D12 Internet‑Enabled Smart Lock [All‑Network 4G‑Cat.1] – Open API, SDK, and Remote Provisioning for Smart Door Locks, NB‑IoT Fingerprint Locks, and Secondary Development
“Bluetooth + Password + Swipe Card + Fingerprint + ID Card” Networked Lock Solution
1. Access methods: Bluetooth app, password, swipe card, fingerprint, mechanical key;
2. Supports centralized fingerprint enrollment and authorization distribution;
3. Can monitor battery level and, via the network, promptly transmit real-time battery‑level alarm data to prompt battery replacement;
4. The lock employs BLE 4.2 combined with full‑network Cat.1 wireless connectivity technology;
5. Supports operation on AA batteries and includes a USB emergency power interface;
6. Offline operating mode: In the event of an unexpected network outage, the lock can continue to function offline without affecting authorized users’ normal access;
7. Local storage: The lock locally stores at least 1,000 offline swipe records, which are automatically uploaded to the management platform as soon as communication is restored;
8. Each lock can store access permissions for at least 100 users;
9. All functional interfaces are provided free of charge, enabling integration with the school’s application platform to achieve lock control and management through the platform;
10. Material: Outer layer of 304 stainless steel, inner layer of high‑quality steel plate; dimensions: 350 × 75 × 28 mm.
Product Introduction
“Bluetooth + Password + Swipe Card + Fingerprint + ID Card” Networked Lock Solution
1. Access methods: Bluetooth app, password, swipe card, fingerprint, mechanical key;
2. Supports centralized fingerprint enrollment and authorization distribution;
3. Can monitor battery level and, via the network, promptly transmit real-time battery‑level alarm data to prompt battery replacement;
4. The lock employs BLE 4.2 combined with full‑network Cat.1 wireless connectivity technology;
5. Supports operation on AA batteries and includes a USB emergency power interface;
6. Offline operating mode: In the event of an unexpected network outage, the lock can continue to function offline without affecting authorized users’ normal access;
7. Local storage: The lock locally stores at least 1,000 offline swipe records, which are automatically uploaded to the management platform as soon as communication is restored;
8. Each lock can store access permissions for at least 100 users;
9. All functional interfaces are provided free of charge, enabling integration with the school’s application platform to achieve lock control and management through the platform;
10. Material: Outer layer of 304 stainless steel, inner layer of high‑quality steel plate; dimensions: 350 × 75 × 28 mm.











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