avrdude -c usbasp -p m328p -U lfuse:w:0xe2:m -U hfuse:w:0xd9:m -U efuse:w:0xff:m
Upgrading from stock to m-firmware (v1.5+) gives you: lcr t7 firmware
Open the case and read the model number on the microcontroller. avrdude -c usbasp -p m328p -U lfuse:w:0xe2:m -U
Open the case and verify the chip model printed on the IC. If you see an ATmega chip, you are likely in the clear to proceed with popular third-party alternatives. Popular Firmware Options Popular Firmware Options | Feature | Stock LCR-T7
| Feature | Stock LCR-T7 FW | Open-Source (k-firmware) | |-----------------------|--------------------------|--------------------------------| | Frequency measurement | Limited | Full up to 10 MHz | | ESR measurement | Basic | More accurate | | Calibration storage | Fixed factory cal | User EEPROM calibration | | UI customization | No | Yes (menus, fonts, colors) | | Update method | Proprietary .hex via ISP | Standard ISP (e.g., USBasp) |