This project will help you to get time from Internet for IoT projects, without requiring any extra RTC hardware.
A seven segment LED clock that connects to the internet to automatically set the time and sync on the hour every hour.
How to make IoT based Digital World Clock using ESP8266. For this project, you don’t need RTC Clock Module, Time will be updated from NTP
Using the Beidou satellite navigation network in conjunction with GPS to have more precise NTP server.
Transit NTP acquisition time short-distance transmission within weak distance.
This tutorial explains the main steps to publish ESP32 data to AskSensors IoT platform with timestamp over MQTT.
Highly accurate, Ethernet base, 7-segment clock driver with built-in NTP client.