- local firmware_md5_orig="fcb2fbd42d73a63fbf603505c718cbde"
- local firmware_md5_current="$(md5sum $firmware_file)"
- local firmware_md5_current="${firmware_md5_current%% *}"
+ local mac_offset=276
+ local mac_length=6
+ local default_mac="00:03:07:12:34:56"
+ local current_mac="$(hexdump -v -n $mac_length -s $mac_offset -e '5/1 "%02x:" 1/1 "%02x"' $firmware_file 2>/dev/null)"