If your data is more sensitive and you don't want to share it across the Wi-Fi network or you don't have Wi-Fi connectivity, a solution is to store your data on an SD card.
Let's see how data can be stored on an SD card.
Necessary hardware that will be used:
Since the microSD card is a shield for the Wemos D1 mini, it is easy to stack them; you just need to solder the pins ...
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