switch-multi
I have the following issue, 
on a switch-multi the homekit app does not update the state to 0 and I have to turn it off manually, so the last line comes up.

```
Aug 05 18:28:03 rpi3 homebridge[771]: [8/5/2017, 6:28:03 PM] [Broadlink RM Mini3] Volume Up setSwitchState: 1
Aug 05 18:28:03 rpi3 homebridge[771]: [8/5/2017, 6:28:03 PM] [Broadlink RM Mini3] Volume Up sendHex (192.168.178.36; 0d:43:b4:f9:1a:5d)
Aug 05 18:28:03 rpi3 homebridge[771]: [8/5/2017, 6:28:03 PM] [Broadlink RM Mini3] Volume Up setSwitchState: 0
Aug 05 18:28:05 rpi3 homebridge[771]: [8/5/2017, 6:28:05 PM] [Broadlink RM Mini3] Volume Up setSwitchState: 0
Aug 05 18:28:05 rpi3 homebridge[771]: [8/5/2017, 6:28:05 PM] [Broadlink RM Mini3] Volume Up setSwitchState: already 0
```