wrong readouts of metereologic data

[EastEriq]

At least according to what displayed by graphana (it may be wrong read from instrument, or wrong insertion into the database). I think the issue belongs here as last-meteologger is part of last-tools.

Note in the following graph:

• Arduino dew point ~82C
• Arduino out humidity 84.1% constant
• Davis out pressure 1.58kbar constant
• Arduino wind speed 271577 km/h

[EastEriq]

One of the Arduino sensors (the external barometer/hygrometer) might be faulty and will be checked at first opportunity, ok, but often Arduino_out data is all together missing from the plot in graphana, and sometimes it reappears without notice.

USB cabling at the observatory is terrible and may be blamed, but I also thought of this: serial port definitions like https://github.com/blumzi/WAO_Safety/blob/master/config/safety.toml#L53 may become wrong, because they are freely renumerated by the OS. I'd suggest to switch to a way of binding them to their physical address, like I did here and here (essentially, navigating /sys/bus/usb-serial/devices/, /dev/serial/by-id/ etc.)