Not related to Japanese, but to large numbers in general: I just learned that there are to scales for billions - https://en.wikipedia.org/wiki/Long_and_short_scales
25 karma · joined May 4, 2012
This is a nice post about their protocol, although it seems that they are trying to prevent reverse engineering by obfuscating it in newer releases. There are also links to some useful libraries. Remember that MiBand can be connected to just one device at a time.