Schematic

Source Code

The core code for this project is written in Lua scripting languages, while the web interface is written in html and javascript. All the files are packed into a single zip file which is available here.

Lua is an interpreted language, a change in a script will not necessarily require a rebuild of the entire project, its code is executes immediately after you have saved it, and therefore it is easier to update and maintain. Please read the following Lua files for those interested in seeing how it works.

• /usr/lib/lua/gpio.lua
  GPIO's read/write function for router, more information is available here.
• /usr/lib/lua/2w_motor.lua
  Work with gpio.lua in order to control 2 DC motors, more information is available here.
• /www/cgi-bin/control
  A program that acts as an interface between browser (web page) and router.

As mentioned above, the web interface is written in html and javascript. Please study the following files for those who wants to develop their own interface (GUI).

• /www/car/index.html
  The main program, load the external js & css files and implement image onClick events.
• /www/car/pantilt.html
  The main program, bigger video size.
• /www/car/car.css
  Layout options such as image postion, colors, and fonts.
• /www/car/car.js
  Consists of javascript function.
• /www/images
  A folder consists of the images which shows on the web page.
• /www/codebase
  Consists of javascript components to create slider (dhtmlxSlider), more information is available here.

Software Installation

The software do not need installation, make sure you have transfer them to the correct folders on router. I'm using WinSCP to manage files and folders.

WinSCP is a SFTP/FTP/WebDAV/SCP client for Microsoft Windows that allow you to transfer files and manage folders between computer and router.

Assumes you already have WinSCP running on your computer and are connected to the router. Now extract the downloaded file (2W_WiFi_car.zip) to your computer and transfer them to the respective folders on router as shown in figure below.

Controlling the car

You can control the car from a web browser (do not use Internet Explorer, recommended Google Chrome) or Android application.

• Open up a browser and navigate to http://routerIP/car/ (eg. http://192.168.8.1/car/) or http://routerIP/car/pantilt.html

• Click on the images or use a keyboard to control the car
• Keep pressing a key on the keyboard will keep the car running, release the key will stop the car.

Keyboard shortcut

More photos

More photos are availabled on Flickr

https://www.flickr.com/photos/ediy2u/albums/72157660823719741