Use a `dict` to map values to thermostat parameters, which correspond to
the `set_param` parameters in the pytec client. New tag
"thermostat:set_param" used in JSON.
Also:
* Add aioclient
The old client is synchronous and blocking, and the only way to achieve
true asynchronous IO is to create a new client that interfaces with
asyncio.
* Finish Nix Flake description and make the GUI available for `nix run`
Rewrite of PID according to https://hackmd.io/IACbwcOTSt6Adj3_F9bKuw PID implementation.
To migrate:
- TEC+/- pin polarity has to be reversed.
- Some saved settings might be wiped upon flashing of new firmware, back up settings before upgrade
- Min / Max integral parameters no longer exist
- kp, ki, kd will likely need to be retuned
The software has been tested on hardware with good temperature control stability.
Reviewed-on: M-Labs/thermostat#68
Co-authored-by: topquark12 <aw@m-labs.hk>
Co-committed-by: topquark12 <aw@m-labs.hk>
