Sensor onboarding screens:
- add-sensor.tsx: BLE scanning + device selection
- setup-wifi.tsx: WiFi credentials + ESP32 provisioning
Flow:
1. Scan for nearby sensors via BLE
2. Select device from list
3. Enter WiFi credentials (SSID + password)
4. Send config over BLE using ESP IDF provisioning protocol
5. Verify connection and activate in backend
ESP Provisioning:
- services/espProvisioning.ts: ESP32 BLE provisioning implementation
- Protocol: custom-data exchange via BLE characteristics
- Security: WiFi password encrypted over BLE
- Timeout handling: 30s for provisioning, 60s for activation
User experience:
- Clear step-by-step wizard UI
- Loading states for BLE operations
- Success/error feedback
- Navigation to equipment screen on success
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