The RTC module can provide you a real-time clock. You can make the controller to ask the module: hi,buddy, what time it is.
Any time you want to know what time it is. If I have missed the dating, or if it is the mealtime for my three months child. The RTC module can provide you a real-time clock. You can make the controller to ask the module: hi,buddy, what time it is. At the same time, Donot forget to install a small coin cell which can serve you for more than six mouths.
In order to gain a robust performance, you must put a 3-Volt CR1220 lithium cell in the battery-holder. If you use the primary power only, the module may not work normally, because the crystal may not oscillate.
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