[SOLVED] MCP23017 Binding - general

Add-ons Bindings
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1

Hello community,

I just started a few weeks ago with setting up openhabian (openHAB 2.5.2-1 (Release Build)) on my raspberry pi 4 and it seems to work fine. After that I installed the MCP23017-Binding with the main goal to switch relays on and of.

  1. My first step was to build a test setup (including relays, opt couplers, button) etc. which work perfect just using Python. So far, so good => Next step.
  2. I installed wiringpi and the MCP23017 binding.
  3. I build the following side map:
sitemap testsetup label="Testsetup" {
    Frame label="Testsetup" {
        Switch item=living_room_led_switch //mappings = ["ON"="ON", "OFF"="OFF"]
    }
}
  1. I build the following thing based on the official readme for the binding:
Thing mcp23017:mcp23017:chipA  "MCP23017 chip A" [address=20,bus=1] {
    Type output_pin : output#A0 [default_state="LOW", active_low="y"]

    Type input_pin : input#B0 [pull_mode="OFF"]
}
  1. I build the following items (also based on the official readme):
Switch living_room_led_switch "Living room LED switch"  {channel="mcp23017:mcp23017:chipA:output#A0"}
Contact living_room_led_contact "Living room LED contact"  {channel="mcp23017:mcp23017:chipA:input#B0"}
  1. Last but not least I implemented the following rule which is also based on the official readme:
rule "living_room_led contact"
when
    Item living_room_led_contact changed to OPEN
then
    living_room_led_switch.sendCommand(living_room_led_switch.state != ON ? ON : OFF)
end

Unfortunately it did not work. I got a switch which I can use on basic ui but nothing happens. As it works in python I think I’ve made some other mistake. It would be great, if someone could help me with it even if it is a good link with a longer readme than the official one.

Thanks a lot and best regards
BrainPain

2

Hello there,

is anything missing in my explanation?

Best regards
BrainPain

3

Hey, it is me again,

still trying to figure out what is going on. I searched for a solution and tryed:
https://community.openhab.org/t/solved-mcp23017-binding-does-not-work/87867

After I reboot everything I still get the following log:

2020-03-04 20:22:50.400 [ERROR] [nal.common.AbstractInvocationHandler] - An error occurred while calling method 'ThingHandler.handleCommand()' on 'org.openhab.binding.mcp23017.handler.Mcp23017Handler@1d6e0e9': null

java.lang.NullPointerException: null

	at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionPin(GpioControllerImpl.java:545) ~[?:?]

	at com.pi4j.io.gpio.impl.GpioControllerImpl.provisionDigitalOutputPin(GpioControllerImpl.java:717) ~[?:?]

	at org.openhab.binding.mcp23017.handler.Mcp23017PinStateHolder.initializeOutputPin(Mcp23017PinStateHolder.java:71) ~[?:?]

	at org.openhab.binding.mcp23017.handler.Mcp23017PinStateHolder.getOutputPin(Mcp23017PinStateHolder.java:59) ~[?:?]

	at org.openhab.binding.mcp23017.handler.Mcp23017Handler.handleOutputCommand(Mcp23017Handler.java:108) ~[?:?]

	at org.openhab.binding.mcp23017.handler.Mcp23017Handler.handleCommand(Mcp23017Handler.java:80) ~[?:?]

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222]

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222]

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222]

	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222]

	at org.eclipse.smarthome.core.internal.common.AbstractInvocationHandler.invokeDirect(AbstractInvocationHandler.java:152) [bundleFile:?]

	at org.eclipse.smarthome.core.internal.common.InvocationHandlerSync.invoke(InvocationHandlerSync.java:59) [bundleFile:?]

	at com.sun.proxy.$Proxy143.handleCommand(Unknown Source) [?:?]

	at org.eclipse.smarthome.core.thing.internal.profiles.ProfileCallbackImpl.handleCommand(ProfileCallbackImpl.java:74) [bundleFile:?]

	at org.eclipse.smarthome.core.thing.internal.profiles.SystemDefaultProfile.onCommandFromItem(SystemDefaultProfile.java:48) [bundleFile:?]

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222]

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222]

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222]

	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222]

	at org.eclipse.smarthome.core.internal.common.AbstractInvocationHandler.invokeDirect(AbstractInvocationHandler.java:152) [bundleFile:?]

	at org.eclipse.smarthome.core.internal.common.Invocation.call(Invocation.java:52) [bundleFile:?]

	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222]

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]

	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]

==> /var/log/openhab2/events.log <==

2020-03-04 20:22:50.426 [vent.ItemStateChangedEvent] - living_room_led_switch changed from OFF to ON

==> /var/log/openhab2/openhab.log <==

2020-03-04 20:25:43.446 [WARN ] [sitemap.internal.SitemapProviderImpl] - Filename `Testsetup.sitemap` does not match the name `testsetup` of the sitemap - please fix this as you might see unexpected behavior otherwise.

I don’t understand what to do. Please can anybody help me?

Thanks and regards
Michael

4

Solved by uninstalling the binding and installing it again via. Paper UI.