Home » Archived » Eclipse SmartHome » Send Command to another Binding(How to programmatically send a command inside your own binding handler to anther binding)
| Send Command to another Binding [message #1759952] |
Thu, 20 April 2017 11:46  |
 Hanno Wagner
Messages: 12
Registered: April 2017 |
Junior Member |
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Hello everyone,
I am developing an openHAB binding, it already starts and runs fine and I managed to implement most of my needs. But now I am stuck and I hope, you guys can help me.
I want to control an Item of another binding (testing it with the Z-Wave binding) through the interface of my own binding this way:
In PaperUI I have two panels, one for a Z-Wave Node 4: GWPN1 Single-socket PowerNode and one for my binding. The first one has an On/Off switch, which switches the power socket and it works just fine when clicking on it. My binding has a panel with an On/Off switch as well.
Now I want to (1) click on the switch of my binding's panel, which should (2) switch the Z-Wave panel's switch, which should (3) switch the physical power socket.
But only (1) and (2) are working, there is no physical switching triggered.
What is the correct Java method call for sending a command to another binding's Channel, such that is is handled exactly as if someone had clicked in the UI?
In my handler, inside the overridden handleCommand(ChannelUID channelUID, Command command)
void org.eclipse.smarthome.core.thing.binding.BaseThingHandler.postCommand(ChannelUID channelUID, Command command)
void org.eclipse.smarthome.core.thing.binding.BaseThingHandler.handleCommand(ChannelUID channelUID, Command command)
with the correct parameters(ChannelUID of the power socket like this zwave:device:f3f93cbf:node4:switch_binary and Command like org.eclipse.smarthome.core.library.types.OnOffType.ON
I also tried this with the Kodi binding's mute switch and it is not working as well.
The log shows the following:
Clicking on Z-Wave's panel (physical switching working):
2017-04-19 16:49:21.038 [ItemCommandEvent ] - Item 'zwave_device_f3f93cbf_node4_switch_binary' received command ON
2017-04-19 16:49:21.051 [ItemStateChangedEvent ] - zwave_device_f3f93cbf_node4_switch_binary changed from OFF to ON
...
2017-04-19 16:49:30.171 [ItemCommandEvent ] - Item 'zwave_device_f3f93cbf_node4_switch_binary' received command OFF
2017-04-19 16:49:30.194 [ItemStateChangedEvent ] - zwave_device_f3f93cbf_node4_switch_binary changed from ON to OFF
Clicking on my binding's (jade_smarthomeagent) panel (physical switching not working):
2017-04-19 16:50:55.454 [ItemCommandEvent ] - Item 'jade_smarthomeagent_d5d1eec3_on' received command ON
2017-04-19 16:50:55.465 [ItemCommandEvent ] - Item 'zwave_device_f3f93cbf_node4_switch_binary' received command ON
2017-04-19 16:50:55.476 [ItemStateChangedEvent ] - jade_smarthomeagent_d5d1eec3_on changed from OFF to ON
2017-04-19 16:50:55.488 [ItemStateChangedEvent ] - zwave_device_f3f93cbf_node4_switch_binary changed from OFF to ON
...
2017-04-19 16:51:58.448 [ItemCommandEvent ] - Item 'jade_smarthomeagent_d5d1eec3_on' received command OFF
2017-04-19 16:51:58.464 [ItemCommandEvent ] - Item 'zwave_device_f3f93cbf_node4_switch_binary' received command OFF
2017-04-19 16:51:58.473 [ItemStateChangedEvent ] - jade_smarthomeagent_d5d1eec3_on changed from ON to OFF
2017-04-19 16:51:58.481 [ItemStateChangedEvent ] - zwave_device_f3f93cbf_node4_switch_binary changed from ON to OFF
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| Re: Send Command to another Binding [message #1759960 is a reply to message #1759955] |
Thu, 20 April 2017 14:07  |
Hanno Wagner
Messages: 12
Registered: April 2017 |
Junior Member |
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Hi Henning,
thank you very much for your swift reply!
