check takes 1 minute to reports the status

As I execute `hs100.sh check` it takes 1 minute to reports the status (ON or OFF).
No problems, instead, if I turn on and off the HS100.

Furthermore, `hs100.sh check` also reports:
```
hs100	egrep: warning: egrep is obsolescent; using grep -E
egrep: warning: egrep is obsolescent; using grep -E
```