Bad temperature readings with DS18B20 Topic is solved

[machal88]

I have a problem with reading temperatures if outside is below 0 degrees in Celcius via DS18B20.

If the temperature outside is under "0" everything is OK, in Domoticz values are OK also, but now at night on the normal thermometer is -2 degrees, but on Domoticz is "0" and gives in LOG Error: 1-Wire system : error reading value from /sys/bus/w1/devices/

If I check the status via command in SSH " /sys/bus/w1/devices/28-0115623756ff $ cat w1_slave" it shows correct values (ie. -1222), so I think there is a problem in Domoticz...

Could you please give me some advise on this case? I will be very grateful

EDIT: after update to newest beta version of Domoticz it's working OK, but next problem occurs - this time with scripts - switches over gpio/433mhz... they doesn't work...

EDIT #2: working after adding "///" (3 slashes) before script

[Jastrzi]

machal88 have a same problem. Just noticed the readings below 0 degrees starts failing and Domoticz does not show values below 0.

Domoticz Team, are you planing to release the stable version soon or I need upgrade to BETA?

[gizmocuz]

a stable will be published when it is ready (and not now... waiting for some changes first)

To answer your question, update to the stable indeed!

[makuta77]

Hi,
I have exactly the same error in version 2.2563.
Need a workaround for this problem please...

Best Regards

[machal88]

Hi @makuta77

You just need to update your Domoticz to the latest beta (i.e. V2.3295), this will solve the problem

To update Domoticz from your version or below type via SSH or at the terminal on Raspbian:

Code: Select all

1. cd domoticz
2. wget http://domoticz.sourceforge.net/beta/domoticz_linux_armv7l.tgz
3. tar xvfz domoticz_linux_armv7l.tgz
4. rm domoticz_linux_armv7l.tgz
5. sudo service domoticz.sh restart

Please let us know if this solution will work for you

[popunonkok]

I have the same problem aswell...
In Domoticz it flatlines at Zero degrees. But if i look at my RDDtools graph it shows below zero.
Its feels especially bad because where I live the temperature is just starting to drop below zero in the nights witch is kind of interesting to Log.

@machal88 : The problem with your solution is that i guess it could bring along other kind of problem since it is the Beta version. Im not interested in the Beta because I want my system to be as stable as possible.

Really looking forward to the next stable version.

[makuta77]

Hi,
I agree with @popunonkok that install beta version is not a solution. I thing we need a patch or something for stable version to display temperature correctly.

For that moment i don't want to install beta version.

[eriksson25]

Hi, just wanted to say that I had the same problem, did the upgrade to beta version and it works now. Its my small system so its ok if its not 100% stable.

[makuta77]

Hello,
In my system upgrade to beta version resolved the problem and it is quite stable