Huh, that is bad news for me  But it should be possible to extend openHAB/ESH by another type of bundle (not "binding"), which implements that functionality? Actually, I did implement a complete "mirroring" facility, which receives updates for channels to display them in my binding, by making a new class extending org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber and creating a new component/service with <provide interface="org.eclipse.smarthome.core.events.EventSubscriber" /> (see implementation here: https://github.com/pokerazor/openhab-binding-jade/blob/master/src/de.unidue.stud.sehawagn.openhab.binding.jade/src/main/java/de/unidue/stud/sehawagn/openhab/channelmirror/ChannelMirrorImpl.java).
This solution is working quite smoothly and I was under the impression that this wouldn't be a hack but using API functions?
So, since BaseThingHandler#postCommand doesn't work for me as expected, I will probably have to dig deep into the code and analyse... how can I set log levels to specific bundles?
Cheers,
Hanno
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| Re: Send Command to another Binding [message #1759972 is a reply to message #1759960] |
Thu, 20 April 2017 15:26 |
Simon Kaufmann
Messages: 51
Registered: January 2011 |
Member |
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Have you considered using the rule engine for that? To me it sounds like a perfect use-case for it. Just define a rule that listens to state changes on one item and send the received command to the other one. In that way it's even nicely configurable. If you would hard-code stuff like that into your binding, then nobody else can use it (unless they name their things exactly as you did...). This actually is one of the core fundamentals of this project: Bindings introduce a way how to talk to real-world devices, and on the items/rules layer you make them the devices interact with each other and do all the cool & magic stuff.
[Updated on: Thu, 20 April 2017 15:27] Report message to a moderator |
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| Re: Send Command to another Binding [message #1759981 is a reply to message #1759960] |
Thu, 20 April 2017 20:01 |
Hanno Wagner
Messages: 12
Registered: April 2017 |
Junior Member |
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I did another check, starting openHAB in development mode from the eclipse IDE and used the Kodi binding, trying 3 things:
1) Switching Mute from Kodi Binding's panel Off/On
2) Switching the "On" Channel of my binding (jade_smarthomeagent) Off/On, the line [INFO ] [.o.b.j.h.SmartHomeAgentHandler:231 ] - handleCommand(... is the place, where I issue the postCommand()
3) Switching Mute directly in Kodi On/Off
Still, everything looks right in the PaperUI, but Kodi is not actually switching to mute
Here is the log, I removed entries wich had nothing to to with the issue and inserted blank lines between each switching event:
2017-04-20 21:49:47.727 [DEBUG] [io.rest.core.item.ItemResource:288 ] - Received HTTP POST request at 'items/kodi_kodi_e6a65b3b_mute' with value 'OFF'.
2017-04-20 21:49:47.730 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'kodi_kodi_e6a65b3b_mute' received command OFF
2017-04-20 21:49:47.730 [DEBUG] [.c.thing.internal.ThingManager:355 ] - Delegating command 'OFF' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:47.731 [DEBUG] [.k.i.protocol.KodiClientSocket:194 ] - send message: {"jsonrpc":"2.0","id":37,"method":"Application.SetMute","params":{"mute":false}}
2017-04-20 21:49:47.734 [DEBUG] [.k.i.protocol.KodiClientSocket:139 ] - Message received from server: {"id":37,"jsonrpc":"2.0","result":false}
2017-04-20 21:49:47.734 [DEBUG] [.k.i.protocol.KodiClientSocket:142 ] - Response received from server: {"id":37,"jsonrpc":"2.0","result":false}
2017-04-20 21:49:47.735 [DEBUG] [.k.i.protocol.KodiClientSocket:224 ] - callMethod returns {"id":37,"jsonrpc":"2.0","result":false}
2017-04-20 21:49:47.736 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to OFF
2017-04-20 21:49:47.736 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'OFF' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:47.737 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from ON to OFF
2017-04-20 21:49:49.733 [DEBUG] [io.rest.core.item.ItemResource:288 ] - Received HTTP POST request at 'items/kodi_kodi_e6a65b3b_mute' with value 'ON'.
