recieved mine this week (in Belgium). Arrived with a dead battery. Bought 2 new batteries and poped a new one in yesterday. Today when I was testing my integration with Brewpi, the LED was already flashing red! (measured 2,74v with a voltmeter).
There might be something wrong with my unit
I emailed the guys from Tilt and I'm waiting a respons now..
On a positive note: It works perfectly well integrated in brewpi with a RP3 (build in bleutooth). RP3 is outside of the fridge and the tilt is floating in a SSbrewtech stainless steel CCT. That was what I was afraid of! But it picks up the signal anyway!
Now lets hope for a good outcome on the battery issue :-/ It seems I won't be using it for my next brew on tuesday
EDIT: Read some other comments in this thread about battery issues.. However, I think I already have the "new model" that flashes purple when the battery has been changed and red or green after getting it out of sleep mode.