A computer with a TFTP client (built into Windows/Linux/macOS), static IP configuration, and the official firmware file renamed to firmware.bin .
If you are putting together a feature or overview of this device, here are its core specifications and selling points: zlt p21 firmware update
Used if the device has no internet access or for specific beta builds. A computer with a TFTP client (built into
Navigate to the System or Advanced tab and look for "Firmware Update" or "Software Update". Local vs. Online Update: static IP configuration