Wemos D1 Mini Data Logger + RTC DS1307

 

Wemos D1 Mini Data Logger + RTC DS1307.With this card data logging shield you can save data to any FAT16 or FAT32 formatted sd It can save data to cards. With the built-in RTC module, it can save data in real time and ensures that data is saved even when the power is disconnected. RTC has protection against incorrect connection of the battery.