Button / RTC-Wakeup Capture and Upload Flow

Full Flow Chart

Key Functions

Button capture path

• device_service.c: single_press_callback() - button callback while running
• system_service.c: handle_wakeup_event(WAKEUP_SOURCE_BUTTON) - button handling on wakeup
• system_service.c: default_capture_callback(CAPTURE_TRIGGER_BUTTON) - button-triggered callback

RTC wakeup capture path

• system_service.c: system_service_process_wakeup_event() - process wakeup events
• system_service.c: handle_wakeup_event(WAKEUP_SOURCE_RTC) - RTC wakeup handling
• system_service.c: wakeup_task_async() - asynchronous wakeup task

Unified upload flow

• system_service.c: system_service_capture_and_upload_mqtt() - core upload function
  • Step 1: capture (fast / standard)
  • Step 1.1: SD card storage (optional)
  • Step 2: prepare metadata
  • Step 3: prepare AI result (optional)
  • Step 3.1: check MQTT network connection
  • Step 4: MQTT upload (single / chunked)
  • Step 5: release buffers
  • Step 6: wait for publish confirmation

Parameter Differences

Trigger	enable_ai	chunk_size	store_to_sd	Capture API
Button capture (while running)	configurable	configurable	configurable	standard
Button capture (from wakeup)	TRUE	0	TRUE	fast
RTC wakeup capture	TRUE	0	TRUE	fast