Our forthcoming example will require an LED, as well as a series resistor connected to a GPIO pin (GPIO 21, for our example). I'm confident that, given the number of times we've built LED circuits already in this book, you could wire this up on your own with no problems! (And in case you do need a reminder, see Figure 2.7 in Chapter 2, Getting Started with Python and IoT.)
Keep the DHT 11/DHT 22 circuit you created for our first IFTTT Applet example because we will reuse this circuit again later in this chapter.
When you have your circuit ready, we will continue and run our sample program.
