CC3200 SmartConfig Provisioning

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Overview and application details

Warning Warning: SmartConfig™ cannot provision embedded systems in all circumstances. Therefore, products should not go to production implementing only SmartConfig™. Access Point mode or WPS should be implemented and be used as a backup in case SmartConfig™ fails to provision the system.

What is SmartConfig Provisioning?

A first step in utilizing CC32xx in a Wi-Fi enabled application is to configure CC3200 to a user's Wi-Fi network. This requires information on the AP, or SSID name, and the security passcode when WEP/WPA/WPA2 is enabled. Considering that embedded Wi-Fi applications will generally lack user interfaces such as keypads or touchscreens, this process can be complex without the use of advanced I/O.

To create a great user experience, TI has created SmartConfig technology - a one-step and one-time process to connect a CC32xx-enabled device to the home wireless network. This greatly stands apart from other Wi-Fi suppliers who require multiple steps to configure a device onto the network.

SmartConfig leverages the standard mechanisms present in Wi-Fi to configure a CC32xx's association information on the fly, regardless of whether the user-interface is available. In this process a Wi-Fi enabled device such as a smartphone, tablet or a laptop is used to send the association information to the CC32xx.

Addtionally, It can be used to associate multiple devices to the same AP simultaneously. The Configuration process is secured with AES-128 encryption, and the SSID and KEY length are supported up to 32 bytes.

And furthermore, the device used to configure (smartphone, tablet, or PC) stays connected to the user's home network during the configuration process (as opposed to other methods that require disconnection).

Application details

The application performs the following steps:

  • Initializes the device networking layers.
  • Delete all the profiles to ensure that CC32xx device doesn't connect to any other AP
  • Sets the Connection Policy to Automatic. This ensures that device connects to this AP automatically once Smart configuration is complete
  • Wait for the AP Configuration from TI Smart Config Application
  • Wait for the Connection to the AP

Source Files briefly explained

  • main - Device Initialization, Profile deletion, Connection Policy change, Trigger Smart Configuration, Wait for Device Events
  • gpio_if.c - GPIO interface file to handle all LED blinking task.

Usage

  1. Choose an AP that you want to configure on CC32xx Device
  2. Install TI SmartConfig Application on your Smartphone.
  3. Run the reference application (Flashing the bin/IAR/CCS)
    • Open the Project as mentioned in '<cc3200-sdk>\docs\CC3200-Getting Started Guide.pdf'
    • Build and download the application to the board
  4. The application configures the device in SmartConfig mode. The device waits for a Configuration Using TI SmartConfig Application

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Limitations/Known Issues

None.

Links