I’ve a liking for anolog dials, so I set about looking for something that could display various metrics of fermentation. I had an old kindle laying in a drawer unused and wondered if it was possible to.
There are a few kindle mods to disply weather data on kindles. Basically it involves rooting the kindle (I don’t recommend this on your kindle that you may use daily unless s you’re willing tonrisk bricking it)
After rooting, various utilities are installed, mainly the usb hack. This will enable ssh into your kindle. Here I wrote a sxript to grab the last value off thingspeak.com where my fermentation co2 interval is logged. This is then converted to analogue and displayed on the kindle. Beer meter! 🙂