Author Topic: Fibaro Universal Sensor and DS18B20  (Read 542 times)

Offline Catman

  • Jr. Member
  • **
  • Posts: 66
  • Karma: +0/-0
Fibaro Universal Sensor and DS18B20
« on: October 13, 2018, 10:42:52 am »
Hi all

Odd things happening to me. I have a Fibaro Universal Sensor in my garage.  Connected to it are 4 waterproof DS18B20 temperature sensors.

All worked fine over the summer, reporting the temperature correctly.

Two continue to do so, but now two are locked on 18.93 and 20.25 Celsius.  Nothing I can do appears to have any effect.

I've disconnected both of the static sensors and replaced one of them (I have a spare)

No difference.  I'd like to avoid resetting the Universal sensor if at a possible, so any other suggestions?

TIA

C

Offline Cor

  • Hero Member
  • *****
  • Posts: 1217
  • Karma: +8/-4
Re: Fibaro Universal Sensor and DS18B20
« Reply #1 on: October 13, 2018, 01:48:14 pm »
I had and have similar issues with the same setup.

About a year ago it helped to click the " configure now" button and it started working again.

Another time " wiggling" the connectors did the trick.

Now, nothing. All sensors say 0 degrees. Poll is good, but no sensor inputs go through.

All good when you poll?

This week I need to exclude and re include  this device.
Just to be sure I will also attach new sensors and this time not solder them but use connectors.

Cor

Offline Catman

  • Jr. Member
  • **
  • Posts: 66
  • Karma: +0/-0
Re: Fibaro Universal Sensor and DS18B20
« Reply #2 on: October 13, 2018, 02:13:22 pm »
Thanks, Cor.

Yes everything seems OK with the Universal sensor, it's just two out of the four temperature sensors that make no sense. I mean, if they read 0C I could probably understand it, but they don't. It's these two specific sensors (even if I put one in my conveniently placed freezer, it continues to insist that the temperature is 20.25C)

Very odd, given all the sensors are using the same single line data bus.

I've disconnected and reconnected them as well to make sure the connections are good and tight.

C

Offline Cor

  • Hero Member
  • *****
  • Posts: 1217
  • Karma: +8/-4
Re: Fibaro Universal Sensor and DS18B20
« Reply #3 on: October 14, 2018, 05:22:30 am »
Have you switched the Temperature sensor , so you can troubleshoot if it is the sensor or the fibaro?

Cor

Offline Catman

  • Jr. Member
  • **
  • Posts: 66
  • Karma: +0/-0
Re: Fibaro Universal Sensor and DS18B20
« Reply #4 on: October 14, 2018, 06:32:33 am »
I have indeed.  No change

C

Offline Cor

  • Hero Member
  • *****
  • Posts: 1217
  • Karma: +8/-4
Re: Fibaro Universal Sensor and DS18B20
« Reply #5 on: October 14, 2018, 12:05:56 pm »
You said , you have changed 1 sensor , maybe ( just thinking up loud) the other one is broken and causes both of them to lock up?

thinking about that that .... could be the same issue with mine now  ???

Cor

Offline Catman

  • Jr. Member
  • **
  • Posts: 66
  • Karma: +0/-0
Re: Fibaro Universal Sensor and DS18B20
« Reply #6 on: October 14, 2018, 12:19:58 pm »
That was a sensible suggestion, thanks :) . I only had one spare, so I removed the other one totally. Of course that would need a reset as well to be sure.
So I did a reset anyway, and for now, all is working correctly.

Cheers
C

Offline kulfsson

  • Jr. Member
  • **
  • Posts: 58
  • Karma: +2/-0
Re: Fibaro Universal Sensor and DS18B20
« Reply #7 on: October 14, 2018, 06:17:20 pm »
I have experienced the same. I believe this is a problem with Vera. I've tried all troubleshooting steps and the only way to "fix" it has been to re-include. It always starts with the last sensor in the chain.

There is another thread on this somewhere in here, but there is no solution. In the manual it states that the fibaro cane be either a temperature setup or a digital setup, but the Vera registers both, which maybe part of the problem, at least it is a theory.

This is the single most annoying thing in my Vera setup as I use it for heating control.

Offline Catman

  • Jr. Member
  • **
  • Posts: 66
  • Karma: +0/-0
Re: Fibaro Universal Sensor and DS18B20
« Reply #8 on: October 15, 2018, 12:10:13 am »
Annoying indeed!

Thanks for the input I'll keep an eye

Cheers

C