2017-04-20 21:49:49.735 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'kodi_kodi_e6a65b3b_mute' received command ON
2017-04-20 21:49:49.736 [DEBUG] [.c.thing.internal.ThingManager:355 ] - Delegating command 'ON' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:49.736 [DEBUG] [.k.i.protocol.KodiClientSocket:194 ] - send message: {"jsonrpc":"2.0","id":38,"method":"Application.SetMute","params":{"mute":true}}
2017-04-20 21:49:49.766 [DEBUG] [.k.i.protocol.KodiClientSocket:139 ] - Message received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":true,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:49:49.766 [DEBUG] [.k.i.protocol.KodiClientSocket:149 ] - Event received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":true,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:49:49.768 [DEBUG] [.k.i.protocol.KodiClientSocket:139 ] - Message received from server: {"id":38,"jsonrpc":"2.0","result":true}
2017-04-20 21:49:49.768 [DEBUG] [.k.i.protocol.KodiClientSocket:142 ] - Response received from server: {"id":38,"jsonrpc":"2.0","result":true}
2017-04-20 21:49:49.768 [DEBUG] [.k.i.protocol.KodiClientSocket:224 ] - callMethod returns {"id":38,"jsonrpc":"2.0","result":true}
2017-04-20 21:49:49.769 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to ON
2017-04-20 21:49:49.770 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'ON' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:49.771 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_volume updated to 86
2017-04-20 21:49:49.772 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to ON
2017-04-20 21:49:49.773 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from OFF to ON
2017-04-20 21:49:51.866 [DEBUG] [io.rest.core.item.ItemResource:288 ] - Received HTTP POST request at 'items/jade_smarthomeagent_2337767d_on' with value 'OFF'.
2017-04-20 21:49:51.869 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'jade_smarthomeagent_2337767d_on' received command OFF
2017-04-20 21:49:51.870 [DEBUG] [.c.thing.internal.ThingManager:355 ] - Delegating command 'OFF' for item 'jade_smarthomeagent_2337767d_on' to handler for channel 'jade:smarthomeagent:2337767d:on'
2017-04-20 21:49:51.870 [INFO ] [.o.b.j.h.SmartHomeAgentHandler:231 ] - handleCommand(jade:smarthomeagent:2337767d:on==ACTUATE_MIRROR_CHANNEL, OFF) => postCommand(kodi:kodi:e6a65b3b:mute, OFF)
2017-04-20 21:49:51.871 [INFO ] [smarthome.event.ItemStateEvent:43 ] - jade_smarthomeagent_2337767d_on updated to OFF
2017-04-20 21:49:51.871 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'OFF' for item 'jade_smarthomeagent_2337767d_on' to handler for channel 'jade:smarthomeagent:2337767d:on'
2017-04-20 21:49:51.872 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'kodi_kodi_e6a65b3b_mute' received command OFF
2017-04-20 21:49:51.873 [INFO ] [s.event.ItemStateChangedEvent :43 ] - jade_smarthomeagent_2337767d_on changed from ON to OFF
2017-04-20 21:49:51.874 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to OFF
2017-04-20 21:49:51.875 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'OFF' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:51.880 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from ON to OFF
2017-04-20 21:49:53.183 [DEBUG] [io.rest.core.item.ItemResource:288 ] - Received HTTP POST request at 'items/jade_smarthomeagent_2337767d_on' with value 'ON'.
2017-04-20 21:49:53.185 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'jade_smarthomeagent_2337767d_on' received command ON
2017-04-20 21:49:53.186 [DEBUG] [.c.thing.internal.ThingManager:355 ] - Delegating command 'ON' for item 'jade_smarthomeagent_2337767d_on' to handler for channel 'jade:smarthomeagent:2337767d:on'
2017-04-20 21:49:53.186 [INFO ] [.o.b.j.h.SmartHomeAgentHandler:227 ] - handleCommand(jade:smarthomeagent:2337767d:on==ACTUATE_MIRROR_CHANNEL, ON) => postCommand(kodi:kodi:e6a65b3b:mute, ON)
2017-04-20 21:49:53.188 [INFO ] [smarthome.event.ItemStateEvent:43 ] - jade_smarthomeagent_2337767d_on updated to ON
2017-04-20 21:49:53.188 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'ON' for item 'jade_smarthomeagent_2337767d_on' to handler for channel 'jade:smarthomeagent:2337767d:on'
2017-04-20 21:49:53.190 [INFO ] [arthome.event.ItemCommandEvent:43 ] - Item 'kodi_kodi_e6a65b3b_mute' received command ON
2017-04-20 21:49:53.192 [INFO ] [s.event.ItemStateChangedEvent :43 ] - jade_smarthomeagent_2337767d_on changed from OFF to ON
2017-04-20 21:49:53.193 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to ON
2017-04-20 21:49:53.194 [DEBUG] [.c.thing.internal.ThingManager:405 ] - Delegating update 'ON' for item 'kodi_kodi_e6a65b3b_mute' to handler for channel 'kodi:kodi:e6a65b3b:mute'
2017-04-20 21:49:53.194 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from OFF to ON
