Also das funktioniert schon muss aber angepasst werden, woher das ist stecht unten.
/*********
Rui Santos & Sara Santos - Random Nerd Tutorials
Complete instructions at https://RandomNerdTutorials.com/esp8266-nodemcu-ds3231-real-time-clock-arduino/
*********/
// Example based on the library: implementation of an alarm using DS3231
#include <RTClib.h>
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
// the pin that is connected to SQW
#define CLOCK_INTERRUPT_PIN 14
// LED for visual indication
const int ledPin = 2;
// set the alarms
// (year, month, day, hour, minutes, seconds)
DateTime alarm1Time = DateTime(2025, 01, 03, 18, 42, 0);
DateTime alarm2Time = DateTime(2025, 01, 03, 18, 48, 0);
void printCurrentTime(){
// Get the current time from the RTC
DateTime now = rtc.now();
// Getting each time field in individual variables
// And adding a leading zero when needed;
String yearStr = String(now.year(), DEC);
String monthStr = (now.month() < 10 ? "0" : "") + String(now.month(), DEC);
String dayStr = (now.day() < 10 ? "0" : "") + String(now.day(), DEC);
String hourStr = (now.hour() < 10 ? "0" : "") + String(now.hour(), DEC);
String minuteStr = (now.minute() < 10 ? "0" : "") + String(now.minute(), DEC);
String secondStr = (now.second() < 10 ? "0" : "") + String(now.second(), DEC);
String dayOfWeek = daysOfTheWeek[now.dayOfTheWeek()];
// Complete time string
String formattedTime = dayOfWeek + ", " + yearStr + "-" + monthStr + "-" + dayStr + " " + hourStr + ":" + minuteStr + ":" + secondStr;
// Print the complete formatted time
Serial.println(formattedTime);
}
ICACHE_RAM_ATTR void onAlarm() {
Serial.println("Alarm occured!");
// toggle the current LED state
int state = digitalRead(ledPin);
digitalWrite(ledPin, !state);
}
void setup() {
Serial.begin(115200);
pinMode (ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// initializing the rtc
if(!rtc.begin()) {
Serial.println("Couldn't find RTC!");
Serial.flush();
while (1) delay(10);
}
if(rtc.lostPower()) {
// this will adjust to the date and time at compilation
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
// Uncomment if you need to adjust the time
// rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
//we don't need the 32K Pin, so disable it
rtc.disable32K();
// Trigger an interrupt when the alarm happens
pinMode(CLOCK_INTERRUPT_PIN, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(CLOCK_INTERRUPT_PIN), onAlarm, FALLING);
// set alarm 1, 2 flag to false (so alarm 1, 2 didn't happen so far)
// if not done, this easily leads to problems, as both register aren't reset on reboot/recompile
rtc.clearAlarm(1);
rtc.clearAlarm(2);
// stop oscillating signals at SQW Pin, otherwise setAlarm1 will fail
rtc.writeSqwPinMode(DS3231_OFF);
// turn off alarm 2 (in case it isn't off already)
// again, this isn't done at reboot, so a previously set alarm could easily go overlooked
rtc.disableAlarm(2);
// Schedule Alarm1 to fire when the minutes match
if(!rtc.setAlarm1(alarm1Time, DS3231_A1_Second)) { // this mode triggers the alarm when the minutes match
Serial.println("Error, alarm wasn't set!");
}else {
Serial.println("Alarm 1 will happen at specified time");
}
}
void loop() {
// print current date and time
printCurrentTime();
// Get Details about the alarm1
DateTime alarm1 = rtc.getAlarm1();
Ds3231Alarm1Mode alarm1mode = rtc.getAlarm1Mode();
char alarm1Date[12] = "DD hh:mm:ss";
alarm1.toString(alarm1Date);
Serial.print("[Alarm1: ");
Serial.print(alarm1Date);
Serial.print(", Mode: ");
switch (alarm1mode) {
case DS3231_A1_PerSecond: Serial.print("PerSecond"); break;
case DS3231_A1_Second: Serial.print("Second"); break;
case DS3231_A1_Minute: Serial.print("Minute"); break;
case DS3231_A1_Hour: Serial.print("Hour"); break;
case DS3231_A1_Date: Serial.print("Date"); break;
case DS3231_A1_Day: Serial.print("Day"); break;
}
// the value at SQW-Pin (because of pullup 1 means no alarm)
Serial.print("] SQW: ");
Serial.print(digitalRead(CLOCK_INTERRUPT_PIN));
// whether a alarm fired
Serial.print(" Fired: ");
Serial.print(rtc.alarmFired(1));
// Only one alarm can be set at a time, reset alarm 1 and activate alarm 2
// resetting SQW and alarm 1 flag
// the next alarm could now be configurated
if (rtc.alarmFired(1)) {
rtc.clearAlarm(1);
Serial.println(" - Alarm cleared");
// Set Alarm 2
if(!rtc.setAlarm2(alarm2Time, DS3231_A2_Minute)) { // this mode triggers the alarm when the minutes match
Serial.println("Error, alarm wasn't set!");
}else {
Serial.println("Alarm 2 will happen at specified time");
}
// Get Details about the alarm2
DateTime alarm1 = rtc.getAlarm2();
Ds3231Alarm2Mode alarm2mode = rtc.getAlarm2Mode();
char alarm2Date[12] = "DD hh:mm:ss";
alarm1.toString(alarm2Date);
Serial.print("[Alarm2: ");
Serial.print(alarm2Date);
Serial.print(", Mode: ");
switch (alarm2mode) {
case DS3231_A2_PerMinute: Serial.print("Every Minute"); break;
case DS3231_A2_Minute: Serial.print("Minute"); break;
case DS3231_A2_Hour: Serial.print("Hour"); break;
case DS3231_A2_Date: Serial.print("Date"); break;
case DS3231_A2_Day: Serial.print("Day"); break;
}
// the value at SQW-Pin (because of pullup 1 means no alarm)
Serial.print("] SQW: ");
Serial.print(digitalRead(CLOCK_INTERRUPT_PIN));
// whether a alarm fired
Serial.print(" Fired: ");
Serial.print(rtc.alarmFired(1));
}
Serial.println();
delay(2000);
}
Meine Zeit ist abgelaufen .
Dort sind auch andere Beispiele.
