CC2651R3SIPA: BLE -Notification not working

Hello Diego,

Thanks for reaching out.

I think these two examples can help you get a better idea of the implementation required from the central and peripheral side. Central: https://github.com/TexasInstruments-Sandbox/ble_examples/tree/simplelink_cc13xx_26xx_sdk-6.40/examples/rtos/LP_CC2651R3SIPA/ble5apps/simple_serial_socket_client. Peripheral: https://github.com/TexasInstruments-Sandbox/ble_examples/tree/simplelink_cc13xx_26xx_sdk-6.40/examples/rtos/LP_CC2651R3SIPA/ble5apps/simple_serial_socket_server. You can see that  in order for the central to receive incoming data, it has to first enable notifications. To do this, it uses the SimpleStreamClient_enableNotifications() API.

Diego Melo said:

I am writing to the CCCD the value 0x0001 as shown in your literature but I get an error.

What error do you get?

Diego Melo said:

Using BTool, I can see the writing to the CCCD reports SUCCESS but I don't see any data back.

Do you mean the notifications are still not transmitted?

In addition, are your characteristics in the gatt table encrypted or required authentication before modifying them and therefore you need to pair/bond first?

BR,

David.

Hi David - thank you for your prompt response. 

I have now downloaded the suggested code, created a new empty project and imported the files maintaining the same structure. The compiler is reporting an error: 

Invalid argument '--product': No product with name "simplelink_cc13xx_cc26xx_sdk" and version "6.40.00.13" found. 

I am using the latest libraries which are of a later version but even when I try replacing that line of code with the correct version the reported error persists. 

Is there anything else I should be doing? I am reluctant to use older libraries as my existing code has been written using the latest library version. Please advise - thank you. 

Regards,

Diego

Hello Diego,

You could leverage the following the migrations guides to get to the latest SDK version: https://software-dl.ti.com/simplelink/esd/simplelink_cc13xx_cc26xx_sdk/7.40.00.77/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/porting-guides/ble5stack2.02.07-to-ble5stack2.02.08.html and then https://software-dl.ti.com/simplelink/esd/simplelink_cc13xx_cc26xx_sdk/7.40.00.77/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/porting-guides/ble5stack2.02.08-to-ble5stack2.02.09.html.

Let me know how it goes.

BR,

David.

Hi David - thanks for the info.

I have followed all the rules for the Client socket based on a std simpleCentral project. I get a few errors that don't appear to be code related but rather setttings related. please see below

Building file: "../myCentral20.syscfg"
Invoking: SysConfig
"C:/ti/sysconfig_1.18.1/sysconfig_cli.bat" --script "C:/Users/User/workspace_v12/myCentral20/myCentral20.syscfg" -o "syscfg" -s "C:/ti/simplelink_cc13xx_cc26xx_sdk_7_41_00_17/.metadata/product.json" --compiler ticlang
Running script...
subdir_rules.mk:9: recipe for target 'build-1686607199' failed
TypeError: Cannot set properties of undefined (setting '$name')
    at scriptFunc (C:\Users\User\workspace_v12\myCentral20\myCentral20.syscfg:112:32)
    at cb (C:\ti\sysconfig_1.18.1\dist\webpack:\src\pinmux\services\scripting\runScript.ts:112:7)
    at Object.withDeprecatedAccess (C:\ti\sysconfig_1.18.1\dist\webpack:\src\pinmux\services\deprecatedAccessGuard.ts:14:10)
    at Object.runAsUserScript (C:\ti\sysconfig_1.18.1\dist\webpack:\src\pinmux\services\scripting\scriptingGuard.ts:61:3)
    at iteratee (C:\ti\sysconfig_1.18.1\dist\webpack:\src\pinmux\services\scripting\runScript.ts:110:5)
    at baseEach (C:\ti\sysconfig_1.18.1\dist\webpack:\node_modules\lodash\lodash.js:530:11)
    at Function.each (C:\ti\sysconfig_1.18.1\dist\webpack:\node_modules\lodash\lodash.js:9409:52)
    at iteratee (C:\ti\sysconfig_1.18.1\dist\webpack:\src\pinmux\services\scripting\runScript.ts:108:6)
    at baseEach (C:\ti\sysconfig_1.18.1\dist\webpack:\node_modules\lodash\lodash.js:530:11)
    at Function.ua (C:\ti\sysconfig_1.18.1\dist\webpack:\node_modules\lodash\lodash.js:9409:52)
gmake: *** [build-1686607199] Error 1

When I double click on the error, it takes me to the subdir_rules.mk file which shows the below:

The error seems to point to the .syscfg file but I don't know exactly what the errors mean.

Thanks in advance for your help.

Regards,

Diego

Hello Diego,

Yes, they seems to be compatibility issues related to SysConfig. Could you please describe what steps have you followed to port the examples to the SDK? It is not clear to me if you have done the porting already. In addition, please share your project properties.

BR,

David.

Hi David,

My problem has moved on somewhat, I found some additional errors related to missing header files, which were not in the link provided. I managed to find these missing files somewhere else within GitHub.

I now get issues related to functions called in the original code using sdk 6.40 that are no longer available in sdk 7_41 please see the figure below. Also, callback templates like gapCentralRoleCB_t are no longer used and references to 'PinTable' how should these be dealt with? Is there a guide on how to migrate projects from one SDK to another? thank you.

the figure below shows on the left simple_serial_socket_client.c and on the right simple_central.c

Thanks in advance for your help.

Regards,

Diego

Hello Diego,

Have you followed the migrations guides?

- https://software-dl.ti.com/simplelink/esd/simplelink_cc13xx_cc26xx_sdk/7.40.00.77/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/porting-guides/ble5stack2.02.07-to-ble5stack2.02.08.html

- https://software-dl.ti.com/simplelink/esd/simplelink_cc13xx_cc26xx_sdk/7.40.00.77/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/porting-guides/ble5stack2.02.08-to-ble5stack2.02.09.html.

BR,

David.

Hi David - yes I have, you sent me these links in your first response but unfortunately this only covers some general items. There are specific functions that are no longer used or have changed significantly like the examples I gave earlier and other items like UART was used and UART2 is used now, one in blocking mode the other one in callback mode, where can I find additional guidance to cover this?

Thanks & regards,

Diego

Hello Diego,

I see, thanks for confirming. We do not have such a guide, I would suggest to take a look at the section: " A Few Noteworthy Changes from BLE5-Stack ..." (which points to TI-RTOS to TI-RTOS7 Migration, GPIO++ Driver Porting Guide, UART to UART2 Porting Guide). However, considering that your interest was more on understanding the mechanism behind notifications I would suggest to inspect how this is implemented in the examples (both from peripheral and central) and then port the functions that you need for your implementation to an example such as simple_peripheral or simple_central in the latest SDK to avoid porting everything and save time.

BR,

David.

Hi David, thanks for getting back to me. I am still struggling to get this issue resolved. I will take a look at the additional links thanks.

It is possible that the characteristics are encrypted, are they dealt with differently? I am using the standard simple central code and I do get as far as the Service Discovered, section, but remain unable to send notifications or receive any data back from the Simple peripheral.

Thanks in advance.

Regards,

Diego

Hello Diego,

You mentioned you got an error when trying to write to the CCCD: "I am writing to the CCCD the value 0x0001 as shown in your literature but I get an error.", could you please share what error is this? If the characteristics are encrypted then you will have to pair/bond first to be able to write to them. From Btool you can use the "Pairing Bonding" window:

BR,

David.