Usage:
pace [options] [file]
Write bytes from file or stdin to stdout at a specific pace, defined as
nanoseconds per byte. The default pace is 86805nS per byte to simulate 115,200
baud N-8-1 UART transfer.
Options:
-b baud - simulate UART baud rate
-f - also delay before the first byte
-n nS - nanoseconds per byte, 1 to 999999999
-v - report pace to stderr
-b and -n are mutually exclusive. Exits immediately after last byte is sent.