OBO HANDS F20-K WiFi Tuya Fingerprint Access Controller

1. Introduction

The OBO HANDS F20-K is an advanced WiFi Tuya Fingerprint Access Controller designed for secure and convenient access management. This standalone RFID keypad system supports multiple unlocking methods including fingerprint, RFID card (125KHz and 13.56MHz dual-frequency), password, and remote control via the Tuya Smart APP. Its IP68 waterproof rating makes it suitable for outdoor installation, providing robust security for various environments.

The OBO F20-K keypad, highlighting its WiFi and dual-frequency capabilities.

2. Safety Information

• Ensure all wiring is performed by a qualified professional to prevent electrical hazards.
• Disconnect power before performing any installation or maintenance.
• Do not expose the device to extreme temperatures or corrosive substances beyond its IP68 rating.
• Keep the device away from strong electromagnetic interference.
• Use only the specified DC 12V power supply.

3. Package Contents

• F20-K Access Control Keypad
• Mounting Screws and Wall Plugs
• Wiring Harness
• User Manual (this document and a physical copy)
• (Optional, depending on variant) RFID Key Cards

The F20-K keypad as packaged, including the instruction manual.

Example of optional RFID cards that may be included with certain product variants.

4. Specifications

Diagram showing the dimensions of the keypad and a summary of its features.

5. Setup

5.1 Physical Installation & Wiring

Mount the keypad in the desired location using the provided screws and wall plugs. Ensure the location is suitable for an IP68 waterproof device if installing outdoors. Connect the wiring harness to your access control system components (e.g., electric lock, power supply, exit button, doorbell).

Rear view of the keypad with the multi-colored wiring harness for connection to external components.

Internal view of the circuit board and wiring connections. Ensure proper connection to avoid damage.

5.2 Tuya Smart APP Connection

1. Scan the QR code in the physical manual or search for "Tuya Smart" in your device's app store (iOS/Android) to download the app.
2. Open the Tuya Smart APP.
3. Ensure your smartphone's Wi-Fi and Bluetooth are turned on.
4. On the access control keypad, enter: #* 123456 # 68 #
5. In the Tuya APP, click "Add Device".
6. Click "Add" to search for the device.
7. Enter your Wi-Fi password when prompted.
8. Click "Next".
9. Click "Done" once the device is successfully added.

Demonstration of the Tuya App's remote unlock functionality.

For more detailed instructions, refer to the official user manual PDF: User manual (PDF)

6. Operating Instructions

The default programming password is 123456.

6.1 Adding Users with Tuya APP

Screenshots of the Tuya App interface, showing options for adding codes, temporary codes, viewing logs, managing members, and device settings.

• Add Member: In the app, click "Member manage" then "+" to add administrators or ordinary members.
• Add Fingerprint: Click "Fingerprint Add", then place the fingerprint on the keypad three times.
• Add Password: Click "Code Add", enter a 6-digit code, then click "Save".
• Add Card: Click "Card Add", swipe the RFID card on the access control keypad, then click "Done".
• Add Remote Transmitter (315MHz version only): Click "Telecontrol Add".
• Add Temporary Code: Click "Temporary code", select "Once" (code valid for 6 hours and can be used once), then click "Save". You can share this password via WeChat, Email, or Message.

Visual representation of the various methods to unlock the door: Tuya App, fingerprint, RFID card, password, and remote control.

6.2 Programming without Tuya APP (Direct Keypad Programming)

The default programming password is 123456.

• Add Management Card ("Add Card"): Press #* 123456 # 61, swipe card, press # **
• Delete Management Card ("Delete Card"): Press #* 123456 # 62, swipe card, press # **
• Add Remote Control (2 Methods):
  1. Swipe management card "Add Card", press remote control, press # **
  2. Press #* 123456 # 5, press remote control, press # ** (Supports 315MHz version only)
• Add Fingerprint (3 Methods):
  1. Swipe management card "Add Card", place fingerprint three times, press # **
  2. Press #* 123456 # 5, place fingerprint three times, press # **
  3. Press #* 123456 # 5, input user code (10000-60000), press #, place fingerprint three times, press **
• Add RFID Card (4 Methods):
  1. Swipe management card "Add Card", swipe card, press # **
  2. Press #* 123456 # 5, swipe card, press # ** (For multiple cards, continue to swipe, press ** to exit programming)
  3. Press #* 123456 # 5, input user code (1-8000), press #, swipe card, press **
  4. Press #* 123456 # 2, input 10 digits card number, press # **
• Add Password: Press #* programming password # 3, input 6 digits password (not starting with 0), press # **. Example: #* 123456 # 3 147890 # **. Then input 147890# to unlock.
• Set RFID card + Password to unlock: Press #* programming password # 65, swipe card, input password, press # **. Example: #* 123456 # 65, swipe card, 123123 # **. Then swipe card plus input 123123# to unlock.

