Temperature sensor to measure central heating (CV leidingen)

[Bartb]

Hi.

I am looking for a temperature sensor, supported by RFXCOM, which I can use to measure the temperature of the water in my central heating (CV-leidingen). Can anyone recommend a sensor for this?

I have found the following device, but reviews on whether it works in Domoticz or not, seem contradicting.

Temperatuursensor TFA 30.3139
https://www.conrad.nl/nl/temperatuursen ... &WT.srch=1

Thanks!

[Westcott]

The Banggood ones work well with RFXcom and RFlink

[Bartb]

Have a link or name of the product I can search for?
I need it to have one of these external connectors so that I can attach the sensor to the Central Heating system pipes, and it needs to talk to RFXCOM.

[niki_lauda]

Hi.

I am looking for a temperature sensor, supported by RFXCOM, which I can use to measure the temperature of the water in my central heating (CV-leidingen). Can anyone recommend a sensor for this?

I have found the following device, but reviews on whether it works in Domoticz or not, seem contradicting.

Temperatuursensor TFA 30.3139
https://www.conrad.nl/nl/temperatuursen ... &WT.srch=1

Thanks!

I bought this one a few years ago and its working very well.
https://weerhuisje.nl/index.php?action= ... 31&lang=nl

[Bartb]

That's usefull! Thanks!

[ubfssF]

Today I installed two of these for measuring temperature of the pipes my central heating:
https://www.conrad.nl/nl/temperatuursen ... 18426.html

Both work with RFXCOM in Domoticz.

[Derik]

perhaps build a espeasy with some dallas sensors...
You can make with 1 esp a complete readout device for all of your cv devices..[ 10-15 sensors. ]
And for less then a 1 433mhz sensor. [ buy Ebay ]

[NickHead]

I agree with the Dallas Sensors and ESPEasy, I use a NodeMCU with 3 Dallas Sensors, One Central Heating, One Hot Water
and One In the Fridge, (I had a problem with defrosting for no reason).

Cheap and cheerful, upgradable to more sensors if required, and so much fun to play with.

[MatthijsPH]

Is the one in the fridge battery powered?

[NickHead]

Sorry about the late reply Matt, I have been busy.

The temp sensors are on a single ESP12 node mcu board powered by a mains 5v PSU.
Effectively, if the fridge mains goes off, all 3 sensors go off, so no need for a battery supply.

It's been stable for a while now.

947539730 : DS : Temperature: 36.50 (28-be-df-26-0-0-80-ce)
947542137 : DS : Temperature: 6.31 (28-ff-41-cf-81-15-2-a9)
947543138 : DS : Temperature: 17.75 (28-92-f6-26-0-0-80-e)
947544233 : WD : Uptime 15699 ConnectFailures 0 FreeMem 26896

[whiteduck]

Hi there,

After reading this thread I bought two TFA 30.3139 with the external sensor and have an original USB RFXtrx on the latest firmware (Type 2 1024) but it cannot receive any signals from this device. I am on 3.8153 of Domoticz. The RFXCom happily receives Oregon and other AC/ARC signals.

I contacted Bert @ RFXCom who asked me to use rfxmngr - unfortunately I have no Windows device handy but I used rfxcmd_gc and didn't see anything coming back other than the Oregon's.

I have disabled all other protocols but no joy.

Does anyone have any suggestions?

Thanks a lot
Ian

[Bartb]

Were you able to get it working yet?
I have a similar sensor (TFA 30.3133) and have the following protocols enables for my RFXCOM transceiver.
One of the enabled protocols should allow you to detect/add the sensor.

Schermafbeelding 2018-05-06 om 22.06.19.jpg (53.52 KiB) Viewed 4029 times

[whiteduck]

Thank you - no but I know why now - I have the original RFXtrx433 so I lent the temperature sensor to a friend at work - he got it working but has the later RFXtrx433E device.

The excellent Bert from RFXCom offered a competitive upgrade so I will have a think or just live with them not being supported.

Thank you again!
Ian