Writing the Arduino UNO sketch

First, generate the Arduino UNO sketch that shows how to read values from virtual pins with the Adafruit HUZZAH and ESP8266 Wi-Fi by using the Blynk Sketch Builder (https://examples.blynk.cc). The following instructions will show you how to generate the example sketch with the Blynk Sketch Builder (Figure 4.9):

1. Select Adafruit Huzzah from the Board drop down list.
2. Select ESP8266 WiFi from the Connection drop down list.
3. Type the Auth Token associated with your Blynk app in the Auth Token(optional) text box.

4. Select Virtual Pin Read from the Example drop down list:

Figure 4.9: Configuration steps to generate the sketch for a Virtual Pin Read

5. Click the Copy example button in the Blynk Sketch Builder to copy the code onto the clipboard.
6. Then, start the Arduino UNO IDE, create a new file, delete the default sketch, and paste the example code.

The example code generated with the Blynk Sketch Builder can be modified to control the two motors with the Joystick widget through...