Build Instructions

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• 1

  Step 1

  Wireless Router

  I chose the GL.iNet 6416A for this project because it is an extremely small wireless router (dimension: 58*58*22mm), the 5 GPIOs & serial port are all easily accessible via though holes or headers.
  

  All other wireless routers supporting OpenWrt should work fine provided there is enough space in flash, you can find a list of supported router models on OpenWrt's website.
  

  Most of the wireless router may not have enough GPIO to control the motors, however, you can use other pin on the router such as the LED pin, this require to unload the leds_gpio module or this way to control LED manually.

• 2

  Step 2

  Webcam

  I do already have a Microsoft HD-5000 webcam, it’s capable of capturing video up to 1280x720 pixels. The auto-focus was really getting annoying and I do not want autofocus in a car, so I must disable this feature.
  

  Those USB webcams that are UVC compliant should work for this project.
  

• 3

  Step 3

  Motor Controller Board

  A motor may require significantly more current than the wireless router can provide, it may damage your router if you control the motor without a H-bridge. Hence the L298N Motor Driver Controller Board Module is used in this project in order to control the direction & speed of two DC motors.

  I found out that there is about 1.5V voltage drop between the input voltage and the L298’s motor outputs.

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