connection policy and sl_wlanconnect() in cc3200,

amanaganti vinod kumar1

Other Parts Discussed in Thread: CC3200

Hi,

sl_Wlanconnect()

I am using ti-rtos where multiple threads are running in that two threads are running tcp and udp transfers by opening related sockets.

I am not able connect to new AP, if don't stop these tasks and close the opened sockets I mean if some operations are going on opened sockets then sl_wlanconnect() is hanging. Is it implicit behavior.

connection policy

I am setting connection policy as Auto+fast+smart-config. It is able to perform auto connection,but fast connection seems to be not working, I have observed this with following method.

Connect to AP, after sometime turn-off the AP, now turn it on. cc3200 is printing disconnected event when AP is turned off.

But not able connect to the same AP, though its turned ON after sometime. I waited for nearly 10minutes. Could you guys help on this, As I know fast connection will try to reconnect to the last connected AP, but I am not sure how frequently it will scan the APs and try to reconnect.

Do we have to set any time interval for auto / fast / smart-config option, where it will keep on trying for connection.

I found one more issue is sl_Send() call is blocking if you try to send more than 1516 buffer length.

over 10 years ago

0 Siddaram Mathapathi over 10 years ago

TI__Expert 5660 points

Hi Vinod,

We will try to recreate this at our end and get back to you.

Thanks and Regards,
Siddaram

0 Siddaram Mathapathi over 10 years ago in reply to Siddaram Mathapathi

TI__Expert 5660 points

Hi Vinod,

Please find below responses to your queries
1. connection policy : Please note that if you are not working with profiles this is the expected behaviour. The auto and fast connect was intended especially for profiles but we enabled that for connect command as well. For the connect command it will work only if the AP is left on and the device is restarted. It will not work if AP is turned OFF in between.

2.sl_send : Note that for parameter Len the Range is : 1-1460 bytes.

3. sl_Wlanconnect : I am not very sure if what you are doing is correct. I need to cross check this and get back to you.

Thanks and Regards,
Siddaram

0 amanaganti vinod kumar1 over 10 years ago in reply to Siddaram Mathapathi

Intellectual 650 points

Hi Siddaram,

Thanks for your reply, I am using stored profiles for above connection policies, and sl_Send() is able to transfer 1500 with out failure. Could you please cross check once again.

0 amanaganti vinod kumar1 over 10 years ago in reply to amanaganti vinod kumar1

Intellectual 650 points

Hi Siddaram,

Did you check it, if had done the testing could you please provide your inputs for my further progress on connection policy.

0 Siddaram Mathapathi over 10 years ago in reply to amanaganti vinod kumar1

TI__Expert 5660 points

Hi Vinod,

A colleague of mine will try to look into this and respond.

Thanks and Regards,
Siddaram

0 Alon Srednizki over 10 years ago in reply to Siddaram Mathapathi

TI__Mastermind 18455 points

Hi Vinod,

You should not set SmartConfig policy connection policy as your default setting.
It is only meant to be used for first time provisioning of the system.
Once you are already connected, you should only use auto+fast connection policy.

Thanks,
Alon

0 amanaganti vinod kumar1 over 10 years ago in reply to Alon Srednizki

Intellectual 650 points

Hi Alon,

Thanks for your reply.

I am using connection policy as auto+fast and storing profiles, which is needed for auto reconnection.

If I restart the c3200 device it is able to connect to AP automatically, but if I restart the AP instead of cc3200, it is not able to connect to AP (I waited for 15mins).

Do we have to configure any other settings?

0 Alon Srednizki over 10 years ago in reply to amanaganti vinod kumar1

TI__Mastermind 18455 points

Hi Vinod,

No, no other settings are required.
Are you able to provide wireless sniffer captures of the connection attempts?

Thanks,
Alon

0 Alon Srednizki over 10 years ago in reply to Alon Srednizki

TI__Mastermind 18455 points

Hi Vinod,

I am closing the thread, if issue still exist please open a new thread and add a link to this one for reference.

Thanks,
Alon

0 thanga raj over 10 years ago in reply to Alon Srednizki

Genius 3690 points

Hi Alon,

Need clarification on below things.

1) Scan policy

2) Connection Policy

Scan is performed as follows

1) Disable Connection policy

2) Set scan policy with 10 sec as scan interval, and give a delay of few milli seconds ( MAP_UtilsDelay(8000000) ) and get the network list,

3) Now disable scan policy and set connection policy. these are done inside WlanScan() funtion.

Problems.

1) Sometimes we are getting network list (APs) as zeero, though there are multiple APs.

2) sl_WlanConnect is failing to connect to AP, if don't give proper delay, after immediate WlanScan().

3) If we give wrong password of any AP from scan list, after this device is not connecting to any other AP, though proper credentials are given in sl_wlanscan() call. Here also delay is playing role ( but we couldn't figure out exact delay for this special case)

Could you give suggestion on

1) How much delay is needed between scanning and sl_wlanconnect, which will always connect to AP, if credentials are proper for sl_wlanconnect() call.

Thanks a lot,

Thanga Raj

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connection policy and sl_wlanconnect() in cc3200,