Zkteco Update Firmware -

If this fails, you need JTAG programming hardware—contact ZKTeco service center.

Firmware updates generally do not delete user data (fingerprints/logs), but it is standard safety protocol to backup first. Zkteco Update Firmware

Ensure the device is connected to a reliable power source. A power failure during an update can permanently "brick" the hardware 🛠️ Step-by-Step Update Procedure (USB Method) If this fails, you need JTAG programming hardware—contact