The SN-9243 Bluetooth Door Lock Module utilizes the Tailing Micro 8251 Bluetooth chip as its main controller, supporting Low Energy Bluetooth (BLE 5.0). It allows for door lock management (electronic keys) and unlocking via an app. The door lock supports firmware upgrades, enabling expansion of software functions. The app's electronic key feature allows for setting specific validity periods (start time - end time), enabling unlocking within that timeframe. Bluetooth Mobile Phone Unlocking - Based on Low Energy Bluetooth technology, it can be easily unlocked via a mobile phone APP. Remote Electronic Key Distribution - Electronic keys can be sent to tenants at any time, with flexible setting of validity periods for each key, or the ability to freeze/unfreeze electronic keys. Unlocking Records and Monitoring - APP unlocking maintains records. After any mobile phone APP uses the door lock, connects, and synchronizes information, all unlocking records can be viewed on the administrator's APP. Remote Control - Supports adding TTLOCK remote control R1 and gateway G2. After connecting to the G2 gateway, it can be remotely unlocked from anywhere via WIFI and supports third-party smart platforms like Alexa and Google Assistant for remote unlocking control, etc. The SN-9243 Bluetooth Door Lock Module is used to convert old electric door locks into smart locks for ttlock app unlocking. Features: 1. Factory Reset 2. Add Mobile Phone Administrator 3. Remove Mobile Phone Administrator 4. Unlock 5. Lock 6. App Key 7. View Unlocking Records 8. Low Power Prompt 9. Firmware Upgrade Interface: The open platform provides OpenAPI for integration with business management systems, enabling association between residences and door locks, sending electronic keys, sending passwords, viewing lock records, and other door lock management functionalities.