Influxdb v2 compatible sending client for esp devices

[mohs8421]

I needed to have a working send-only system to run in an ESP32-Environment.

I just wanted to share my code with you, maybe it helps in one way or an other. So please have a look at this gist: https://gist.github.com/mohs8421/6188b30fd78e0fa05a892df9427dd018