This a simple code using COM port in Linux. The host sends a packet of 6 bytes (including CRC) through serial port and waits for the responding packet. If CRC is correct, the packet is parsed to get some useful data. Test code and Makefile is included.-This is a simple code using COM port in Linux. The host sends a packet of 6 bytes (including CRC) through serial port and waits for the responding packet. If CRC is correct, the packet is parsed to get some useful data. Test code and Makefile is included.