CC2640R2F: meaning of error code 0x31 for GAP_LinkEstablished HCI event

Terrence Goh

Part Number: CC2640R2F
Other Parts Discussed in Thread: LP-EM-CC2340R5, CC2340R5, CC2640

Tool/software:

Hi,

I have a board with CC2640R2F that is configured as a BLE 4 HCI controller. While debugging a BLE connection scenario, I get the error code as stated in the title. What is it and where can I find the description of the HCI error code?

Thank you.

7 months ago

+1 Jan 7 months ago

TI__Mastermind 42100 points

Hi,

Thank you for reaching out. The 0x31 return code is the bleGAPConnNotAcceptable event (linked below):

https://dev.ti.com/tirex/content/simplelink_cc2640r2_sdk_5_30_00_03/docs/ble5stack/ble_user_guide/doxygen/ble/html/bcomdef_8h.html#acbc802586a3a744e3b99c28487ede73c

The reason for this error is that the connection could not be established properly. The following E2E threads provide some details:

https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/519039/blegapconnnotacceptable---who-recieves-this-error-code-central-peripheral

https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/746671/rtos-cc2640-ble-advertisement-does-not-stop-until-incoming-connection-is-received/2761885?tisearch=e2e-sitesearch&keymatch=bleGAPConnNotAcceptable#2761885

Best Regards,

Jan

0 Terrence Goh 7 months ago in reply to Jan

Prodigy 110 points

Hi Jan,

Thanks for the links. I'll investigate it further.

My mistake - I have a board with CC2640F128 built with ble_sdk_2_02_01_18 as a HCI controller with another MCU. It is configured as BLE central with BLE 4.2. I have another LP-EM-CC2340R5 board built with latest SDK BLE 5.0 stack running basic_ble application, as a BLE peripheral. In theory, establishing a BLE connection between these two boards should be straightforward and backwards compatible. Since the SDK releases are pretty far apart, would it cause any issues to be incompatible, BLE connection wise?

0 Jan 7 months ago in reply to Terrence Goh

TI__Mastermind 42100 points

Hi,

No problem! BLE5 is backwards compatible, so the CC2340R5 should be able to connect to the CC2640 device.

Best Regards,

Jan

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CC2640R2F: meaning of error code 0x31 for GAP_LinkEstablished HCI event