Update: correct data coming since this morning 11 CET or so.
I shared this issue with someone, he found this:
https://www.instructables.com/Wemos-D1-Mini-Temperaturehumidity-Monitoring/ and https://ezcontents.org/wemos-d1-mini-temperature-server
Maybe a good starting point for a DIY project when Netatmo keeps going offline for hours/days.
Because I used Netatmo indoor sensor for heating (Genertic Thermostat) i just finished D1 Mini + DHT22 sensor. Really simple integration with HA using Tasmota (which I’m using already).
I’m just printing case on 3D printer from here https://www.thingiverse.com/thing:4560287.