Core2 RTC

#if defined(ARDUINO) #define WIFI_SSID "YOUR WIFI SSID NAME" #define WIFI_PASSWORD "YOUR WIFI PASSWORD" #define NTP_TIMEZONE "UTC-8" #define NTP_SERVER1 "0.pool.ntp.org" #define NTP_SERVER2 "1.pool.ntp.org" #define NTP_SERVER3 "2.pool.ntp.org" #include <WiFi.h> // Different versions of the framework have different SNTP header file names and availability. #if __has_include(<esp_sntp.h>) #include <esp_sntp.h> #define SNTP_ENABLED 1 #elif __has_include(<sntp.h>) #include <sntp.h> #define SNTP_ENABLED 1 #endif #endif #ifndef SNTP_ENABLED #define SNTP_ENABLED 0 #endif #include <M5Unified.h> void setup(void) { M5.begin(); Serial.begin(115200); M5.Display.setRotation(1); M5.Display.setTextFont(&fonts::FreeMonoBold9pt7b); if (!M5.Rtc.isEnabled()) { Serial.println("RTC not found."); M5.Display.println("RTC not found."); for (;;) { vTaskDelay(500); } } Serial.println("RTC found."); M5.Display.println("RTC found.\n"); // It is recommended to set UTC for the RTC and ESP32 internal clocks. // setup RTC ( direct setting ) //// YYYY MM DD hh mm ss // M5.Rtc.setDateTime( { { 2021, 12, 31 }, { 12, 34, 56 } } ); // setup RTC ( NTP auto setting ) M5.Display.print("WiFi:"); WiFi.begin(WIFI_SSID, WIFI_PASSWORD); while (WiFi.status() != WL_CONNECTED) { Serial.print('.'); delay(500); } Serial.println("\r\n WiFi Connected."); M5.Display.print("Connected."); configTzTime(NTP_TIMEZONE, NTP_SERVER1, NTP_SERVER2, NTP_SERVER3); #if SNTP_ENABLED while (sntp_get_sync_status() != SNTP_SYNC_STATUS_COMPLETED) { Serial.print('.'); delay(1000); } #else delay(1600); struct tm timeInfo; while (!getLocalTime(&timeInfo, 1000)) { Serial.print('.'); }; #endif Serial.println("\r\n NTP Connected."); time_t t = time(nullptr) + 1; // Advance one second. while (t > time(nullptr)); // Synchronization in seconds M5.Rtc.setDateTime(gmtime(&t)); M5.Display.clear(); } void loop(void) { static constexpr const char* const wd[7] = { "Sun", "Mon", "Tue", "Wed", "Thr", "Fri", "Sat" }; delay(500); //RTC chip auto dt = M5.Rtc.getDateTime(); Serial.printf("RTC UTC :%04d/%02d/%02d (%s) %02d:%02d:%02d\r\n", dt.date.year, dt.date.month, dt.date.date, wd[dt.date.weekDay], dt.time.hours, dt.time.minutes, dt.time.seconds); M5.Display.setCursor(0, 0); M5.Display.printf("RTC UTC :%04d/%02d/%02d (%s) %02d:%02d:%02d", dt.date.year, dt.date.month, dt.date.date, wd[dt.date.weekDay], dt.time.hours, dt.time.minutes, dt.time.seconds); /// ESP32 internal timer auto t = time(nullptr); { auto tm = gmtime(&t); // for UTC. Serial.printf("ESP32 UTC :%04d/%02d/%02d (%s) %02d:%02d:%02d\r\n", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, wd[tm->tm_wday], tm->tm_hour, tm->tm_min, tm->tm_sec); M5.Display.setCursor(0, 40); M5.Display.printf("ESP32 UTC :%04d/%02d/%02d (%s) %02d:%02d:%02d", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, wd[tm->tm_wday], tm->tm_hour, tm->tm_min, tm->tm_sec); } { auto tm = localtime(&t); // for local timezone. Serial.printf("ESP32 %s:%04d/%02d/%02d (%s) %02d:%02d:%02d\r\n", NTP_TIMEZONE, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, wd[tm->tm_wday], tm->tm_hour, tm->tm_min, tm->tm_sec); M5.Display.setCursor(0, 80); M5.Display.printf("ESP32 %s:%04d/%02d/%02d (%s) %02d:%02d:%02d", NTP_TIMEZONE, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, wd[tm->tm_wday], tm->tm_hour, tm->tm_min, tm->tm_sec); } }