Electronic lock CH4 Tuya Smart encryption
The CH4 Tuya Smart electronic lock from Spreest brand is a modern and intuitive solution that provides convenient access control to your home or business.
The device supports Wiegand 26–44 bit communication standards (input and output), allowing it to be integrated with various access control systems.
It can operate both as a standalone access controller and an external RFID reader cooperating with a master controller via the Wiegand 26–44 bit interface.
It is ideal for short-term rentals, offices, warehouses, or service points, where quick and controlled access without the owner's presence is crucial.
In a few seconds, you can grant a guest access with a one-time code, give an employee access only for specific hours, and check every attempt to open in the history – all from the app.
The robust construction and IP68 waterproof rating allow for outdoor installation – on doors or building facades, and the backlit LED panel enables convenient use even after dark.
Thanks to integration with the Tuya Smart app, you can manage access remotely via Wi-Fi – quickly, conveniently, and securely.
Unlocking Methods
- Tuya Smart mobile app – The lock opens with one click on your phone.
- PIN code – Allows quick door opening using an individual access code.
- 125 kHz ID card – A convenient way to access by swiping a compatible card or fob.
- Card + PIN – Enhanced security mode where both a card and an assigned PIN code are required to open.
Tuya Smart App
- Event history – Check the full history of openings with date, time, and authorization method.
- Access codes – Create permanent, one-time, and cyclical PIN codes tailored to the needs of residents, employees, or guests.
- Remote unlocking – Open the door from the app from anywhere by enabling the Remote Unlock function.
- User management – Add administrators and regular users and assign them individual access methods.
- RFID cards and PIN codes – Easily add or remove RFID cards and PIN codes assigned to specific users.
- Access schedules – Grant access only on specific days of the week and hours with cyclical temporary codes.
- Access reports – Export opening history to an Excel (.xlsx) file and analyze user activity.
- Wi-Fi management – Control the device from the app via a 2.4 GHz Wi-Fi network.
- Quick setup – Add the device to the app in a few steps using Bluetooth and Wi-Fi.
Lock Components
- Signal diode
- Touch panel (backlit)
- RFID reader
- Doorbell
- Cables
- Mounting holes
Wiring Diagram
Lock connectors:
- +12V – 12 V DC power supply
- GND – Ground (power supply negative)
- NO – Normally open relay contact
- COM – Common relay contact
- NC – Normally closed relay contact
- OPEN – Exit button input (EXIT)
- BELL_A – Wired doorbell input
- BELL_B – Wired doorbell input
- D0 – Wiegand D0 bus (input/output)
- D1 – Wiegand D1 bus (input/output)
Connection Methods
The presented diagram applies to a standard electric strike (NO). For an electromagnetic lock, use the NC output.
Standard electric strike (NO):
- NO → Electric strike
- COM → Common relay contact
Operation: After correct authorization, the relay is activated, and the electric strike unlocks the door.
Electromagnetic lock / Reversible electric strike (NC):
- NC → Electromagnetic lock / Reversible electric strike
- COM → Common relay contact
Operation: After correct authorization, the power supply is interrupted, which unlocks the door.
Wiegand reader mode (WG26):
The device can also operate as an external RFID reader cooperating with a master access controller.
In this mode, use the following wires:
- D0 – Wiegand data line
- D1 – Wiegand data line
- +12V – 12 V DC power supply
- GND – Power ground
Note: In Wiegand WG26 mode, the device does not directly control the electric strike or electromagnetic lock. Data from read cards is transmitted to an external access controller, which is responsible for opening the door.
Application
- Standard electric strikes
- Reversible electric strikes
- Electromagnetic locks
- Entrance doors
- Gates and fences
- Access control systems
- Installations using the Wiegand 26–44 bit interface
Technical Specification
- Application: Tuya Smart
- Connectivity: Wi-Fi 2.4 GHz + Bluetooth
- Ingress Protection Rating: IP68
- Unlocking Methods: App, RFID card, PIN code, card + PIN
- Supported Cards: EM 125 kHz
- Maximum Number of Users: 2,000
- PIN Code Types: Permanent, public, one-time, cyclical
- Wiegand Interface: 26–44 bit (input and output, default 26 bit)
- Adjustable Opening Time: 0–99 s
- Backlit Keypad: Yes
- Power Supply: DC 12 V
- Standby Current Consumption: ≤30 mA
- Mounting: Surface-mounted
- Operating Temperature: -40°C to +60°C
- Dimensions: 46 × 17 × 120 mm
- Weight: 100 g
Set Contains
- 1x CH4 Tuya Smart electronic keypad lock
- 1× Connection cable harness
- 2× Mounting screws
- 2× Wall plugs
- 1× User manual
