Summary
In Chapter 15 you have learned the basics of reading and writing to an SD Card. There are many more concepts you can learn about using the SD Card with the SDFat library by reading the documentation that comes with it. You have just scratched the surface with the projects in this chapter! Along the way, you have been introduced to the I2C protocol. You have also learned how to connect a DS1307 real time clock chip, which will be very useful for your own clock based projects in future. Another great way of obtaining a very accurate time signal is using a cheap GPS device with a serial output.
Knowing how to read and write to an SD card is a vital piece of knowledge for making data loggers, especially for remote battery operated devices. ...
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