Lookin gfor a temperature/humidity sensor (not the 4 in 1)

Other Devices & Integrations Climate Control & Temperature Sensors
1

I already have 3 of the 4 in 1s and about about to toss them out as they can’t seem to agree on a temp/humidity level with each other, nor with other known good measurements. Yes, I have the latest firmware :slight_smile:

Is there a reliable temp/humidity sensor on the market?

2

[quote=“johnes, post:1, topic:183802”]I already have 3 of the 4 in 1s and about about to toss them out as they can’t seem to agree on a temp/humidity level with each other, nor with other known good measurements. Yes, I have the latest firmware :slight_smile:

Is there a reliable temp/humidity sensor on the market?[/quote]

Have you looked into Arduino? I been playing around with it for a short time and I can make a temp/humidity sensor for around 10-12.00 that seems to work well.

3

The best solution I have found is to add a RFXtrx transceiver to the Vera and use Oregon Scientific or other 433MHz temp/hum sensors. Much cheaper (so the initial cost for the RFXtrx is not a problem) and better accuracy.

4

Do you have links on the stuff you are using?

5

I have an Everspring ST814 battery powered one which works pretty well.

6

From looking around, the 814 seems to suffer the same accuracy problems. I ordered one to compare… we’ll see how that goes.

7

I’ve thought about this too, can you provide model numbers used?

8

I’ll post more info.

DHT22 Module accuracy:

Humidity range: 0%-100%RH (?2%RH). Temperature range: -40-80?C (?0.5?C).

This also leave the door open for many other sensors.

9

I second arduino. I have built 4 of them so far and they are very good.

10

You need a RFXtrx433E (RFXtrx433E USB 433.92MHz Transceiver) and lolodomos nice little plugin (http://forum.micasaverde.com/index.php/board,45.0.html).

433MHz sensors are abundant, many weather stations use them. The Oregon RAR501 is a good buy here in Sweden, you get 3 good sensors and an additional display for quite cheap.

You can also use the RFXtrx with lots of other devices. I have 433MHz motorized blinds and light switches, in addition to my Z-Wave devices.

11

Thanks nOir