ESPAltherma as InfluxDB client

[t3fi]

Fellow Hobby-Daikinians 👋 ,

In case someone gets interested, there's fresh fork of mine where I integrated tobiasschuerg/ESP8266 Influxdb - to politely avoid the setup of MQTT broker and related plugin(s). In order to retain MQTT-style ties with debug log messaging to a remote server, I paired influx with syslog using sylvainsicard/MyLog.

I didn't want to take that leap to Home Assistant nor MQTT as I've had InfluxDB+Grafana setup in home NAS for energy monitoring and it felt that the heat pump shouldn't ask for more than a new bucket of measurements - at that end.

Big thanks to all contributors here making it so easy to start collecting data from Altherma! I've been succesfully monitoring my unit close to a month now using this approach in M5StickC Plus2 and recently stashed my change into that fork. Most likely I won't have time or energy in near future to test the MQTT code path against regressions, but I did try to retain all the code and abstracted it in way that there could be some potential for coexistence. Maybe other integrations would also be at reach with little less effort on top. But, no PR unless someone is down to help polishing it further.

BR,