Linux: WL8 BLE connection fail issue

Which, stack are you using? Is it Bluetopia or BlueZ?

Thanks

Hi Hari:

blueZ.

Austin

Hi,

Andy updated??

Austin

Hi autsin,

How, does your shell script for the test looks like? Is there a delay between 2 consecutive connects? Can, you take BT snoop logs on the host to see, where it is failing?

Thanks

hi Hari:

the command is simple

gatttool -b BD_address --char-read -a 0x001F

sleep 5

the host log is connect error: Transport endpoint is not connected (107)

we also tried hcitool cmd lecc command also has the same fail rate.

Austin

Hi,

Any updated??

Austin

I tried it on my setup with AM335x EVM and Wlink8, but can't reproduce the issue.. It seems to work fine..

root@am335x-evm:~# ./ble-test.sh
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
Characteristic value/descriptor: 02 20 00 29 2a
root@am335x-evm:~# cat ble-test.sh
#!/bin/bash
for i in {1..20}
do
gatttool -t random -b 7A:60:26:50:B5:90 --char-read -a 0x001F
sleep 5
done
root@am335x-evm:~#

HI Hari:

Did you test in open office??

Please you do more than 200 times.

Austin

HI Hari:

Can you share BlueZv version and your bts file to me?

Thanks.
Austin

Hi Hari:

Can you try to connect two or more BLE devices??

I tested official bts from TI with single ble in shielding room.

The CONNECT_REQ still miss when I got connection fail(connect error: Transport endpoint is not connected (107)).

Did you know why CONNECT_REQ  didn't sent from WL8??

Any comment on this issue??

Thanks.

Austin

Hi Austin,

I tried with LightBlue (iPhone app), acting as GATT server for my test. I tried with more than 300 iterations, with a 2 sec sleep in between. It seems to work just fine.. As, i said - i used AM335x with TISDK5.02 release (Bluez5.46). Can, you take FW logs with HCI /LMP events enabled?

www.ti.com/.../swau058d.pdf

Thanks

hi Hari:

Please check attached file.

0304.zip

Hi Austin,

Is it the last connect failure you are referring to?

6352 03/03/19 21:00:23.952 +0:01:31.870 0x00148A78 0x00148A79 HCI_LE_Create_Connection ---->
6353 03/03/19 21:00:23.953 +0:01:31.871 0x00148A79 0x00148A7A <---- HCI_Command_Status_Event
6430 03/03/19 21:00:25.966 +0:01:33.884 0x001490C9 0x001490CA HCI_LE_Create_Connection_Cancel ---->
6431 03/03/19 21:00:25.967 +0:01:33.885 0x001490C9 0x001490CA <---- HCI_Command_Complete_LE_Create_Connection_Cancel_Event
6432 03/03/19 21:00:25.968 +0:01:33.886 0x001490C9 0x001490CA <---- Hci_LE_Generic_Report_Event

If so, it appears the Host is cancelling the Connect, after 2 secs. I think, you may want to try increasing the Bluez LE connect timeouts (..
#define HCI_LE_CONN_TIMEOUT msecs_to_jiffies(20000) /* 20 seconds */

#define HCI_LE_AUTOCONN_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */

And, you would need to rebuild the kernel.

Thanks