6.3 Deleting Users (Direct Keypad Programming)

• Delete Remote Control (2 Methods):
  1. Swipe management card "Delete Card", press remote control, press # **
  2. Press #* 123456 # 81, press remote control, press # **
• Delete a Single Fingerprint (3 Methods):
  1. Swipe management card "Delete Card", place fingerprint, press # **
  2. Press #* 123456 # 81, place fingerprint, press # **
  3. Press #* 123456 # 83, input user code, press # **
• Delete a Single Card (4 Methods):
  1. Swipe management card "Delete Card", swipe card, press # **
  2. Press #* 123456 # 81, swipe card, press # **
  3. Press #* 123456 # 82, input 10 digits card number, press # **
  4. Press #* 123456 # 83, input user code, press # **
• Delete Private Password: Press #* programming password # 84, input password, press # **. Example: #* 123456 # 84 147890 # **.
• Delete All Cards: Press #* 123456 # 9 # 369 # **
• Delete All Fingerprints: Press #* 123456 # 9 # 709 # **
• Delete All Remote Controls: Press #* 123456 # 9 # 147 # **
• Delete All Password Users: Press #* 123456 # 9 # 108 # **
• Delete All RFID Card + Password Users: Press #* 123456 # 9 # 258 # **
• Delete All Users (Fingerprints, Passwords, Cards): Press #* 123456 # 9 # 123 # **

7. Advanced Functions

• Switch Voice Prompts to English: #* 123456 # 661 #
• Switch Voice Prompts to Chinese: #* 123456 # 660 #
• Set Keypad as Access Controller (Reading Head Input): Press #* 123456 # 631 # **
• Set Keypad as Card Reader (Reading Head Output): Press #* 123456 # 630 # **
• Set Keypad as WG Reader:
  • WG26 mode: #* 123456 # 6626 # **
  • WG34 mode: #* 123456 # 6634 # **
• Data Copying (Supports Card and Password Only): Press #* 123456 #. The buzzer will beep twice, and the green light will illuminate, indicating entry into setting mode.
  • On the access control keypad B (duplicate device): Press 9 # 789 #
  • On the access control keypad A (main device): Press 9 # 135 #
• Set Door Opening Time: Press #* programming password # 7, input digits from 1-9, press **. (1 represents 2 seconds, 2 represents 4 seconds, 9 represents 18 seconds). Example: #* 123456 # 7 2 **
• Turn On or Off Normally Open Mode: Press #* 123456 # 87 # **
• Set Backlight Long On Mode: Press #* 123456 # 881 # **
• Set Backlight Long Off Mode: Press #* 123456 # 880 # **
• Add One-Time Password: Press #* 123456 # 64, input 6 digits password, press # **
• Delete One-Time Password: Press #* 123456 # 9456 # **

8. Maintenance

• Cleaning: Wipe the keypad surface with a soft, damp cloth. Avoid abrasive cleaners or solvents.
• Waterproofing: While rated IP68, ensure all connections are sealed properly during installation to maintain water resistance.
• Firmware Updates: Check the Tuya Smart APP periodically for any available firmware updates to ensure optimal performance and security.

The keypad demonstrating its IP68 waterproof capability and blue backlight for visibility in low light.

9. Troubleshooting

• Keypad unresponsive: Check power supply (DC 12V). Ensure wiring is correct.
• Wi-Fi pairing issues: Double-check your Wi-Fi password. Ensure your phone's Wi-Fi and Bluetooth are on. Try performing a factory reset and re-pairing.
• Programming codes not working: Ensure you are using the correct default programming password (123456) or your modified password. Pay close attention to the sequence of # and *.
• Device not found on Wi-Fi network: Perform a factory reset and attempt the Tuya APP connection process again.
• Intermittent malfunction: Some users have reported issues with the internal 12V to 5V voltage reduction chip (e.g., Omron G6H-2). If you experience consistent power-related malfunctions, this component might be a point of failure. Professional inspection is recommended.

9.1 Factory Reset

To restore the device to factory settings (resetting the programming password to default 123456 and deleting all users):

1. Press 9876543210 #
2. After the reset, use the default programming password 123456 to add or delete users.

9.2 Modify Programming Password

The default programming password is 123456. To change it (e.g., to 456789):

• Press #* 123456 # 1 456789 # **

10. User Tips

• Wi-Fi Pairing Code: If the instructions don't specify, the code to enter on the keypad for Tuya Wi-Fi pairing is typically #* 123456 # 68 #.
• Sound Control: To turn keypad sounds ON, use 633 #. To turn sounds OFF, use 632 #.
• Backlight Control: To set the backlight to stay ON, use 881 #. To set it to turn OFF, use 880 #.
• Enhanced Security: For higher security, consider using an external relay with Wiegand communication. This allows only the fingerprint and card readers to communicate with the Wiegand relay, isolating the numeric keypad and Wi-Fi control from direct lock activation.
• Component Longevity: Be aware that the internal chip responsible for voltage reduction (12V to 5V, often an Omron component) has been identified by some users as a potential weak point. Consider having a spare unit if continuous operation is critical.

A close-up of the internal circuit board, showing the Omron 5VDC component mentioned in user feedback.

11. Warranty & Support

For warranty information and technical support, please refer to the seller or manufacturer's official channels. Keep your purchase receipt for any warranty claims.