CC2340R5: Connection issue between host test(ble stack) and basic ble application (ble 5 stack)

Terrence Goh

Prodigy 110 points

Part Number: CC2340R5
Other Parts Discussed in Thread: LAUNCHXL-CC2640R2, , BLE-STACK, CC2640

Tool/software:

Hi TI Team,

I am facing a connection issue using this setup:

board A: LAUNCHXL-CC2640R2 - from blestack folder, build host test application using sdk_5_30_01_11

board B: LP-EM-CC2340R5 - from ble5stack folder, basic ble Peripheral-role application using f3_sdk_8_10_01_02

The bad result from BTool is attached as BTool_NOK.jpg shown below.

It seems board A cannot retrieve the connection settings from board B and return "UNKNOWN_CONN_ID". However, board B connects successfully with TI SimpleLink mobile app.

One last thing, I have another CC2640R2 board as a Peripheral application built from an older ble_sdk_2_02_07_06. This connects successfully with board A using host test. Refer to BTool_OK.jpg.

What did I miss ? Does both board A and board B built from different stack versions are not compatible?

7 months ago

0 Marie H 7 months ago

TI__Guru* 82341 points

Hi Terrence,

From the log, it looks like BTool is not properly set up as a BLE central device.

https://software-dl.ti.com/lprf/simplelink_cc2640r2_sdk/1.30.00.25/exports/docs/blestack/btool_user_guide/BTool_Users_Guide/index.html#establishing-a-connection

Regarding compatibility: All of these BLE-Stacks are compatible, meaning they should all be able to connect to each other. Note that the compatibility between the host test embedded firmware and BTool needs to be ensured: You need to make sure to use the same SDK and BLE-Stack (blestack vs ble5stack in the CC2640R2 SDK). Please note: In some CC2640R2 SDKs, using btool.exe from the blestack folder will open the ble5stack version of Btool. To avoid this: Always use the .bat file to start BTool.

Cheers,

Marie H

0 Terrence Goh 7 months ago in reply to Marie H

Prodigy 110 points

Hi Marie,

Thanks for your input.

I re-compared the logs and made one change on board B: set address mode to "public" in ti_ble_config.h.

So now both board A and B are connected successfully.

As stated below, since Board B is running from a BLE5 project, RPA by public ID is enabled by default:
https://dev.ti.com/tirex/explore/content/simplelink_academy_for_cc23xx_8_10_05_00/_build_simplelink_academy_for_cc23xx_8_10_05_00/source/cc2340rx_07_ble_security_fundamentals.html#task-5-using-a-resolvable-private-address

1) Does projects build from BLE SDK v2.2.7 for CC2640 configure "public address mode" as the default? I am guessing this is the setting for my old peripheral board.

2) Could you please confirm if both boards need to use the same address mode for the connection to work? I’m not very familiar with Bluetooth specs, so I would appreciate your clarification.

+1 Marie H 7 months ago in reply to Terrence Goh

TI__Guru* 82341 points

Hi Terrence,

1) I am not sure, you would need to check the example.

2) No this is not necessary. However it is possible to filter on address type, so you should check your filtering in your scan settings.

Cheers,

Marie H

Bluetooth®︎

Bluetooth forum

CC2340R5: Connection issue between host test(ble stack) and basic ble application (ble 5 stack)