April 2017
Beginner to intermediate
312 pages
7h 23m
English
Content preview from Python Programming with Raspberry Pi
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The applications of conditional statements: executing tasks using GPIO
In the previous chapter, we discussed interfacing outputs to the Raspberry Pi's GPIO. Let's discuss an example where a simple push button is pressed. A button press is detected by reading the GPIO pin state. We are going to make use of conditional statements to execute a task based on the GPIO pin state.
Let us connect a button to the Raspberry Pi's GPIO. All you need to get started are a button, pull-up resistor, and a few jumper wires. The figure given later shows an illustration on connecting the push button to the Raspberry Pi Zero. One of the push button's terminals is connected to the ground pin of the Raspberry Pi Zero's GPIO pin.
The schematic of the button's interface ...
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