Updating time on MHO-C303 manually (Xiaomi smart clock temperature and humidity meter))
gist.github.com/vtjnash/bb288ffba2a5386f622c1f22d9bae2a3Getting current time: julia> using Dates; string(bswap(round(UInt32, datetime2unix(Dates.now()))), base=16) * "00"
With Bluetility look for:
Service: EBE0CCB0-7A0A-4B0C-8A1A-6FF2997DA3A6
Characteristic: EBE0CCB7-7A0A-4B0C-8A1A-6FF2997DA3A6
Write: Hex: 5f3f1f6000<enter>
Confirming update: julia> using Dates; unix2datetime(bswap(0x973F1F60))