I ran my HM without pitdroid this weekend and it till timed out. I think it has to do with my RPi.I don't have access to my smoker right now, so I haven't really been using my Heatermeter. That said, I'm not sure how PitDroid could crash the Heatermeter, I'm just using the normal API calls. Maybe there's some kind of bug that's causing it to access it too frequently? I can take a look.
And Ralph, if you want a peak temp higher than 350 just change it in the settings.