Heyy @TimO (are you really called the same as me?) Thanks for getting back to me!

1. Thanks!
2. Nope, for now I just used the simple mode so no .items file.
3. Yeah, I agree it can make it feel a bit more cluttered. But then again, battery is also not used in every device (and useless in wall powered sensors). Also other channels you might not use them all as well. For example, I use S_MULTIMETER for voltage and current (because weirdly S_POWER lacks that) but impedance is an useless/meaningless channel here.

Heyy @TimO (are you really called the same as me?) Thanks for getting back to me!

1. Thanks!
2. Nope, for now I just used the simple mode so no .items file.
3. Yeah, I agree it can make it feel a bit more cluttered. But then again, battery is also not used in every device (and useless in wall powered sensors). Also other channels you might not use them all as well. For example, I use S_MULTIMETER for voltage and current (because weirdly S_POWER lacks that) but impedance is an useless/meaningless channel here.

@TimO Thanks for your answers!

1. The symbol for hour really is a small h https://en.wikipedia.org/wiki/Kilowatt_hour
2. Great! And you'r right, it's indeed var, not VAR (weirdly enough...) Right on time for the demo
3. I've lost where I can check that But weird thing is, OpenHAB does show it with decimals, they're just zero most of the time...
4. Could do, I just used it with S_POWER because the MySensors doc said they should work with any device. Which I think does make sense in order not to cluther things with S_CUSTOMS. But then again, S_POWER having a V_VOLTAGE also makes sense

I'm trying to make a energy/Watt meter based on a ATM90E26 to send Watt, VAR, VA etc to OpenHab. But I'm running into two problems.

First, not all channels show up in OpenHab. Only Watt, KWH (which should be named kWh), Battery level and Last Update show up from my S_POWER sensor. VAR, VA and PowerFactor are missing. Also V_VAR1 (the custom values) are not showing.

Second problem is with decimal places. From my sensor I send a value with a decimal place. The log shows me:
11074 TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=38,pt=0,l=6,sg=0,ft=0,st=OK:236.16
for a voltage of 236.16V. Only OpenHab ignores the decimal place most of the time. It just shows 236.0V. Somethings for a fraction of a second a non-zero decimal is shown.

Both is with OpenHAB 2.0.0 and MySensors Binding 2.1.0