Open-source replacement firmware and reverse-engineering documentation for the Chouchin CH899 Wi-Fi clock movement, featuring local web setup, NTP time synchronisation, POSIX time zones, and ESP8285/MM32 UART integration.
open-source iot arduino esp8266 embedded firmware reverse-engineering ntp uart hardware-hacking time-synchronization esp8285 daylight-saving mm32 gpl-3 wifi-clock ch899 chouchin clock-movement posix-timezone
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Updated
Sep 13, 2026 - C++