reset device if it hangs

[TuxInvader]

Hi Peter,

Firstly, thanks for your work maintaining this project. I received a Temper1F v1.3 today and was keen to start recording some temps. However I ran into some issues with the current code.

I could only read one set of temps, and then the device would hang. So I tried out a python module called temper-python (https://github.com/padelt/temper-python), and found that to work fine.

I compared the two projects, and found this interesting comment in the python module

        # Magic: Our TEMPerV1.4 likes to be asked twice.  When
        # only asked once, it get's stuck on the next access and
        # requires a reset.

Sure enough if I ask my Temper1f twice, it works just as well as the python code.

So here are two commits which, modify the pcsensor.c to:

1. Perform a usb_reset() when bad() is called.
2. Perform an additional read from the device if we're not running in a loop.

Cheers!

[petervojtek]

hi @TuxInvader , thanks for contribution.