Characteristic Write Request failed: Request attribute has encountered an unlikely error
@hannseman 
Hope you are doing well.

I noticed today when my Homebridge ist running (only with homebridge-mi-hygrothermograph), that I can't start any other commands using command line with gatttool.

For example I try to controll a [SwitchBot](https://www.switch-bot.com) which workes great when homebridge is not running.

`gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570101`

But at that moment homebridge is running, it is running nothing works with the command anymore.

pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570101
**Characteristic value was written successfully**
pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570102
**Characteristic value was written successfully**
pi@pi-zero:~ $ **sudo systemctl start homebridge**
pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570101
**Characteristic Write Request failed: Request attribute has encountered an unlikely error**
pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570102
**Characteristic Write Request failed: Request attribute has encountered an unlikely error**
pi@pi-zero:~ $ **sudo systemctl stop homebridge**
pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570101
**Characteristic value was written successfully**
pi@pi-zero:~ $ gatttool -t random -b C3:6D:2E:21:5E:4A --char-write-req -a 0x0016 -n 570102
**Characteristic value was written successfully**

```
pi@pi-zero:~ $ gatttool -t random -b C4:6F:2E:20:7E:5A --char-write-req -a 0x0016 -n 570102
connect: Device or resource busy (16)
```
Or HB Log

```
Aug 25 20:39:33 pi-zero homebridge[1234]: [8/25/2019, 8:39:33 PM] Homebridge is running on port 58569.
Aug 25 20:39:33 pi-zero homebridge[1234]: [8/25/2019, 8:39:33 PM] [Raumklima] Start scanning.
Aug 25 20:39:33 pi-zero homebridge[1234]: [8/25/2019, 8:39:33 PM] [Raumklima Esszimmer] Start scanning.
Aug 25 20:39:33 pi-zero homebridge[1234]: [8/25/2019, 8:39:33 PM] [Raumklima Schlafzimmer] Start scanning.
Aug 25 20:39:34 pi-zero homebridge[1234]: noble warning: unknown handle 64 disconnected!
Aug 25 20:40:05 pi-zero homebridge[1234]: [8/25/2019, 8:40:04 PM] [Config] Homebridge Config UI X v4.6.1 is listening on :: port 8080
Aug 25 20:40:57 pi-zero homebridge[1234]: [8/25/2019, 8:40:57 PM] [Raumklima] Stopped scanning.
Aug 25 20:40:57 pi-zero homebridge[1234]: [8/25/2019, 8:40:57 PM] [Raumklima Esszimmer] Stopped scanning.
Aug 25 20:40:57 pi-zero homebridge[1234]: [8/25/2019, 8:40:57 PM] [Raumklima Schlafzimmer] Stopped scanning.
Aug 25 20:41:00 pi-zero homebridge[1234]: [8/25/2019, 8:41:00 PM] [Raumklima] Start scanning.
Aug 25 20:41:00 pi-zero homebridge[1234]: [8/25/2019, 8:41:00 PM] [Raumklima Esszimmer] Start scanning.
Aug 25 20:41:00 pi-zero homebridge[1234]: [8/25/2019, 8:41:00 PM] [Raumklima Schlafzimmer] Start scanning.
```

I already set the `"updateInterval": 300,` in config.json but that didn't make any difference.

Gatttool should be able to handle multiple connections. 
 
Do you have any idea? I very much appreciate your feedback.
Thanks.