Cannot change 1-wire temperature sensor poll period

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Posts: 7
Joined: Wednesday 06 June 2018 19:00
Target OS: Linux
Domoticz version:

Cannot change 1-wire temperature sensor poll period

Post by Sipowitz » Monday 05 November 2018 22:22


I am currently running Domoticz version 4.10145 on a Raspberry Pi 2. I am using a 1 Wire Pi Zero HAT to connect up 9 1-wire temperature probes which are connected to my central heating system.

I believe I may have found a bug in that no matter what settings I use for the "Sensor Poll Period" setting in the hardware setup page my sensors update at roughly 30 second intervals.

Code: Select all

 2018-11-05 20:03:09.574 (1wire) Temp (Hot Water Flow)
2018-11-05 20:03:40.350 (1wire) Temp (Central Heating Return)
2018-11-05 20:04:11.171 (1wire) Temp (Hot Water Return)
2018-11-05 20:04:41.991 (1wire) Temp (Central Heating Flow)
2018-11-05 20:05:12.811 (1wire) Temp (Hot Water Tank - Mid)
2018-11-05 20:05:43.630 (1wire) Temp (Hot Water Tank - Bottom)
2018-11-05 20:06:14.452 (1wire) Temp (Hot Water Tank - Upper Mid)
2018-11-05 20:06:45.272 (1wire) Temp (Hot Water Tank - Lower Mid)
2018-11-05 20:07:16.096 (1wire) Temp (Hot Water Tank - Top)
2018-11-05 20:08:20.673 (1wire) Temp (Hot Water Flow)
2018-11-05 20:08:51.442 (1wire) Temp (Central Heating Return)
2018-11-05 20:09:22.261 (1wire) Temp (Hot Water Return)
2018-11-05 20:09:53.082 (1wire) Temp (Central Heating Flow)
2018-11-05 20:10:23.907 (1wire) Temp (Hot Water Tank - Mid)
2018-11-05 20:10:54.731 (1wire) Temp (Hot Water Tank - Bottom) 
The above log snippet is with both "Sensor Poll Period" and "Switch Poll Period" set to 10 milliseconds. I have tried various settings up to 1 minute and the update interval seems to remain at roughly 30 seconds.

If I change the settings to say 10 milliseconds and then press the update button I can see the 1-wire threads starting and stopping and then the sensors update more frequently, however they soon begin the 30 second cycle again:

Code: Select all

 2018-11-05 19:49:24.262 Status: 1-Wire: Sensor thread terminating
2018-11-05 19:49:24.262 Status: 1-Wire: Switch thread terminating
2018-11-05 19:49:24.273 Status: Using 1-Wire support (OWFS)...
2018-11-05 19:49:24.262 Error: RxQueue: cannot retrieve hardware with id: 8
2018-11-05 19:54:52.529 (1wire) Temp (Hot Water Tank - Mid)
2018-11-05 19:55:23.364 (1wire) Temp (Hot Water Tank - Bottom)
2018-11-05 19:55:54.189 (1wire) Temp (Hot Water Tank - Upper Mid)
2018-11-05 19:56:25.020 (1wire) Temp (Hot Water Tank - Lower Mid) 
I'm at a loss as to what to do as the domoticz log does not provide much information. Is there a lower level log file I could view?

Many Thanks


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