how to recieve notifications on central device

rangineni balasubramanyam

Hi,

I programmed ble peripheral device to send notifications for every 5 secs by using return GATT_Notification( ); , on the recieving side(BLE central) i did the following modifications in the simpleBLECentralProcessGATTMsg()

if( ( pMsg->method == ATT_HANDLE_VALUE_NOTI) )
{

LCD_WRITE_STRING_VALUE( "NOTI RXC: ", pMsg->msg.handleValueNoti.value[0], 10, HAL_LCD_LINE_1 );
}

still i am not able to recieve and not able to print notifications on LCD, what could be the problem?

am i missing anything?

note: with BTtool it is working perfectly

over 11 years ago

0 J Lindh over 11 years ago

TI__Guru 57865 points

Hi Rangineni,

Can you verify that you are sending the notification over the air, by using a sniffer or something like that?

If it's sent, I suggest you debug and see if simpleBLECentralProcessGATTMsg is ever triggered.

Best Regards

Joakim

0 rangineni balasubramanyam over 11 years ago in reply to J Lindh

Prodigy 110 points

Hi Joakim Lindh,

Thanks for your reply,

I tried with the BTool, it is receiving notifications perfectly at specified intervals.

But when it comes to the board with SimpleCentral example i am not able to get the notification event , I tried debugging with break point at simpleBLECentralProcessGATTMsg(), its triggering but for the events related to read and write not for Notification from the server.

Thanks & Regards,

Rangineni Balasubramanyam

0 Vijayasarathy Shastri over 11 years ago in reply to rangineni balasubramanyam

TI__Intellectual 1840 points

Hi,

In the BLE central project, we have the, simpleBLEFindSvcUuid, function , which filters based on UUID.

Look at this function, disable/modify this as per your need, and you should be able to now get the BLEPeripheral device displayed on the LCD of your BLE Central board.

Regards,

Vijay

0 rangineni balasubramanyam over 11 years ago in reply to Vijayasarathy Shastri

Prodigy 110 points

Hi Vijayasarathy Shastri,

I don't understand why you gave reply like that, please read my question to understand my problem, i am able to connect but i am not able to enable notifications in the peripheral from the central and not able to get the Notification event in the central device

Thanks & Regards,

Rangineni balasubramanyam

0 Shafy Subair over 11 years ago in reply to rangineni balasubramanyam

Prodigy 70 points

Hi Rangineni ,

Were you able to resolve this ? Can you please post how to enable notification from the simpleblecentral profile ?

Thanks

Shafy

0 Maulik K Patel over 11 years ago in reply to Shafy Subair

Intellectual 410 points

Hi Shafy/Rangineni,

It seems like you are not enabling the notifications not required characteristics.

After successful discovery process you need to find out the handle of the Client Characteristic Configuration Descriptor and need to enable notification by writing the appropriate value into this CCCD.

If you are not aware of this then you should look at the TimeApp example. In this example TI has shown how to enable notifications on characteristics.

Regards,

Maulik

0 rangineni balasubramanyam over 11 years ago in reply to Shafy Subair

Prodigy 110 points

Hi shafy subair,

Instead of enabling notifications from central device, i did enable notifications and transmitting packets from the peripheral itself at specified intervals

Regards,

Rangineni Balasubramanyam

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how to recieve notifications on central device