2017-04-20 21:49:58.911 [DEBUG] [.k.i.protocol.KodiClientSocket:139 ] - Message received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":false,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:49:58.911 [DEBUG] [.k.i.protocol.KodiClientSocket:149 ] - Event received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":false,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:49:58.913 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_volume updated to 86
2017-04-20 21:49:58.917 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to OFF
2017-04-20 21:49:58.918 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from ON to OFF
2017-04-20 21:50:04.134 [DEBUG] [.k.i.protocol.KodiClientSocket:139 ] - Message received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":true,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:50:04.134 [DEBUG] [.k.i.protocol.KodiClientSocket:149 ] - Event received from server: {"jsonrpc":"2.0","method":"Application.OnVolumeChanged","params":{"data":{"muted":true,"volume":86.0},"sender":"xbmc"}}
2017-04-20 21:50:04.136 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_volume updated to 86
2017-04-20 21:50:04.138 [INFO ] [smarthome.event.ItemStateEvent:43 ] - kodi_kodi_e6a65b3b_mute updated to ON
2017-04-20 21:50:04.139 [INFO ] [s.event.ItemStateChangedEvent :43 ] - kodi_kodi_e6a65b3b_mute changed from OFF to ON
[Updated on: Thu, 20 April 2017 20:03] Report message to a moderator |
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| Re: Send Command to another Binding [message #1759982 is a reply to message #1759981] |
Thu, 20 April 2017 20:17 |
Hanno Wagner
Messages: 12
Registered: April 2017 |
Junior Member |
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Hi Simon, also thanks for your quick response.
Yes, I have considered and tried the rule engine, but I think, it is not quite the right solution to my challenge.
The user would need to set up two rules, one for On and one for Off. Also, I want to use meter readings from the "low level" binding. My binding would work as a kind of high-level abstraction (say, a generic washing machine connected to a Z-Wave power socket), but access the low level binding to read Watts and switch the socket on or off, but the user would for example set a time window for the washing machine on a somewhat "higher" level.
But yes, you're right, I don't want to hard code any channels, obviously. Currently my binding/thing has two configuration fields, one for the sensor-channel and one for the actuator channel. Those config properties are read on initialization and used to tap into the command/event bus.
I would like to mimic the rule engine's way to issues commands to arbitrary channels.
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| Re: Send Command to another Binding [message #1760050 is a reply to message #1760027] |
Fri, 21 April 2017 13:29 |
Hanno Wagner
Messages: 12
Registered: April 2017 |
Junior Member |
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Hi Henning,
thank you very much for your detailed explanation!
I was working in parallel and managed to make the approach I tried working. postCommand() was the right call, I only confused the channelUID parameter, because it is meant to be the SOURCE channel, not the target channel/item (seems, I'm also still not confident enough with the terms yet), and the ThingManager later filters out commands which seem to originate from itself. So what I did, I added an additional ItemChannelLink to the linkRegistry and then it worked!  (if it is of interest, it is now available in the aforementioned Github repository)
That sounds a little bit similar to the hue emulation approach. Though to me it looks quite stable and clean, so I'm hesitant to call it hacky  But I can understand, that it is using the framework in a different way than expected and intended and may break in the future.
The new rule engine will probably become the "correct" solution for me in the future, extending it on the Java source side, but I wasn't able to find it's source to learn how it works, can you provide a link? As you already said, using only the documentation seems quite hard to me, it's always helpful to look at a working example.
The classic rule engine won't work for me because you can't interface with it programmatically.
The REST API is a little bit too abstract for my purpose, I would like to directly access the Java objects.
Yes, I'm still not sure whether a "binding" would be the entirely correct approach/extension type, but on the other hand the metaphor is quite OK, because to the user it looks like any other smart device. I try to "smartify" dumb devices by turning your usual washing machine into a "smart" one through an arbitrary switchable power socket.
I will try to figure out, what the best way may be.
Thanks again for your help!
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