monitor

Has anyone had any luck with one of these to monitor fermentation temperatures? https://bluemaestro.com/products/tempo-disc-bluetooth-waterproof-temperature-sensor-logger I was intrigued by the Tilt or iSpindel, but then I realized I don't really care that much about SG during fermentation...

I am sure this is nothing new with the folks that frequent here... I have experimented around with Arduino in the past quite a bit. Anyone ever build a fermentation monitor using one (Or Pi)? They have O2 sensors, CO2 sensors, and ethanol sensors. Add that to a graphical display, and you could...

I just did a Google search: That seems to be pretty important to many homebrewers. Nobody agrees what's "right," and about all the Internet can do is help you pass the time in between trips to stare at the airlock. Wouldn't it be great if someone made something to tell you when your airlock...