Hi,
> How about
>
> option ssid Lede-$(cat /sys/class/ieee80211/${dev}/macaddress | awk -F
> ":" '{print $4""$5""$6 }'| tr a-z A-Z)
Or with sed:
sed -ne 'y/abcdef/ABCDEF/; 1s/^.*:\(..\):\(..\):\(..\)$/\1\2\3/p' \
/sys/class/ieee80211/${dev}/macaddress
~ Jo