pcf8563_time_lib.ino

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#include <RtcDrv.hpp>
 
#ifndef SENSOR_SDA
#define SENSOR_SDA  42
#endif
 
#ifndef SENSOR_SCL
#define SENSOR_SCL  41
#endif
 
#ifndef SENSOR_IRQ
#define SENSOR_IRQ  14
#endif
 
SensorPCF8563 rtc;
uint32_t intervalue;
char buf[64];
 
void setup()
{
    Serial.begin(115200);
    while (!Serial);
 
    pinMode(SENSOR_IRQ, INPUT_PULLUP);
 
    if (!rtc.begin(Wire, SENSOR_SDA, SENSOR_SCL)) {
        Serial.println("Failed to find PCF8563 - check your wiring!");
        while (1) {
            delay(1000);
        }
    }
 
    // The simplest way to set up
    rtc.setDateTime(2024, 1, 17, 4, 21, 30);
 
    // Unix tm structure sets the time
    struct tm timeinfo;
    timeinfo.tm_yday = 2025 - 1900; //Counting starts from 1900, so subtract 1900 here
    timeinfo.tm_mon = 1 - 1;        //Months start at 0, so you need to subtract 1.
    timeinfo.tm_mday = 17;
    timeinfo.tm_hour = 4;
    timeinfo.tm_min = 30;
    timeinfo.tm_sec = 30;
    rtc.setDateTime(timeinfo);
}
 
 
void loop()
{
    if (millis() - intervalue > 1000) {
 
        intervalue = millis();
 
        struct tm timeinfo;
        // Get the time C library structure
        rtc.getDateTime(&timeinfo);
 
        // Format the output using the strftime function
        // For more formats, please refer to :
        // https://man7.org/linux/man-pages/man3/strftime.3.html
 
        size_t written = strftime(buf, 64, "%A, %B %d %Y %H:%M:%S", &timeinfo);
 
        if (written != 0) {
            Serial.println(buf);
        }
 
        written = strftime(buf, 64, "%b %d %Y %H:%M:%S", &timeinfo);
        if (written != 0) {
            Serial.println(buf);
        }
 
 
        written = strftime(buf, 64, "%A, %d. %B %Y %I:%M%p", &timeinfo);
        if (written != 0) {
            Serial.println(buf);
        }
    }
}