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111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
#include "real_time_clock.h"
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#include "esphome/core/log.h"
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#ifdef USE_HOST
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#include <sys/time.h>
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#elif defined(USE_ZEPHYR)
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#include <zephyr/posix/time.h>
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#else
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#include "lwip/opt.h"
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#endif
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#ifdef USE_ESP8266
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#include "sys/time.h"
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#endif
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#if defined(USE_RP2040) || defined(USE_ZEPHYR)
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#include <sys/time.h>
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#endif
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#include <cerrno>
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#include <cinttypes>
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#include <cstdlib>
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namespace esphome::time {
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static const char *const TAG = "time";
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RealTimeClock::RealTimeClock() = default;
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ESPTime __attribute__((noinline)) RealTimeClock::now() {
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#ifdef USE_TIME_TIMEZONE
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time_t epoch = this->timestamp_now();
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struct tm local_tm;
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if (epoch_to_local_tm(epoch, get_global_tz(), &local_tm)) {
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return ESPTime::from_c_tm(&local_tm, epoch);
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}
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// Fallback to UTC if parsing failed
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return ESPTime::from_epoch_utc(epoch);
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#else
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return ESPTime::from_epoch_local(this->timestamp_now());
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#endif
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}
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void RealTimeClock::dump_config() {
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#ifdef USE_TIME_TIMEZONE
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const auto &tz = get_global_tz();
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// POSIX offset is positive west, negate for conventional UTC+X display
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int std_h = -tz.std_offset_seconds / 3600;
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int std_m = (std::abs(tz.std_offset_seconds) % 3600) / 60;
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if (tz.has_dst()) {
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int dst_h = -tz.dst_offset_seconds / 3600;
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int dst_m = (std::abs(tz.dst_offset_seconds) % 3600) / 60;
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ESP_LOGCONFIG(TAG, "Timezone: UTC%+d:%02d (DST UTC%+d:%02d)", std_h, std_m, dst_h, dst_m);
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} else {
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ESP_LOGCONFIG(TAG, "Timezone: UTC%+d:%02d", std_h, std_m);
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}
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#endif
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auto time = this->now();
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ESP_LOGCONFIG(TAG, "Current time: %04d-%02d-%02d %02d:%02d:%02d", time.year, time.month, time.day_of_month, time.hour,
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time.minute, time.second);
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}
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void RealTimeClock::synchronize_epoch_(uint32_t epoch) {
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ESP_LOGVV(TAG, "Got epoch %" PRIu32, epoch);
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// Skip if time is already synchronized to avoid unnecessary writes, log spam,
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// and prevent clock jumping backwards due to network latency
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constexpr time_t min_valid_epoch = 1546300800; // January 1, 2019
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time_t current_time = this->timestamp_now();
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// Check if time is valid (year >= 2019) before comparing
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if (current_time >= min_valid_epoch) {
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// Unsigned subtraction handles wraparound correctly, then cast to signed
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int32_t diff = static_cast<int32_t>(epoch - static_cast<uint32_t>(current_time));
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if (diff >= -1 && diff <= 1) {
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// Time is already synchronized, but still call callbacks so components
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// waiting for time sync (e.g., uptime timestamp sensor) can initialize
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this->time_sync_callback_.call();
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return;
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}
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}
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// Update UTC epoch time.
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#ifdef USE_ZEPHYR
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struct timespec ts;
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ts.tv_nsec = 0;
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ts.tv_sec = static_cast<time_t>(epoch);
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int ret = clock_settime(CLOCK_REALTIME, &ts);
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if (ret != 0) {
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ESP_LOGW(TAG, "clock_settime() failed with code %d", ret);
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}
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#else
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struct timeval timev {
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.tv_sec = static_cast<time_t>(epoch), .tv_usec = 0,
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};
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struct timezone tz = {0, 0};
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int ret = settimeofday(&timev, &tz);
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if (ret == EINVAL) {
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// Some ESP8266 frameworks abort when timezone parameter is not NULL
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// while ESP32 expects it not to be NULL
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ret = settimeofday(&timev, nullptr);
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}
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if (ret != 0) {
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ESP_LOGW(TAG, "setimeofday() failed with code %d", ret);
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}
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#endif
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auto time = this->now();
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ESP_LOGD(TAG, "Synchronized time: %04d-%02d-%02d %02d:%02d:%02d", time.year, time.month, time.day_of_month, time.hour,
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time.minute, time.second);
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this->time_sync_callback_.call();
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}
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} // namespace esphome::time
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