f%%|Signal:%d|Quality:%d|Firmware:1.0.0",
+        description.c_str(),
+        batteryLevel,
+        signal.getStrength(),
+        signal.getQuality()
+    );
+    
+    return alertData;
+}
+
+void flashStatusLED(int count, int duration) {
+    for (int i = 0; i < count; i++) {
+        digitalWrite(STATUS_LED, HIGH);
+        delay(duration);
+        digitalWrite(STATUS_LED, LOW);
+        delay(duration);
+    }
+}
+
+void enterUltraLowPowerSleep() {
+    // Disconnect from cellular to save maximum power
+    if (Particle.connected()) {
+        Particle.disconnect();
+        delay(2000); // Give time to disconnect cleanly
+    }
+    
+    // Turn off cellular radio completely
+    Cellular.off();
+    
+    // Turn off status LED
+    digitalWrite(STATUS_LED, LOW);
+    
+    // Configure ultra low power sleep for Boron
+    SystemSleepConfiguration config;
+    config.mode(SystemSleepMode::STOP)  // STOP mode for Boron (supports RTC wake)
+          .gpio(MICROSWITCH_PIN, FALLING)  // Wake on switch opening (NC switch goes LOW)
+          .duration(24h);  // Wake once per day for battery report
+    
+    // Enter sleep - device will wake on pin interrupt OR after 24 hours
+    SystemSleepResult result = System.sleep(config);
+    
+    // When we wake up, setup() will run again to handle the wake reason
+}
+
+// Optional: Handle system events for debugging
+void onCellularConnect() {
+    // Cellular connected
+    flashStatusLED(1, 200);
+}
+
+void onCellularDisconnect() {
+    // Cellular disconnected
+    flashStatusLED(2, 100);
+}
+
+// Uncomment for debugging (will increase power consumption)
+// STARTUP(cellular.on());
+// SYSTEM(SYSTEM_MODE(SEMI_AUTOMATIC));