Domoticz

Hi,

I connectet some DS18B20 temperature sensors to the Raspi GPIO port and it´s working fine.
But when I disconnect the dataline, it`s not recognized by Domoticz.

Is there a possibility that Domoticz responds to a missing sensor?

Best Regards
@MosWare

When a sensor hasn't been updated in X minutes it will we marked red in Domoticz. You can change the timeout in settings-other-timout for sensor.

Thank you for your answer.

It is right, that the value is marked red, but the value didn´t change.

How can I set a switch (for example an alarm lamp) while
Sensor communication is lost?

Best regards
@MosWare

Make Lua script and monitor lastupdate. There is example on wiki how to monitor garage door.

Hmm, but on loss of communication freezes the value.
There is no difference between a freeze value an a real stable value.

I think this should be realized by Domoticz, without the need of writing a LUA script for this elementary function.
When communication lost, Domoticz could set the value to -1000 °C. So it would be very easy to implement for anyone.

Or, is there a way to request a sensor time out?

Best regards
@MosWare

There is no need to use false values to detect a missing sensor. That would also mess upp the temperature logs.
The lastupdate value tells you when the sensor was last updated.
So you can make a LUA-script that reacts when a sensor has not been updated for 15 minutes for example.

Also, Domoticz colors sensors in read when they have not been updated within a time that you can select in settings.

My own 'lessons learned' for a disconnected DS18B20: see http://www.domoticz.com/forum/viewtopic ... 948#p54271