Smart Lock

Bluetooth-enabled smart door lock with secure access control, supporting mobile app unlocking, guest access codes, and activity logging.

Category: Smart Home

Bluetooth-enabled smart door lock with secure access control, supporting mobile app unlocking, guest access codes, and activity logging.

Key Features

Secure BLE pairing
NFC tap-to-unlock
Access code management
Activity audit log
Battery monitoring
Tamper detection

Firmware Components

BLE security (LESC)
Motor/actuator driver
Crypto engine
NVS for access credentials
Low-power state machine
NFC reader driver

Protocols

ble, nfc

Recommended Hardware

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.

nRF52833

Full-featured BLE 5.4 + 802.15.4 SoC with 512KB Flash, 128KB RAM, USB, and NFC. Offers extended-range BLE (Coded PHY) and mid-range capability between nRF52832 and nRF52840.

nRF52840

Advanced multiprotocol SoC with 1MB Flash, 256KB RAM, and USB support. The go-to chip for Bluetooth 5.4, Thread, Zigbee, and 802.15.4 applications.

nRF5340

Dual-core Bluetooth 5.4 SoC with dedicated application and network processors. 1MB Flash + 512KB RAM on the application core, with hardware security via ARM TrustZone.

Ready-Made Solution Recipes

nRF52840 Smart Lock

Build a secure BLE smart door lock with the nRF52840 — featuring encrypted pairing, NFC tap-to-unlock, guest access management, and tamper detection.

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.

nRF54L15 Secure Smart Lock

Build a next-generation secure smart lock with the nRF54L15 — CRACEN hardware crypto for secure BLE key management, tamper detection peripherals, and years of battery life on 2xAA cells.