nRF52820 Smart Lock with USB
Build a BLE and USB-enabled smart door lock with the nRF52820 — combining secure BLE access control with USB connectivity for configuration, audit log download, and firmware updates.
Build a BLE and USB-enabled smart door lock with the nRF52820 — combining secure BLE access control with USB connectivity for configuration, audit log download, and firmware updates.
Platform: nRF52820
BLE 5.4 and 802.15.4 SoC with USB 2.0 Full Speed and 256KB Flash. Bridges BLE/Thread wireless with USB at lower cost than the nRF52840.
Use Case: Smart Lock
Bluetooth-enabled smart door lock with secure access control, supporting mobile app unlocking, guest access codes, and activity logging.
Why This Combination
The nRF52820 uniquely pairs BLE 5.4 with USB 2.0 at a lower cost than the nRF52840, making it well-suited for smart locks that need both mobile BLE unlocking and USB-based maintenance access.
Key Protocols
ble, usb
What FirmwareMaestro Generates
For this solution, FirmwareMaestro produces a complete project package:
- Product Requirements (PRD)
- Firmware Architecture
- Hardware Abstraction Layer (HAL) design
- State Machine specification
- Code Scaffold (
main.c,prj.conf,CMakeLists.txt,Kconfig) - Devicetree overlay for the target board
- AI-pair-programming
.cursorrules - Build and flash instructions
See the Code Scaffolds guide for details.
nRF52805 Wireless Remote
Build the smallest possible BLE remote control with the nRF52805 — HID-over-GATT button and joystick input with ultra-compact PCB footprint and coin-cell power.
nRF52811 Thread Lighting Controller
Build a Thread-enabled smart lighting controller with the nRF52811 — mesh-networked LED dimming and color control with Matter compatibility at a cost-optimized price point.