ZXT-120 zwave Sensor temperature compensation parameter

Add-ons Bindings
1

I am trying to change parameter 37 on a ZXT-120 - changing positive numbers seems to work fine using digits but to get it to -2 which is what I need, this is ignored once saved so I assume it is in the wrong format.

From the manual:
(0x25)
Sensor temperature compensation (This parameter is used to compensate the temperature error at temperature sensor)
Temperature offset value.
Formula: Display temperature = sensor reading
value + offset value (unit = degree C)
0x00 = 0 degrees C (Default)
0x01 = 1 degrees C
0x02 = 2 degrees C
0x03 = 3 degrees C
0x04 = 4 degrees C
0x05 = 5 degrees C
0xFF = ‐1 degrees C
0xFE = ‐2 degrees C
0xFD = ‐3 degrees C
0xFC = ‐4 degrees C
0xFB = ‐5 degrees C

I have tried the hex as well but wondering if the paramater isnt accepting anything more than a single digit? Ive tried to look at the zwave database but cant seem to work out what to look for on that site.

Can someone help a numty?

Thanks
Andrew

2

@chris can you help?

3

The database looks incorrect - it shows an allowable value of 0 to 255, but I guess this should be -? to +? (maybe +/-127?).

I’ll update later tonight.

4

Hi @chris, the doco shows -5 to +5 as allowed variations - if tis much further out i rekon it should be returned faulty!

5

Ok - is that only degrees then? ie it’s not +/- 50 to allow for tenths of degree? (I think this is what Aeon do). If you have an account on the database, feel free to update if you like…

6

Yes, not even the degrees - a paramater to cater for a variation of the acccuracy of the thermostat (mine is out by 1 degree C)

I did create an account but I cant see where/how to do this (would love to know - have looked on the website but cant see a numty guide)

7

Ok - no problem. I’ve updated the parameter and will feed this into the binding tonight or tomorrow. If it doesn’t solve the issue, then please provide a log and we’ll fix any remaining issues…

Cheers
Chris