┌──────────────────────────────────────────────────────────────–──┐
│                           DEEP SLEEP                            │
│  - ESP32 off except EXT0/EXT1 interrupts                        │
│  - Accelerometer interrupt armed                                │
│  - Fingerprint sensor interrupt armed                           │
│  - GPS always powered                                           │
│  - OLED powered down or in sleep mode                           │
│  - System armed/disarmed stored in RTC memory                   │
└───────────────────────────────────────────────────────────────–─┘
                      |                  |
      Accelerometer interrupt       Fingerprint interrupt
                      |                  |
                      v                  v
┌──────────────────────────────────────────────────────────────–––──┐
│                         WAKE INITIAL                              │
│  Immediately on wake:                                             │
│    - Turn on and init OLED                                        │
│    - Determine wake source (ACC or Fingerprint)                   │
│    - Begin 20-second awake timer                                  │
│    - Obtain initial GPS fix                                       │
│    - Read armed/disarmed status from RTC memory                   │
│    - Start periodic GPS check timer                               │
└──────────────────────────────────────────────────────────────–──––┘
                      |
                      v
┌──────────────────────────────────────────────────────────────––──┐
│                 NORMAL AWAKE MONITORING MODE                     │
│  System remains awake for 20 seconds unless extended:            │
│                                                                  │
│  During this time:                                               │
│    - Read accelerometer events                                   │
│       → Record last motion detected                              │
│                                                                  │
│    - Read fingerprint sensor activity                            │
│       → If system DISARMED:                                      │
│           • Allow enrollment / owner verification menus          │
│           • Reset timer if interacting                           │
│       → If system ARMED:                                         │
│           • Only allow owner verification (no enrollment menu)   │
│           • Reset timer if interacting                           │
│                                                                  │
│    - GPS Movement Check Before Sleep                             │
│         • Obtain new GPS coordinates                             │
│         • Compute distance from baseline                         │
│         • If distance > movementThreshold AND system ARMED       │
│             → Sound the Alarm                                    │
│                                                                  │
│                                                                  │
│  If timer expires with no activity and no movement:              │
│       → Transition to GOING TO SLEEP                             │
└──────────────────────────────────────────────────────────────––──┘
                      |
                      | (Movement detected > threshold AND ARMED)
                      v
┌──────────────────────────────────────────────────────────────––––──┐
│                          ALARM MODE                                │
│  Triggered when GPS confirms actual movement and system ARMED.     │
│                                                                    │
│  Actions:                                                          │
│    - isAlarming = true                                             │
│    - Send “THEFT ALERT” to Adafruit IO                             │
│    - Start fast GPS reporting (every 2s)                           │
│    - Flash OLED warning screen                                     │
│    - Trigger audible alarm                                         │
│                                                                    │
│  Behavior:                                                         │
│    - Device stays awake for 20s                                    │
│    - Continues GPS updates until system is reset or owner verifies │
│                                                                    │
│    - If fingerprint owner verifies identity:                       │
│          → Clear theftModeActive                                   │
│          → Remain in NORMAL AWAKE MONITORING MODE                  │
└──────────────────────────────────────────────────────────────––──––┘

                      |
                      | (20s timeout, no motion, no activity)
                      v
┌──────────────────────────────────────────────────────────────––──┐
│                         GOING TO SLEEP                           │
│  Actions prior to deep sleep:                                    │
│    - Put OLED into sleep mode or power it down                   │
│    - Clear accelerometer interrupt latch                         │
│    - Ensure fingerprint sensor is idle                           │
│    - Save RTC variables (awakeStart, timestamps, armed status)   │
│    - Reconfigure EXT0/EXT1 wakeup pins                           │
│                                                                  │
│  → Enter deep sleep                                              │
└──────────────────────────────────────────────────────────────––──┘

                      |
                      v
                 Back to DEEP SLEEP