<ul><li>In the automation control system of industry and agriculture, real-time clock (RTC) is a very important function.</li><li>ESP8266 does not have an RTC module, but it can be calibrated through the software via the Internet.</li><li>The ESP8266 provides functions to convert timestamps and calendars, allowing for easy time management.</li><li>An alternative solution for controllers without network connectivity is to save timestamps in FLASH memory.</li></ul>

RTC design with automatic cloud calibration for simple programmable controller based on ESP8266

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