In this chapter we learned that GPIO pins are digital pins which provide control to the user to turn it on/off and set input
/output
direction via software. When the pin direction is set to output, one can make it HIGH
/LOW
and the component attached to that pin gets that HIGH
/LOW
signal. GPIO
pins provide plug-in functionality to add external digital components to BeagleBone. We found that BeagleBone provides many GPIO
pins via P8
and P9
headers to which we can connect digital components like LEDs, buzzers, relays, and so on. Then we wrote and tested BoneScript programs to blink and dance external LEDs. Now, we will move to interaction with another electronic component – the push button. In the next chapter, we will be taking input from the push button and respond.
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