Xiaomi Mi Smart Home Binding - Smart Plugs Error

swinsmore · December 18, 2017, 12:42pm

Hi - I have a Xiaomi gateway with a few zigbee smart sockets and temperature sensors. I can see all of the items (discovered via Paper UI) in the console as well as the updated values from power consumption and temperature.

However whenever I try and send a command to a device i.e. toggle power via a switch I receive a Null Pointer exception in openHAB. I don’t not have any other errors. I have provided the developer key to the gateway configuration.

Any ideas?

2017-12-18 23:34:05.811 [ERROR] [ome.core.thing.internal.ThingManager] - Exception occurred while calling handler: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:220)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.callAsynchronous(SafeMethodCaller.java:189)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:83)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:67)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.thing.internal.ThingManager.receiveCommand(ThingManager.java:374)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber.receive(AbstractItemEventSubscriber.java:47)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:192)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:1)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller$CallableWrapper.call(SafeMethodCaller.java:181)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at java.util.concurrent.FutureTask.run(Unknown Source)[:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)[:1.8.0_151]
	at java.lang.Thread.run(Unknown Source)[:1.8.0_151]
Caused by: java.lang.NullPointerException
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.toJsonValue(XiaomiBridgeHandler.java:319)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.sendCommandToBridge(XiaomiBridgeHandler.java:257)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.sendCommandToBridge(XiaomiBridgeHandler.java:239)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.writeToDevice(XiaomiBridgeHandler.java:266)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiActorPlugHandler.execute(XiaomiActorPlugHandler.java:42)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiDeviceBaseHandler.handleCommand(XiaomiDeviceBaseHandler.java:97)[185:org.openhab.binding.mihome:2.1.0]
	at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:377)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:1)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:218)[98:org.eclipse.smarthome.core:0.9.0.b5]
	... 12 more

Simsal · December 18, 2017, 2:38pm

Plz post your thing and item definitions and corresponding rules

swinsmore · December 20, 2017, 3:48am

Thanks Simon - I installed the binding and discovered/created the items using Paper UI so I cant see the .items/.things in the usual openHAB/config location.

Should I delete them and try creating them manually?

Cheers

swinsmore · January 8, 2018, 3:21am

Hi All, now that the holiday season is over I can add some more detail to this post. It looks to me that the toggle command (ON/OFF) is sent successfully, but the logs show that as soon as the command is sent in the event log the Null Point error occurs on the server - see 14:10:24.449 .

Any ideas of how or where to troubleshoot? Currently I can see the values for the Xiaomi devices i.e. status / power consumption with no issues in OpenHab, I even have persistence working to graph the consumption over time. The only sticky point is I cant send commands.

Below are the logs from my event and OpenHab files;

Event Logs

2018-01-08 14:10:24.449 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command OFF
2018-01-08 14:10:24.460 [ItemStateChangedEvent     ] - mihome_sensor_plug_158d0001debc5b_power changed from ON to OFF

2018-01-08 14:10:36.196 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:36.199 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:36.203 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:36.311 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:38.970 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:38.971 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:38.972 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.018 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:39.230 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:39.233 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:39.236 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.239 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:39.404 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:39.409 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.410 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:39.439 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:39.580 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:39.581 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:39.582 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.626 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:39.751 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:39.755 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.758 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:39.799 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:39.899 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:39.900 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:39.901 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:39.938 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:40.116 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:40.121 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:40.125 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:40.141 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:40.188 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:40.193 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:40.196 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:40.271 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:40.339 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:40.340 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:40.341 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:40.377 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH
2018-01-08 14:10:40.561 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_power' received command REFRESH
2018-01-08 14:10:40.566 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_inUse' received command REFRESH
2018-01-08 14:10:40.566 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_loadPower' received command REFRESH
2018-01-08 14:10:40.589 [ItemCommandEvent          ] - Item 'mihome_sensor_plug_158d0001debc5b_powerConsumed' received command REFRESH

OpenHAB Log

2018-01-08 14:10:24.459 [ERROR] [ome.core.thing.internal.ThingManager] - Exception occurred while calling handler: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:220)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.callAsynchronous(SafeMethodCaller.java:189)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:83)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:67)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.thing.internal.ThingManager.receiveCommand(ThingManager.java:374)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber.receive(AbstractItemEventSubscriber.java:47)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:192)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:1)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller$CallableWrapper.call(SafeMethodCaller.java:181)[98:org.eclipse.smarthome.core:0.9.0.b5]
	at java.util.concurrent.FutureTask.run(Unknown Source)[:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)[:1.8.0_151]
	at java.lang.Thread.run(Unknown Source)[:1.8.0_151]
Caused by: java.lang.NullPointerException
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.toJsonValue(XiaomiBridgeHandler.java:319)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.sendCommandToBridge(XiaomiBridgeHandler.java:257)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.sendCommandToBridge(XiaomiBridgeHandler.java:239)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiBridgeHandler.writeToDevice(XiaomiBridgeHandler.java:266)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiActorPlugHandler.execute(XiaomiActorPlugHandler.java:42)[185:org.openhab.binding.mihome:2.1.0]
	at org.openhab.binding.mihome.handler.XiaomiDeviceBaseHandler.handleCommand(XiaomiDeviceBaseHandler.java:97)[185:org.openhab.binding.mihome:2.1.0]
	at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:377)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:1)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
	at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:218)[98:org.eclipse.smarthome.core:0.9.0.b5]
	... 12 more

Thank you for your help.

namraccr · January 8, 2018, 3:28am

You can also look at these definitions in the Karaf console, I believe.

swinsmore · January 8, 2018, 5:17am

Thanks namraccr, are you familiar with the commands in Karaf to view these?

namraccr · January 9, 2018, 5:20am

I believe they’re:

smarthome:items list
smarthome:things list

swinsmore · January 15, 2018, 5:56am

Thanks namraccr, after some more testing this error only occurs when trying to send commands to the Xiaomi Smart Plugs. I can successfully send commands to the Xiamo Gateway i.e. turn on the light with no issues.

I would really appreciate some help on this one, as this is the last kind of significant functionally I am missing (cant get working) for my entire home automation solution.

Thank you

namraccr · January 15, 2018, 6:47am

It’s not clear to me that there’s anything actually wrong here. Your items are getting the updates you expect, right?

You really should get a debug log and see if it sheds any light on which item is causing the error message.

swinsmore · January 28, 2018, 7:58am

Hi All - just to round out this thread, a quick update that I was able to solve this problem by using the Zulu Java Platform instead of the standard Oracle JRE/JDK.

I got the idea for testing this theory in the installation overview of the openHAB docs; https://docs.openhab.org/installation/

fandy · February 18, 2018, 11:04am

Im using Rasberry Pi, do you have any idea how about to change to oracle JRE?