Domoticz - Temp+Humidity issue

[stokni]

Hi,

I just installed Domoticz on a PI2, connected Arduino nano with NRF24L01+ as gateway via USB and created a sensor of seperate Arduino Nano (with NRF24L01+) and Temp+Humi sensor (AM2303 /DHT22).

Got everything to work, but have the following chart:

Temp and Humidity sometimes drop to 0, in Serial monitor of Arduino correct values are shown.

Had to add the device twice, but both give 0 values now and then.

Like i said, just started with Domoticz and MySensors, And tips on how i can troubleshoot this?

Any help is appriciated!

Thanks.

[alexsh1]

I have the same issue with DHT22/ds18b20 - you will have to eliminate it in your code or JSON file. I have a slightly different setup though - I use Particle Photon and JSON for temp / humidity. Have a look at my discussion of this issue on a different forum:

https://community.particle.io/t/ds18b20-is-throwing-127c-from-time-to-time/16401/2

I hope it helps.

[AWI]

@stokni can you share your sketch? It is possible that you send a null value if your sensor has a bad reading. This happened to me also. Domoticz does not create zero readings by itself.

[NotYetRated]

Weird, my sensors all report just fine to Domoticz....

[sundberg84]

I also have DHT22 working fine with domoticz (not using ds18b20). Could it be some error in the reading and the node sends that error as 0 ? Maybe you could eliminate that in the code? Just guessing...

[stokni]

Thanks all for the reply's, i will investigate further.

@AWI i have used the standard sketches from mysensor, without any modifications.

[stokni]

Problem seems to be solved after adding a 4.7uF capacitor to both NRF24L01 modules..