I got 2 x Orange PI pc+ running Armbian (install by same SD card on eMMC). My two orange pi pc+ got same wlan0 mac address. I did research on forum and saw some suggestion about bug of Network-Manager. I try remove (purge) Network-Manager but see no difference. I also try look in u-boot but don't know how to set mac address on the u-boot part. How should I make my 2 pc+ board have difference mac address? want to run these two board under the same wifi network. Please suggest. Thank you very much in advance.