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Add RTC time persistence to flash

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Save last known unix timestamp to /rtc_save on shutdown and restore it
on startup, so the clock shows correct time immediately after restart
without waiting for GPS fix.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-10 18:23:25 +02:00
parent 6cf8544979
commit 0fc12b60fe
5 changed files with 25 additions and 0 deletions
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20
examples/companion_radio/DataStore.cpp
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@@ -288,6 +288,26 @@ void DataStore::savePrefs(const NodePrefs& _prefs, double node_lat, double node_
}
}
void DataStore::saveRTCTime() {
uint32_t t = _clock->getCurrentTime();
if (t < 1000000000UL) return; // don't save if time not yet synced
File file = openWrite(_fs, "/rtc_save");
if (file) {
file.write((uint8_t *)&t, sizeof(t));
file.close();
}
}
void DataStore::restoreRTCTime() {
File file = openRead(_fs, "/rtc_save");
if (file) {
uint32_t t = 0;
file.read((uint8_t *)&t, sizeof(t));
file.close();
if (t > 1000000000UL) _clock->setCurrentTime(t);
}
}
void DataStore::loadContacts(DataStoreHost* host) {
File file = openRead(_getContactsChannelsFS(), "/contacts3");
if (file) {