The Wi-Fi/BT module used in ROCK 5C is AIC8800. To set a fixed Wi-Fi MAC address, you need to write the MAC address to the EFUSE of the AIC8800. The EFUSE MAC address can only be written twice.(it may have already been burned once at the factory). Below is the script and the image I used. Additionally, you need to place an extra bin file in the same directory as the script (I executed it in the /home/radxa directory.).
script: flash_mac.sh flash_mac.zip (994 Bytes)
image: https://github.com/radxa-build/rock-5c-6_1/releases/download/rsdk-t3/rock-5c-6_1_bookworm_kde_t3.output.img.xz
bin: lmacfw_rf_8800d80_u02.bin lmacfw_rf_8800d80_u02.zip (155.7 KB)