CC2640R2F: HCI Command to Notify

Bhavin Parmar

Part Number: CC2640R2F

Hi,

I am using host test example to make CC2640R2F as Master( Central ) to make connection with another CC2640R2F as Slave( Peripharal ).

Slave is exposing characteristics with Notify and Master have to Notify it before starting data convey.

My problem is i am not able to send notification here to slave, where i used like..

1.GATT_Notification

2.GATT_Indication

and other few HCI commands but slave is not able to getting notified while doing same with mobile app slave gets notify.

Can you please assist me to exactly what is the command to send notification.

I have used following commands after making connection...

Send_GapInit_connect 0x00, "xx:xx:xx:xx:xx:xx", 0x01, 0
sleep(3000)

Send_GATT_DiscAllPrimaryServices 0
sleep(3000)

Send_GATT_DiscAllCharDescs 0, 0x0001, 0xFFFF
sleep(2000)

#Send_GATT_Notification 0, 0x00, 0x0013, "01"

Regards,

Bhavin

over 5 years ago

0 desouza over 5 years ago

TI__Guru**** 171879 points

Bhavin,

Thank you for your inquiry. I notified one of our team members about this thread and he will provide additional insights as soon as possible.

Regards,

Rafael

0 Bhavin Parmar over 5 years ago in reply to desouza

Expert 1550 points

Hi Rafael,

Is there any update ?

Regards,

Bhavin

0 Alec May over 5 years ago in reply to Bhavin Parmar

TI__Genius 17265 points

Hi Bhavin,

In the steps that you listed, I did not see that you ever enable notifications in CCCD, did you make sure to perform this step before sending notifications?

Best Regards,
Alec

0 Bhavin Parmar over 5 years ago in reply to Alec May

Expert 1550 points

Hi Alec,

You can see last command is to send notification.

Did you mean that before sending notification command, do we need to enable in CCCD ? If yes then can you tell me what is the command and how to do that ?

Please note that I am talking here to send notification from client (central) to server (peripheral).

Regards,

Bhavin

0 Alec May over 5 years ago in reply to Bhavin Parmar

TI__Genius 17265 points

Hi Bhavin,

Sorry for the delay, I wanted to consult a couple of team member's about your issue before I got back to you. In this situation, who is acting as your GATT server, and why do you want the central to notify the peripheral? I am not saying that this isn't something that is possible, but it is something that is very rarely the best methodology. You may also want to review the BLE Core Spec section which discusses notifications, as there are some very good diagrams that will help you understand the flow of messgaes when using notifications. You can find them in the BLE Core Spec Volume 3, part G, chapter 4.10 and 4.11. You can also find some helpful information on our Custom Profile section on SimpleLink Academy, which I've linked below. Let me know what further questions you have once you've reviewed all the information i've sent.

https://dev.ti.com/tirex/explore/content/simplelink_academy_cc2640r2sdk_4_20_03_00/modules/blestack/ble_01_custom_profile/ble_01_custom_profile.html#introduction

Best Regards,
Alec

0 Alec May over 5 years ago in reply to Alec May

TI__Genius 17265 points

Hi Bhavin,

Were you able to resolve your issue?

Best Regards,
Alec

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CC2640R2F: HCI Command to Notify