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

[Tim Hwang]

Target nRF52832(nrf52dk_nrf52832)
SDK NCS v2.0.0

One of my customer expects such a scenario.
1) BLE accept first connection.
2) If BLE have another connection, BLE disconnect previous connection, so that BLE have one connection. (always have last connection)

I changed CONFIG_BT_MAX_CONN from 1 to 2.
But I'm having trouble with handling disconnect previous connection.

Do you have good idea?

[Vidar Berg]

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

[Tim Hwang]

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?

[Vidar Berg]

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.

[Tim Hwang]

(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.

[Vidar Berg]

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

[Tim Hwang]

Thanks for updating. I'll test it.