I'm using Adafruit pcf8523 RTC to determine morning and afternoon using code below. It will pull arduino pin 10 high in the morning, and pull it low in the afternoon. Even though it's a straight forward and simple logic, the arduino seems to be not liking its pin 10 stay up high. RTC's output stuck and stop updating the time for some reasons that I cannot figure out. Could anyone please give me some advise on it?
#include "RTClib.h"
RTC_PCF8523 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
int morning = 10; //Assign the output pin to pin 10
//int state = 0;
void setup() {
// put your setup code here, to run once:
Serial.begin(57600);
pinMode(morning, OUTPUT);
#ifndef ESP8266
while (!Serial); // wait for serial port to connect. Needed for native USB
#endif
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
Serial.flush();
while (1) delay(10);
}
if (! rtc.initialized() || rtc.lostPower()) {
Serial.println("RTC is NOT initialized, let's set the time!");
// When time needs to be set on a new device, or after a power loss, the
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
//
// Note: allow 2 seconds after inserting battery or applying external power
// without battery before calling adjust(). This gives the PCF8523's
// crystal oscillator time to stabilize. If you call adjust() very quickly
// after the RTC is powered, lostPower() may still return true.
}
// When time needs to be re-set on a previously configured device, the
// following line sets the RTC to the date & time this sketch was compiled
//rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
// When the RTC was stopped and stays connected to the battery, it has
// to be restarted by clearing the STOP bit. Let's do this to ensure
// the RTC is running.
rtc.start();
// The PCF8523 can be calibrated for:
// - Aging adjustment
// - Temperature compensation
// - Accuracy tuning
// The offset mode to use, once every two hours or once every minute.
// The offset Offset value from -64 to +63. See the Application Note for calculation of offset values.
// https://www.nxp.com/docs/en/application-note/AN11247.pdf
// The deviation in parts per million can be calculated over a period of observation. Both the drift (which can be negative)
// and the observation period must be in seconds. For accuracy the variation should be observed over about 1 week.
// Note: any previous calibration should cancelled prior to any new observation period.
// Example - RTC gaining 43 seconds in 1 week
float drift = 43; // seconds plus or minus over oservation period - set to 0 to cancel previous calibration.
float period_sec = (7 * 86400); // total obsevation period in seconds (86400 = seconds in 1 day: 7 days = (7 * 86400) seconds )
float deviation_ppm = (drift / period_sec * 1000000); // deviation in parts per million (μs)
float drift_unit = 4.34; // use with offset mode PCF8523_TwoHours
// float drift_unit = 4.069; //For corrections every min the drift_unit is 4.069 ppm (use with offset mode PCF8523_OneMinute)
int offset = round(deviation_ppm / drift_unit);
// rtc.calibrate(PCF8523_TwoHours, offset); // Un-comment to perform calibration once drift (seconds) and observation period (seconds) are correct
// rtc.calibrate(PCF8523_TwoHours, 0); // Un-comment to cancel previous calibration
Serial.print("Offset is "); Serial.println(offset); // Print to control offset
}
void loop() {
DateTime now = rtc.now();
if(now.hour()<13){ //Time before 1PM consider as 'Morning', otherwise, 'Afternoon'
digitalWrite(morning,HIGH);
Serial.println("Morning");
delay(5);
}
else{
Serial.println("Afternoon");
digitalWrite(morning,LOW);
delay(5);
}
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(" (");
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
Serial.print(") ");
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
}
// switch (state) {
// case 0:
// Serial.println("Error");
// break;
// case 1:
// RTC_Code_Morning();
// Serial.println("Morning");
// break;
// case 2:
// RTC_Code_Afternoon();
//Serial.println("Afternoon");
// break;
// default:
// Serial.println("Error");
// break;
// }
//delay(1000);
//}
//void RTC_Code_Morning(){
// digitalWrite(morning,HIGH);
// delay(5);
//}
//
//void RTC_Code_Afternoon(){
// digitalWrite(morning,LOW);
//
// delay(5);
//}
