OneWire2 binding - missing support for DS1923 and DS1420

Add-ons Bindings
1

Current implementation of OneWire binding in version 2 does not support two sensors

  • DS1420 - this id ID chip used in USB to OneWire adapter. It should report only present state. Family id is 81
  • DS1923 - iButton sensor for reading temperature and humidity. It should fit into multisensor category ms-th. Family id is 41.

I can help with testing it.

2

I have done initial attempt to add this support. I have added to OwBindingConstants.java

        initThingTypeMap.put(OwSensorType.DS1420, THING_TYPE_IBUTTON);
        initThingTypeMap.put(OwSensorType.DS1923, THING_TYPE_MS_TH);

and to OwSensorType.java

    DS1420,
    DS1923,

After upload of the recompiled binding to \\openhabserver\openHAB-share\openhab2-addons\ I got readings for humidity and temperature, however I got also some strange errors

2018-09-28 22:16:47.655 [ERROR] [rg.eclipse.smarthome.binding.onewire] - bundle org.eclipse.smarthome.binding.onewire:0.10.0.201809281925 (219)[binding.onewire] :  Cannot register component
org.osgi.service.component.ComponentException: The component name 'binding.onewire' has already been registered by Bundle 219 (org.eclipse.smarthome.binding.onewire) as Component of Class org.eclipse.smarthome.binding.onewire.internal.OwHandlerFactory

and later after reading values for the first time

2018-09-28 22:16:54.425 [hingStatusInfoChangedEvent] - 'onewire:ms-th:nexx:basement2' changed from ONLINE to OFFLINE (COMMUNICATION_ERROR): refresh exception
2018-09-28 22:16:59.427 [hingStatusInfoChangedEvent] - 'onewire:ms-th:nexx:basement2' changed from OFFLINE (COMMUNICATION_ERROR): refresh exception to ONLINE
2018-09-28 22:17:02.451 [hingStatusInfoChangedEvent] - 'onewire:ms-th:nexx:basement2' changed from ONLINE to OFFLINE (COMMUNICATION_ERROR): refresh exception
2018-09-28 22:17:09.463 [hingStatusInfoChangedEvent] - 'onewire:ms-th:nexx:basement2' changed from OFFLINE (COMMUNICATION_ERROR): refresh exception to ONLINE
2018-09-28 22:17:14.191 [hingStatusInfoChangedEvent] - 'onewire:ms-th:nexx:basement2' changed from ONLINE to OFFLINE (COMMUNICATION_ERROR): refresh exception
... and so on

Is it problem with conflict with the original binding or something more is needed in the binding itself?

3

Open source means you can do it by yourself, so I did. I have added support for those 2 sensors plus fixed some issues. PR should be ready this weekend.

4

@J-N-K, please review.

5

I have seen these error messages before and never could find out why. Usually they disappear after cleaning the cache and restarting OH.