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Hardware- ESP8266 Based NodeMCU

I am using NTP Client for time in my alarm project.

I am facing an issue where NTP client is not returning proper values, in the sense that it works properly for the first few hours- returning the time every second, however after some time the values go haywire.

First few hours:-

21:00:45
21:00:46
21:00:47
21:00:48

After sometime:-

06:00:02
06:00:45
06:00:49

What could be the cause of this and how do prevent it?

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    don't use NTP library on esp. esp has 'built-in' ntp functions. see the esp8266/NTP-TZ-DST.ino in IDE examples menu Commented May 8, 2021 at 6:14
  • returning the time every second ... maybe the NTP server starts to ignore your request Commented May 8, 2021 at 16:31
  • @jsotala I'm only using timeClient.getFormattedTime and timeClient.update() , in my loop, I have found out that timeClient.update() does not return anything until the update interval is over, which in my case is about 10 mins Commented May 10, 2021 at 1:34

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