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CC3235SF: Web Page Utilization

Wireless Engineer
Intellectual 400 points
Part Number: CC3235SF
Other Parts Discussed in Thread: CC3200, CC3235S,

This is a design question really. We currently use the CC3200 but are looking at the CC3235x series to build some IOT connectivity into a field device.
The idea is to be able to configure a device through a UART and will require a number of web pages.
So I guess the question is what would be the best way to store a number of web pages on board and is this even feasible?
Is there any merit to hosting the web pages on a secure cloud server if local storage is not a viable path and would this be a security nightmare ?
Any insights would be most appreciated.

  • 0
    TI__Guru 63006 points

    Hi,

    I'm not sure what exactly are you planning to do with the WiFi. Do you want to use it as a HTTP server?

    The CC3235S and CC3235SF are secure device that include secure storage (file system). 

    You can store the web pages securely on the file system.

    The CC3235 family of device requires an external flash (same as CC3200), but the files can be kept encrypted and signed.

    The HTTP connection itself can be secured as well (over TLS/SSL).

    Br,

    Kobi

  • 0 in reply to Kobi Leibovitch
    Intellectual 400 points

    Thanks Kobi. I think yes, we would like to use it as an HTTP server.
    What would be the max flash storage size that we could connect ?
    Is it as simple as connecting up the lines and then the flash becomes available or would we need to write any interface drivers I wonder ?

  • 0 in reply to Wireless Engineer
    TI__Guru 63006 points

    The supported external flash sizes ranges from 2MB (minimum for CC3235S) to 32MB (256Mbits).

    This will include the image and system files.

    The file system is limited to 256 files.

    The datasheet includes more details. 

    The CC3235 connects to the flash through SPI, no need for extra drivers.

    If you have an experience with CC3200 then this will be the same. 

    The software API introduces couple of new parameters to support the security (e.g. getting file signature and certificate).

     

    Br,

    Kobi