Ok, it seems a cable problem. We'll see what happens this week.

And now e-mail notifications? We use office 365 but can't get the job done. Raspberry is only for my lokal network. Is that a problem?

Thanks, already followed all those steps. Just did it again. Can't find anything. Maybe bad connection somewhere? It functions for some hours and then stays at exact the same temp.

Here the same, but without email notification. Esp is running great. But the place where I want to measure too has no wifi, only lan. So I connected three bs18 direct to the raspberry. Runs ok, but only for a short time. Don't know what could be wrong.

Well, there are some problems. The ds18b20’s direct connected to the raspberry seem to freze after a few hours. They keep displaying the same temp.
The sensors conected via a nodemcu keep working without a problem.
Any idea someone?
Thanks already

Yes, I use a nodemcu. Works very nice. The only thing is that there is only room for a few sensors.

And the place where I want to put these, there is no wifi.

Refresh devices did the job. PANNEKOEK. Some day everything is ok

Well, it seems that I have the same problem. Were there any solutions to get this going?
Thanks in advance