Confirm the update. The device will read the file, display a progress bar, and automatically reboot when finished.
A core application binary file (typically named emfw.cfg , uimage , or update.tgz ).
If you cannot find the file in the portal, the safest method is to email ZKTeco support directly or contact the authorized distributor where you purchased the device. They will email you the correct .apk or .img file specifically for your device's hardware version. zkteco k40 pro firmware download updated
The update might have reset the device communication password or IP address. Go to the device network settings and verify the IP address, Subnet Mask, and Communication Key match your software configuration.
Place the firmware file (often named emfw.cfg or similar) in the root directory of the USB. Insert and Update: Plug the USB into the K40 Pro. Navigate to Menu > System > USB Upgrade . Follow the on-screen prompts. Confirm the update
Save the firmware update file provided by ZKTeco support onto the root directory of the USB drive.
An interrupted update can wipe your machine. Back up your user data and logs to a USB flash drive: Insert a FAT32-formatted USB drive into the K40 Pro. If you cannot find the file in the
You will often need this to request the specific file from support. 📥 Where to Download the Updated Firmware
Some updated versions introduce QR code reading improvements, faster template extraction, or extended log storage management.
Before downloading, check your current device version in the System Information menu ( M/OK > Main Menu > Sys.Info ) to ensure the new firmware is compatible with your hardware revision. How to Update Your Device
