Connect to the device via UART
UART is a peripheral device for asynchronous serial communication in which the data format and transmission speeds are configurable. wiki
Check UART voltage: 3.3V vs 5V
Connect UART
GRD - GRD TX - RX RX - TX
Plug device
Plug USB
Check device connected:
$ lsusb
Find tty:
$ ls /dev/ | grep USB
Connect to device
(Check: standard Baud Rates)
$ screen ttyUSB0 115200
(As alternative see: picocom)
picocom -b115200 /dev/ttyUSB0