Raspberry PI
Doesn't matter which revision, or version. For amoment I'm planning to use one of the outdated 'B''s I have. one requirement is a USB for WiFi dongle
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DS3231
Clock and Timer ICs / Real-Time Clocks
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WiFi dongle
Any USB wifi dongle, which is supported by raspbi and can operate eith in AP mode, or just connect to the home network.