OS: BPI-M3 Ubuntu15.10 (Kernel3.4) Version: 1.0 HDMI
1.Install the Minicom on BPI-M3
sudo apt-get install minicom
2.Set the Minicom on BPI-M3
sudo minicom -s
A- Serial Device : /dev/ttyS2
E - Bps/Par/Bits : 115200 8N1
F - Hardware Flow Control : No
3.Run the Minicom, then wait for the PC end to input text
sudo minicom
4.Install the Minicom on your PC
sudo apt-get install minicom
5.Set the Minicom on your PC
sudo minicom -s
Serial Device : /dev/ttyUSB0
Bps/Par/Bits : 115200 8N1
Hardware Flow Control : No
6.Input the text," Hello BPI-M3 ", after finishing the setting.
sudo minicom
7.Check if there’s the text showing on the terminal window on BPI-M3
Video Demo:
more about UART module :
https://bananapi.gitbooks.io/bpi-accessories/content/uartmodule.html