How to modify temperature sensor figures

[gcaley (Grant Caley)]

Hi all,

New to OpenHab (was a Domoticz user). I have some cheap temp sensors that report incorrect temperatures. Previously in Domoticz I would base line next to my NetAtmo and then app a correction to the sensor (which Domoticz supports).

How would I do this in OH2.

[george.erhan]

@rlkoshak’s design pattern is a perfect solution for what you need:

Design Pattern: Proxy Item

Please see Design Pattern: What is a Design Pattern and How Do I Use Them for information on what a DP is and how to use them. Problem Statement Often one faces one or more of the following situations: the need to perform additional logic before sending a command to a device the need to send a command to multiple devices based on a single event the need to do something different based on the state of one or more other Items the channel to update the state of an Item and the channel to send c…

[gcaley (Grant Caley)]

Thanks for that. I’ll have a look at what this offers.

[dan12345 (Dan)]

yes, one of two ways:

(1) a cron every 30 minutes (say) which reads the sensors and then writes corrected values to proxy Items. The proxy items are then displayed in sitemap, graphed by persistence services, and used in other rules

(2) a rule that runs whenever a sensor changes, and immediately updates the proxy items (I don’t do that because it seems inefficient to have rules firing all the time when thermostats don’t need second-by-second accuracy).

Dan

[gcaley (Grant Caley)]

Thanks dan12345