Node-red freezes running only a few nodes

General
41

Yes - I don’t think so as well. Could it be a problem regarding the DHT lib. Maybe an older one does not cause that problem. What do you think?

42

Are you really really sure the dht22 data line is connect to pin 4 of the pi? It should not share the same line as the ds18b20’s.

I have a dht22 connected to pin 12 and if I adjust the node to point to pin 12 it works fine. IF I change the node to point at pin 4 (with the dht22 data line still on pin 12) it hangs as soon as I hit deploy.

43

wait a minute - you have the dht22 node looking at physical pin 4 which is a ground pin if you want GPIO 4 that is physical pin 7

44

No - my DS18B20 sensors are connected to GPIO4(Pin7) and DHT22 is connected to GPIO17(Pin11).

45

You are the best!!! Silly me - I got mixed up regarding BCM/GPIO etc. Now eveything is working find. Thanks a lot guys for all your help. I learned a lot.

Your help is much appreciated.
Leafboy

46

I have rasied an issue in git for node-red-contrib-dht-sensor abot this issue.