Title: LCR-T7 Firmware Update: Download and Installation Guide

Here is the relevant information and the link you requested.

To update the firmware, you cannot use the USB port on the front (which is for charging only). You will need: ISP Programmer Arduino used as an ISP ISP Connection

: A common community resource that provides pre-compiled English and Russian versions of both the Markus and Karl-Heinz firmware specifically bundled for the LCR-T7/TC7 clones. Instructables Critical Pre-Update Checks

Finding the correct firmware is critical, as flashing the wrong version can "brick" your device. There are two main paths you can take: 1. Official Manufacturer Firmware