Strange behavior with dual temperaturesensor
Posted: Friday 06 December 2019 15:27
Hi,
I am using T+H sensor from Telldus https://telldus.com/se/produkt/termohyg ... or-433mhz/ which normally works very well with my RFXtrx433E Version: Pro1/1041 and latest official Domoticz V4.10717
In my case, I use two of these sensors to monitor the temperature of 2 rooms and their radiators (I used the "outside" sensor mounted firmly on the intake to the radiator)
From time to time I get corrupted values and I have believed that there was some interference with some neighboring sensor that is causing the issue, but there seems to be a bug somewhere. I do not know if it is due to the sensor or a bug in the system
What I can see now that I have analysed the data carefully is that when the temperature of the "outside" sensor is within a certain range, the "inside" temperature becomes the "outside", but with an offset.
Sensor 1: 14.5 <= T <= 17.1 and the delta is 2.0 degrees, i.e. T_Inside = T_Outside - 2.0
Sensor 2: ? <= T <= 15.8 and the delta is 0.8 degrees, i.e. T_Inside = T_Outside - 0.8
There are three possible sources to this bug.
1. The sensor it self.
2. The receiver RFXtrx433E is interpreting it wrongly somehow
3. Domotics interprets RFXtrx433 wrongly
Personally I belive that it is either case 2 or 3 that are the most likely candidates to the bug.
Anyone else having the same issue?
I am using T+H sensor from Telldus https://telldus.com/se/produkt/termohyg ... or-433mhz/ which normally works very well with my RFXtrx433E Version: Pro1/1041 and latest official Domoticz V4.10717
In my case, I use two of these sensors to monitor the temperature of 2 rooms and their radiators (I used the "outside" sensor mounted firmly on the intake to the radiator)
From time to time I get corrupted values and I have believed that there was some interference with some neighboring sensor that is causing the issue, but there seems to be a bug somewhere. I do not know if it is due to the sensor or a bug in the system
What I can see now that I have analysed the data carefully is that when the temperature of the "outside" sensor is within a certain range, the "inside" temperature becomes the "outside", but with an offset.
Sensor 1: 14.5 <= T <= 17.1 and the delta is 2.0 degrees, i.e. T_Inside = T_Outside - 2.0
Sensor 2: ? <= T <= 15.8 and the delta is 0.8 degrees, i.e. T_Inside = T_Outside - 0.8
There are three possible sources to this bug.
1. The sensor it self.
2. The receiver RFXtrx433E is interpreting it wrongly somehow
3. Domotics interprets RFXtrx433 wrongly
Personally I belive that it is either case 2 or 3 that are the most likely candidates to the bug.
Anyone else having the same issue?