The control user interface can be created with the Blynk app builder using four button controllers to move the robot forward, backward, left, and right:
- Open the Blynk app builder and tap New Project:
![](https://static.packt-cdn.com/products/9781788995061/graphics/assets/2e7a468e-49a6-4934-b202-0dd6b336e693.png)
Choosing New Project
- In the Create New Project page, type in the project name, Robot Car. Under CHOOSE DEVICE, select the correct Raspberry Pi model. Then, under CONNECTION TYPE, select WiFi. If you're using a Raspberry Pi model 1 or 2, you should connect an external Wi-Fi dongle to the Raspberry Pi's USB port. The Raspberry Pi model 3 has a built-in Wi-Fi module, so you don't need to connect a Wi-Fi dongle to it. Finally, tap Create to build the project workspace:
![](https://static.packt-cdn.com/products/9781788995061/graphics/assets/ad3658d3-8204-4012-8666-7df7149a3731.png)
Project Settings page
- Tap the OK button:
![](https://static.packt-cdn.com/products/9781788995061/graphics/assets/b74f18dd-4219-48e4-8033-d88ed0e6b813.png)
Auth token sending notification
- In the project workspace, tap the plus icon to open the Widget Box and add four buttons:
![](https://static.packt-cdn.com/products/9781788995061/graphics/assets/d79d374a-0049-4c1b-b2d9-642230499dce.png)
Inserting...