WiFi Time Sync

WiFi Time Sync

🐱 Custom — built for this fork (not in the original firmware).

Sets the clock correctly over WiFi with no manual timezone.

Use it

Settings ▸ Time ▸ Sync over WiFi. (Connect to WiFi once in Settings ▸ WiFi first — the sync reuses the saved credentials.)

How it works

1. Reconnects to the saved WiFi.
2. Gets precise UTC from NTP (pool.ntp.org + Google/Cloudflare fallbacks), then stops the SNTP updater so it can't later overwrite local time.
3. Gets this connection's timezone offset from IP-geolocation (ip-api.com, plain HTTP — no TLS needed).
4. Sets both the ESP32 system clock and the PCF8563 RTC to local time.

The system clock is also restored from the RTC at boot, so the time is correct offline after a reboot (this was missing in stock — the clock read wrong until set).

Caveats

• Behind a VPN/proxy you get the exit node's timezone, not yours.
• The API call reveals your IP to a third party (inherent to IP-geolocation).
• DST: the current offset is applied; re-sync after a DST change (or on next WiFi connect) keeps it right.