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From IGEP - ISEE Wiki
→Connection test
Connect the SMARC base RS232 RX2 and TX1 to host using a null modem cable. <br> <br>
In the host side open a minicom program with: <br> <br>
minicom -D /dev/ttyUSB0 (if you are using a usb-serial converter).
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In the SMARC side write the commands: <br> <br>
stty -F /dev/ttyO3 speed 115200 cs8 -cstopb -parenb (in order to configure the device /dev/ttyO3). <br>
echo 'hello host' > /dev/ttyO3 (sent the message "hello host" to ttyO3). <br>
cat /dev/ttyO3 (recive the messages from host)
