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[api] Fix clock conflicts when multiple clients connected to homeassistant time (#13253)

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This commit is contained in:
J. Nick Koston
2026-01-15 16:49:01 -10:00
committed by GitHub
parent d2528af649
commit 4eda9e965f
2 changed files with 15 additions and 1 deletions
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esphome/components/time/real_time_clock.cpp
+12
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@@ -31,6 +31,18 @@ void RealTimeClock::dump_config() {
void RealTimeClock::synchronize_epoch_(uint32_t epoch) {
ESP_LOGVV(TAG, "Got epoch %" PRIu32, epoch);
// Skip if time is already synchronized to avoid unnecessary writes, log spam,
// and prevent clock jumping backwards due to network latency
constexpr time_t min_valid_epoch = 1546300800; // January 1, 2019
time_t current_time = this->timestamp_now();
// Check if time is valid (year >= 2019) before comparing
if (current_time >= min_valid_epoch) {
// Unsigned subtraction handles wraparound correctly, then cast to signed
int32_t diff = static_cast<int32_t>(epoch - static_cast<uint32_t>(current_time));
if (diff >= -1 && diff <= 1) {
return;
}
}
// Update UTC epoch time.
#ifdef USE_ZEPHYR
struct timespec ts;