Hi @felmue . Thanks for the reply. I think I got the solution the same time you sent me yours. I did use the code in here as below: I did an 'Execute' Block: import ubinascii import network wlan_sta = network.WLAN(network.STA_IF) wlan_sta.active(True) wlan_mac = wlan_sta.config('mac') wlan_mac=ubinascii.hexlify(wlan_mac).decode().upper() then a Label Block: wlan_mac Anyway, thanks for taking the time and effort to reply. Rami