Axon and Arduino

To send a command to Arduino UART interface from AXON microserver (and this also applies to all Linux distributions), you need:

to test if your Arduino is recognized by the system (lsusb is a part of usbutils package) lsusb there should be something like Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

to determine the serial port device file ls -l /dev/serial/by-id/

to set default port speed (this is necessary to do just once per OS session) @@stty 9600 -F <path to your device>

after that you can use printf or echo pritnf "string or char" > <path to your device>

Here is the detailed guide for LED Tetris game based on Arduino and that utilizes UART communication (with the source code, PCB, schematics, compiling and flashing scripts).