I bought the kit from 3D mechatronics and assembled it. All good apart from the very specific orientation instruction for the battery connector that turned out to be wrong (checked colour against pcb marking too late), and ended up with a fried charger board and temp sensor. I also assumed the Wemos would come pre-flashed, as the kit implied it just needed to be soldered together, but it wasn’t, which turned out to be a bit of a challenge with a Mac. Sorted it after a couple of nights of reading through the small number of articles about flashing Wemos via Mac.
Mines in its first brew. I only calibrated it in sugar water. So far the numbers seem sensible, although I didn’t put it in until 24 hours in, so didn’t manage to compare to OG.
Mine did stop communicating with wifi after 4 hours, but a battery charge sorted it. What voltage range do other people go down to?
Also are you guys using ubidots or something else? If I get a second Spindel, even the education version will be a few quid a month.