Chapter 9. Building a Physical Bitcoin Ticker
We already saw in this book that the ESP8266 Wi-Fi chip can be used in many different situations within the Internet of Things. In this chapter, we are going to use it for a quite exotic IoT project: getting the real-time price of Bitcoin, and displaying this price on a small OLED screen.
We are first going to see what Bitcoin is, and how we can grab the price of Bitcoin from a web service. Then, we'll configure our Bitcoin ticket and display the current price of Bitcoin on an OLED display. Finally, we'll add some LEDs into the project to check visually whether the price is going up or down. Let's start!
What is Bitcoin?
Before we actually start building the project itself, let's first quickly talk about ...
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