//Getting ESP8266 Time from Internet
#include "NTPClient.h"
#include "ESP8266WiFi.h"
#include "WiFiUdp.h"
const char *ssid = "my wifi name";
const char *password = "my wifi password";
const long utcOffsetInSeconds = -18000;
//char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);
void setup(){
Serial.begin(115200);
WiFi.begin(ssid, password);
while ( WiFi.status() != WL_CONNECTED ) {
delay ( 500 );
Serial.print ( "." );
}
timeClient.begin();
}
void loop() {
timeClient.update();
//Serial.print(daysOfTheWeek[timeClient.getDay()]);
Serial.print(", ");
//Serial.print(timeClient.getHours());
Serial.print(":");
Serial.print(timeClient.getMinutes());
Serial.print(":");
Serial.println(timeClient.getSeconds());
//Serial.println(timeClient.getFormattedTime());
delay(1000);
}
Now the part that confuses me, every project I find that uses wifi time to run a sketch function uses a very complex and lengthly process starting with micro-seconds.
Is there not a simple way to just read the minutes and seconds from the wifi to trigger a sketch function at 0 minutes-0 seconds, 15 minutes-0 seconds, 30 minutes-0 seconds, 45 minutes-0 seconds and start again at 0-minutes, 0-seconds?
The minute-seconds combinations appear once every hour in the serial screen, why can I not just pick this time combination and have it trigger an action? My application does not require milli-second accuracy.
I am sure I am over simplifying this but could someone please help me understand.
Thank you