GL.iNet GL-MT300N-V2 - Reading serial number

[Frank_38]

Hi,
I'm currently building a custom image for a GL.iNet GL-MT300N-V2. I was looking for a way to get the device's serial number and after poking around I found it in /dev/mtdblock2 (@ 0x4030). I was planning to write a really simple C application to retrieve it (because I have a use case where I need it) but I was wondering if this something that could be useful to someone else. And if that is the case what would be the best way to provide it ? Patching cpuinfo ? Something else ? Thanks in advance for your comments.

[RadioOperator]

Why serial no?

we normally use device MAC address.

How build to make OpenWrt_XXXX as a wifi SSID

Hi, modify file: package/kernel/mac80211/files/lib/wifi/mac80211.sh to generate all in /etc/config/wireless the ssid line: set wireless.wifi_ap${devidx}.ssid=OpenWrt_$(cat /sys/class/ieee80211/${dev}/macaddress|awk -F ":" '{print $3""$4""$5""$6 }'| tr a-z A-Z) $3""$4""$5""$6 take the last 4 chars. tr a-z A-Z convert it to upper case.

[Frank_38]

Hmm... good point. Maybe because in my mind the serial number was more "reliable" than the MAC address to identify a device. I've read the QR code that is on the back of the case and it returns the serial number, the custom DDNS, and the MAC address. So maybe you're right and I should stick to the MAC address instead of the S/N.