MeterReader Binding

I installed the MeterReader Binding.
The sml usb reader is now online and the things are automatically generated.

But how can I use it?
How is the syntax for the items?

Can anybody help me please?

I have the meterbinding running since a few months now for my two powermeters (sml) with infrared readers from, it worked great alle the time, but since 1 or 2 weeks the meterreder binding stops working.

Last time was 2 days ago, i got this error:

2018-01-13 17:51:08.182 [ERROR] [ader.internal.sml.SmlSerialConnector] - Error at SerialConnector.getMeterValuesInternal: wrong crc

2018-01-13 17:51:08.197 [ERROR] [ing.meterreader.internal.MeterDevice] - meterreader:meter:770bed4f: Error during receive values from device: wrong crc

2018-01-13 17:51:08.197 [ERROR] [erreader.internal.MeterReaderHandler] - Failed to read SML wrong crc

	at org.openmuc.jsml.transport.MessageExtractor.waitForStopSequence( [203:org.openhab.binding.meterreader:]

	at org.openmuc.jsml.transport.MessageExtractor.getSmlMessage( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.internal.sml.SmlSerialConnector.getMeterValuesInternal( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.connectors.ConnectorBase.getMeterValues( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.connectors.ConnectorBase.getMeterValues( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.internal.MeterDevice.readValues( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.internal.MeterReaderHandler.updateOBISValue( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.internal.MeterReaderHandler.access$0( [203:org.openhab.binding.meterreader:]

	at org.openhab.binding.meterreader.internal.MeterReaderHandler$ [203:org.openhab.binding.meterreader:]

	at java.util.concurrent.Executors$ [?:?]

	at java.util.concurrent.FutureTask.runAndReset( [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301( [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ [?:?]

	at java.util.concurrent.ThreadPoolExecutor.runWorker( [?:?]

	at java.util.concurrent.ThreadPoolExecutor$ [?:?]

	at [?:?]

After that, the binding stoped working. I have two powermeters. The week before all two readers stopped working too.

I made a service restart of openhab2 and i got new values immediately.

Was there a change in the code? I have installed openhab 2.3 snapshot #1177. I made an update before about at 2nd january 2018, with this version i also got this error for one time.

I just checked my persitence: First error was recorded on christmas monday 25.12.2017. Now this is the 3rd time the readers stopped working. I didn´t see it at once, so i got no new values for some days.