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.
Ground Control's RockBLOCK 9704 library is pinned untouched in west.yml
and compiled here for any board with a UART: a serial port on the bus of
the rock7,rockblock-9704 devicetree node, the library's timing calls on
the kernel, and one worker thread that owns every call into it, since the
library has no locking and shares static buffers.
The worker sleeps until a request or a byte from the modem arrives.
Requests (begin, end, power, send, info, signal) wait as long as the
caller says; a send with K_NO_WAIT queues and reports through mo_done.
Callbacks for a sent message, a received one, the signal and the
provisioning; a status snapshot that never touches the modem.
The library asks for provisioning once and keeps a miss for good; the
worker clears its cache before a send whose topic is missing and after
the modem refuses one, so a modem provisioned later is seen.
The serial port and worker began in the OGLAS satellite bench and were
carried through WII6's lib/wii6-sat.
scottp