PUB start(rxpin, txpin, mode, baudrate) : okay
PUB stop
PUB rxflush
PUB rxcount : count
PUB txcount : count
PUB rxcheck : rxbyte
PUB rxtime(ms) : rxbyte | t
PUB rx : rxbyte
PUB tx(txbyte)
PUB str(stringptr)
PUB dec(value) | i, x
PUB hex(value, digits)
PUB bin(value, digits)