I have ordered two Digoo Hygrometer Thermometer DG-R8H and paired it with Domoticz, and they work like a charm.
No idea why the old one (Huger) isn't working below 10 degrees, and these sensors are fine!
4 Euros and I will order another one, because I am working on a project in my garage, that's why ...

Brand=Huger
https://www.amazon.de/Huger-Thermo-Zusatzsensor-Oregon-Scientific-Modelle/dp/B0000AP7KI

No fancy thing.
Reset was already done, does send data (because base station receives it correctly)

Looks like something is wrong in Domoticz, see log of Domoticz:

2017-09-17 03:45:00 10
2017-09-17 ...

Thanks Jos,

I see no updates anymore from the sender via 433Mhz below 10 degrees in the log, the last one is:

69 RFXCOM 433 0A01 1 Tuin temperatuur Temp THR128/138, THC138 10.0 C 5 Laag Log 2017-09-17 04:29:57

But the Huger weatherstation is receiving data because it had a value of 7.4 at that ...

Hello, I am a newbie on this forum. But we have a well-automised Domoticz system running our electronics.
Everything works perfectly, but I see at our thermometer outside our house that it only gets data of >10 celsius.
I gets updates as normally so the sensor works.
Our weatherstation gets normal ...