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vtjnash/MHO-C303.txt

Last active January 18, 2023 05:08
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Updating time on MHO-C303 manually (example)
Raw
MHO-C303.txt
Getting current time:
julia> string(bswap(round(UInt32, datetime2unix(Dates.now()))), base=16) * "00"
"5f3f1f60"
The "00" is the timezone offset (in hours). Here we just use localtime (with offset zero).
With Bluetility.app (from Github) or any other similar tool for bt gatt, look for:
Service: EBE0CCB0-7A0A-4B0C-8A1A-6FF2997DA3A6
Characteristic: EBE0CCB7-7A0A-4B0C-8A1A-6FF2997DA3A6
Read: Hex: 973F1F60_00
Write: Hex: 5f3f1f6000<enter>
Confirming update:
julia> unix2datetime(bswap(0x973F1F60))
2021-02-07T01:17:11
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vtjnash commented Feb 7, 2021

Found these also:
https://github.com/estshorter/MHO-C303-timesync
https://github.com/h4/lywsd02

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vtjnash commented Nov 8, 2022 

julia> using Dates; string(bswap(round(UInt32, 30+datetime2unix(Dates.now()))), base=16) * "00" |> clipboard

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