bmspy-ups selected its device from the devices that had data at startup, and exited with status 0 if the selection failed. One failed first read ended the monitor or made it select the wrong device.
The server has a new DEVICES command that lists the configured names, and client.list_devices calls it. bmspy-ups selects from that list and then waits for the first data of its device. A wrong or missing --device now exits with status 2. The service file does not restart on that status, because a restart cannot correct it.
An older server ends on the unknown DEVICES command, so update the server first.
Correct the spelling in the JBD and EcoFlow snapshots, the diagnostic tool, and the tests. UPS.from_dict maps the old name to the new name, so a client still reads data from an older server during an upgrade.
InfluxDB and Prometheus now receive this measurement under the new name.
tim