• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 41 subscribers
  • Views 227 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

WL1807MOD: Where to find details on configuring and using Wake on WLAN usage

Jim Brinkhurst1
Mastermind 43860 points
Part Number: WL1807MOD

Hi experts!

My customer is looking at the WL1807MOD for their system and have the following questions. Can you help with this?

We are looking at using the WL1807MOD for a special application. Specifically, we want to leverage the Wake on WLAN function of the module to wake up some other parts of our system from sleep when they receive a magic packet. The documentation for this mode is relatively sparse, but it looks like the wireless chip will stay connected to the access point and then trigger the IRQ pin when a packet received.

 Questions I have right now:

  • What is the power consumption for this mode? Is this the same as the “connected idle” current of 710 uA in the datasheet?
  • What happens if the AP gets disconnected? Will the module reconnect when the AP is present again?
    • If yes, how does authentication for WPA happen with the rest of the system running Linux in low power mode?
    • If no, is there any way to trigger the wake up function after the AP gets disconnected wirelessly?

Thanks for your help!

Best regards,

Jim B

  • 0
    TI__Mastermind 35795 points

    Hi,

    - Power consumption could be higher than "connected idle" state. SoC is still waking up to receive packets , sending acks (if required) etc. It's just that it's not waking up the host if the packet doesn't match the filter .

    - In case STA loses connection to AP, firmware will most likely send "beacon loss" event to the driver. This would result in waking up of the Host and wpa supplicant would initiate sequence to connect to AP again.

    Thanks

    Saurabh

  • 0 in reply to S
    TI__Mastermind 43860 points

    Hi Saurabh

    Here are some follow-up questions from the customer:

    Some follow-ups in terms of the second question:

    • Is there any mechanism by which we can trigger an interrupt event from the WiFi module after it loses connection to the AP the first time?
    • If the host is unavailable, is there a method by which we can re-connect to the AP without using the WPA supplicant driver?
      • Looking at the WiLink 8 guide I see reference to a “Smart Config” mode that seems applicable

     If no to both of the above, do you have another product that offers the following features?

    • Ability to wake up a host wirelessly
    • Can automatically connect to an AP after initial configuration, even with the host down
    • Supports SDIO interface to a Linux host

    Thanks for your help.

    Regards,

    Jim B

  • 0 in reply to Jim Brinkhurst1
    TI__Mastermind 35795 points

    Hi Jim,

    -  WiLink8 SoC does trigger an interrupt /event  to Host whenever it detects that it has lost connection to AP - example : missing consecutive AP beacons. I don't believe we can configure it as one time event .

    -  WiLink8 cannot connect to AP on it's own. It needs wpa supplicant running on Host processor to initiate/manage connection to AP

    TI also offers SimpleLink Wi-Fi devices with integrated supplicant , but they are more suitable for IoT applications and don't support linux driver or SDIO interface (SimpleLink devices support SPI)

    www.ti.com/.../overview.html

    Thanks

    Saurabh

  • 0 in reply to S
    TI__Mastermind 43860 points

    Hi Saurabh

    Here is a follow up response from the customer when I checked in.

    Yes, you answered all of our questions.

    Unfortunately we have a bit of a unique use case that requires the WPA supplicant to run on the WiFi module and also have it act as a network interface to the host processor, which it doesn’t appear that TI supports so I think we’re going to have to look for a different solution.

    Please let me know if there is anything else we can offer this customer beyond the SimpleLink solutions previously mentioned.

    Best regards,

    Jim B

  • 0 in reply to Jim Brinkhurst1
    TI__Mastermind 35795 points

    Hi Jim,

    SimpleLink and WiLink8 are the only 2 family of WiFi devices offered by TI.

    Thanks

    Saurabh