Power & Source of Big Ideas

thank you for replay , i appreciated

regards
is there are any advice please
dear all, i already bough dlink 3g modem to connect to nanopi due , i use the following manual to start the step of installation , http://ftp.dlink.ru/pub/usb/DWM-157/Description/D-Link%20DWM-157%20Linux%20guide.pdf the first step is mnt the package of modem which it will locate in /dev/sr0 or /dev/...
Dear all , first of all , i need to thank who make nanopi DUe , it work perfectly with me .. my question is simple . now i use build in usb for power on the nanopi from my pc , it there communication protocol to communicate with it without using serial pins ? or how to make it work as flash usb memo...