Bluetooth Lock

Last Updated on : 2024-06-21 03:39:24download

A Bluetooth lock is integrated with a Bluetooth module or Bluetooth chip to enable internet connection.

Solution description

Tuya’s Bluetooth lock solutions support two types of connection.

Point-to-point: A Bluetooth lock exchanges data with a mobile phone via a short-range connection.
Bluetooth gateway: A Bluetooth lock can connect to a mobile phone within a short range and to the cloud through a gateway.

Both connection types require integration with the Tuya Bluetooth lock protocol. There are two options to achieve this purpose.

MCU integration: Interface the lock’s MCU with a Bluetooth module through the serial port so that the MCU can connect to the Tuya-based mobile app and the cloud, as well as report device status.
SDK integration: Tuya provides SDKs based on Beken or Nordic chips. You can perform custom development on top of the SDK.

These two integration methods are performed on the device side with different protocols.

Architecture

MCU Integration
SDK integration

Features

Tuya Bluetooth lock solution supports the following features.

Feature	Description
End-to-end encryption	Data is encrypted and secured when it travels across the mobile app, server, and Bluetooth module.
Unlocking record	An unlocking record contains the unlocking method, unlocking ID, and unlocking time. The user can check the unlocking records for the last 6 months from the mobile app. A combination of unlocking methods is supported, such as fingerprint plus password.
Cache unlocking records	Cache the unlocking records on the Bluetooth module or chip and synchronize them with the mobile app when the lock connects to it.
Alert	An alert is sent to the user in any of these cases: low battery, wrong attempts by passwords, fingerprints, or cards, prying lock, and high temperature.
Time synchronization	Synchronize the clock on the lock with a time server. Global time zones and daylight saving time (DST) are supported.
Member management	The user can add lock members using the mobile app.
Battery level	Display battery percentage or status.
Unlock via mobile app	The user can unlock the door using the mobile app when the mobile phone is connected to the lock over Bluetooth.
Dynamic password	The Bluetooth module is integrated with dynamic password algorithms. The user can get dynamic passwords that are valid for five minutes using the mobile app.
Add unlocking methods	When connected to the lock via Bluetooth, the mobile app allows the user to add or delete unlocking methods, such as fingerprints, cards, and passwords.
Temporary password	If the hardware supports local RTC, the lock administrator can set a validity period and temporary password for non-home member users. However, the validity period and temporary password do not apply to home member users.
Validity period	The lock administrator can specify the validity period of a user on the mobile app.
OTA update	Update the firmware on the module and the MCU via OTA.
Offline temporary password	The offline temporary password does not rely on an internet connection. The algorithms are implemented by the module and the cloud. The MCU calls the specified API to verify the temporary password.
Lock status	The user can check the lock status on the mobile app, such as double lock and child lock.
Auto-locking	Enable or disable auto-locking.
Auto-locking delay	The user can set the time before the lock gets locked.
Synchronize unlocking methods	When directly connected to the mobile app, the lock synchronizes the unlocking methods with the cloud.
Voice commands	The mobile app sends the collected voice commands to the lock.

Product creation

The Bluetooth lock solution supports the following categories.

Category	Description
Bluetooth residential lock	It is the standard Bluetooth lock solution, with a full set of smart lock features that can be tailored to your needs.
Bluetooth safe box	Support Bluetooth safe box solution.
Bluetooth lock accessory	Apply to common lock accessories such as key fobs and password panels.
Bluetooth small lock	Apply to cabinet locks, U-locks, and key boxes.

Process

Overall process

Register with Tuya Developer Platform > Create product > Define functions > Select panel > Select module > Configure hardware > Configure extended features
Create residential lock

Choose Smart Locks > Residential Lock and then Bluetooth for Protocol.
Create safe box

Choose Smart Locks > Safe Box and then Bluetooth for Protocol.

Data point (DP) reference

Product development

Module selection

TYBN1 module is recommended for Bluetooth lock solutions.

Software integration	Hardware integration	Model	Firmware key	Version	State	Description
MCU integration	Module	TYBN1	keyxwmm8	6.1	Released	Base version
MCU integration	Chip	BK3431Q	keyktpaa	3.3	Released	Base version
SDK integration	Chip	nRF52832	\	1.4	Unreleased	Support integration with Amazon Alexa and Google Assistant as well as offline passwords.
SDK integration	Chip	BK3431Q	\	1.4	Unreleased	Support integration with Amazon Alexa and Google Assistant as well as offline passwords.

Product development

For more information about the development process, key steps, and important DPs, see the following documentation.

MCU integration protocol

For more information about the generic communication and data protocol, see the following documentation.

Bluetooth Lock DP Reference
Serial Communication Protocol

You can download the latest protocol after you select the module for your product on the Tuya Developer Platform.

Voice assistant

Bluetooth locks support unlocking with third-party voice assistants, which is available in the Smart Life app v3.17 or later.

Third-party voice assistants	Supported feature
Unlock with Alexa commands	Unlock, lock, query unlocking/locking status, and return a voice response after unlocking/locking is executed.

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