aecho

A utility similar to becho that instead writes its output to a serial port. Unlike becho, aecho takes options:

Option	Description
‑p path	Specifies the path to the serial port device. Can also be specified with the environment variable ARDUINO_PORT.
‑b baud	Specifies the baud or bit rate used to communicate with the serial port. Defaults to 9600. Can also be specified with the environment variable ARDUINO_BITRATE.
‑m num str	Writes the specified string the specified number of times.
‑i	Writes standard input to the serial port.
‑f path	Writes the contents of a file to the serial port.
‑rl	Reads data back from the serial port until a newline and writes it back to standard output.
‑rm	Reads data back from the serial port until a carriage return and writes it back to standard output.
‑rn	Reads data back from the serial port until a null byte and writes it back to standard output.
‑ra	Reads any and all data back from the serial port and writes it back to standard output.
‑rf len	Reads the specified number of bytes back from the serial port and writes it back to standard output.
‑rb	Reads a single byte back from the serial port and writes it back to standard output.
‑d msec	Waits the specified number of milliseconds before processing the next argument.
‑o	Opens the serial port before anything has been written.
‑c	Closes the serial port before all arguments have been processed.
‑n	If nothing has been written, exit immediately instead of writing standard input to the serial port.

If no data is written to the serial port using the arguments to aecho, standard input will be written instead, unless the -n option is specified. The 'a' in aecho stands for 'arduino.'