[nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Wed, 28 Sep 2022 07:09:49 GMT

I could accept new incoming referring peripheral_hids_keyboard sample.

Thank you.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Mon, 26 Sep 2022 01:09:18 GMT

I have just found bt_conn_unref(current_conn) is related this issue.
I will do some test with NCS200\v2.0.0\nrf\samples\bluetooth\peripheral_uart then do some test my target project.

Then I'll update this case.
Thank you.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Mon, 26 Sep 2022 00:39:19 GMT

Hello.

In my test, although CONFIG_BT_MAX_CONN is 3 and bt_le_adv_start() was called with no error when disconnected, Nordic did not start advertising until all connections are removed.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Vidar Berg — Fri, 23 Sep 2022 07:37:11 GMT

Hi,

As a test, can you try to increase CONFIG_BT_MAX_CONN to '3' and comment the call to bt_le_adv_start() inside the disconnected callback?

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Fri, 23 Sep 2022 03:57:09 GMT

Can you please update it?

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Tue, 20 Sep 2022 05:31:59 GMT

devzone.nordicsemi.com/.../rttLog.txt

sample: d:\NCS200\v2.0.0\nrf\samples\bluetooth\peripheral_uart

Test step
1. Prepare two Android: EF550, HF550 (Bluebird Android handset. Qualcomm AP)
2. Connect EF550 from Android (Nordic app): connected
3. Connect HF550from Android (Nordic app): connected
3. Disconnect EF550: disconnected
4. Disconnect HF550: disconnected
5. Connect EF550 from Android (Nordic app): connected
6. HF550 and All another Android cannot scan Nordic BLE
(No pairing)

changes
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2
devzone.nordicsemi.com/.../peripheral_5F00_uart.0.7z

I add bt_le_adv_start() when disconnected, it was not effective for me.

BTW, When I disconnect all connection, Advertisement was resumed.

Do you have any idea?

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Tue, 13 Sep 2022 23:42:11 GMT

Thanks for updating. I'll test it.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Vidar Berg — Tue, 13 Sep 2022 09:54:44 GMT

Does your application start connectable advertising again after disconnecting from phone A?

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Tue, 13 Sep 2022 00:03:45 GMT

(Sep 8 ~ Sep 12 was holiday season in South Korea so that I cannot answer your mention.)

1) Android A connect to BLE.
2) Android B connect to BLE. Android A is disconnected.
3) Android A try to connect to BLE again, but no connection was made with any log.

This is what I'm experiencing.
I thought Android A, Android B can connect BLE sequentially.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Vidar Berg — Thu, 08 Sep 2022 10:17:53 GMT

Hello,

You will not be able to establish a third connection if CONFIG_BT_MAX_CONN==2. But is that what you want? You indicated earlier that you only needed 2.

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Tim Hwang — Tue, 06 Sep 2022 06:31:52 GMT

Thanks for reply.

I could manage to get second connection.

In this time, I cannot make third connection. Nordic log did not show any incoming connection.

I disconnect existing connection when new connection is made. Is it right scenario?

Can I have another option to disconnect existing connection smoothly?

RE: [nRF Connect SDK]How to accept new incoming connection and disconnect existing connection

Vidar Berg — Mon, 05 Sep 2022 14:16:04 GMT

Hello,

This should not be a problem to do. What happens when you try to disconnect, do you get an error?

Relevant APIs:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.2/zephyr/connectivity/bluetooth/api/connection_mgmt.html

Best regards,

Vidar