Your bluetooth is bad (continued)

More example of how to make bad Bluetooth devices

What format is my number?

Bluetooth developers continue to create a bewildering variety of undocumented data formats. Indeed, it's a race between them and the bizarrely incompetent "Distributed Ledger" teams for the worse numerical formats.

• Nordic Thingy -- you can't just describe a value as a "uint_16"! Specifically, you can't do it because I don't know if you mean a big-endian or little-endian value (as it turns out, the Nordic Thingy is little-endian)
• Also Nordic Thingy -- describing a temperature as a signed value and an unsigned fraction only works if you tell me the denominator of the fraction. Some devices might reasonably make the "fraction" part be out-of-10 to get a degrees in a tenth of a degree (which is just fine for a weather station), or it might be out-of-100 or even out-of-256.