setserial — Read and modify serial port information. More information: <https://manned.org/setserial>.

Print all information about a specific serial device

setserial -a {{/dev/cuaN}}

Print the configuration summary of a specific serial device (useful for printing during bootup process)

setserial -b {{device}}

Set a specific configuration parameter to a device

sudo setserial {{device}} {{parameter}}

Print the configuration of a list of devices

setserial -g {{device1 device2 ...}}