Here we are at the end of this chapter, where we learnt the basic principle behind a simple electronic circuit using LEDs and switches. We saw what GPIOs are and how we can access them from python and wrote a simple code to make an LED blink at a particular interval. Then we added external libraries to python on BeagleBone boards. In the next chapter, we will be seeing how we can get an input from the external world and build a system that reacts to that input.
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