The README says who wrote it and the two projects it was built for, WII6
and OGLAS, with their sites; credits Ground Control for the modem and
the library that does the protocol work; and gives the licence with
contact details, where to report issues and what helps in a report, and
that it is not a Ground Control product. The licence, every source file
and the Python package's metadata carry the copyright and email; the
package lists its homepage, repository, issues and changelog.
samples/shell is `rb9704` on the shell with callbacks that print what
arrives, a CRC-32 and the start of each message from the network. Board
overlays for native_sim (the modem a host serial port, a pty or a real
9704 on USB), NUCLEO-U575ZI-Q, XIAO ESP32S3 and ESP32-S3-DevKitC.
tests/rig/bridge copies bytes between a board's USB serial port and a
UART, so two boards wired together stand in for a USB-serial adapter: one
runs the sample, the other bridges its modem UART to the host, where the
fake modem answers. Overlays for a Nucleo and a XIAO, either way round.
scottp