Bluetooth connection problem

RE: Bluetooth connection problem

Kenneth — Wed, 31 Oct 2018 21:10:24 GMT

Removing a device on a host will have no effect on the peripheral, meaning that the peripheral will not know that the host have removed the device.

The device will assume that it should connect to the same host until you explicit decide otherwize by disable whitelist to allow for a new host to connect.

Kenneth

RE: Bluetooth connection problem

Kenneth — Wed, 31 Oct 2018 21:10:22 GMT

Removing a device on a host will have no effect on the peripheral, meaning that the peripheral will not know that the host have removed the device.

The device will assume that it should connect to the same host until you explicit decide otherwize by disable whitelist to allow for a new host to connect.

Kenneth

RE: Bluetooth connection problem

bscdb — Wed, 31 Oct 2018 20:12:19 GMT

So how does disabling whitelist affect bluetooth connection? Does a power cycle from the nrf DK or the host machine remove the physical connection?

RE: Bluetooth connection problem

Kenneth — Wed, 31 Oct 2018 20:05:41 GMT

If you want to connect to another central, then you will have to temporary disable whitelist yes.

Best regards,
Kenneth

RE: Bluetooth connection problem

bscdb — Wed, 31 Oct 2018 20:02:19 GMT

I not sure as to where this function should be called. It is called inside bsp_event_handler(). So are you suggesting to disable whitelist?

RE: Bluetooth connection problem

Kenneth — Wed, 31 Oct 2018 19:25:35 GMT

Have you tried calling ble_advertising_restart_without_whitelist(&m_advertising);

Kenneth

RE: Bluetooth connection problem

bscdb — Wed, 31 Oct 2018 19:21:36 GMT

Hi Kenneth,

As per your suggestion, switching from SDK 15 to SDK 15.2 works for re-connecting the bluetooth device. No issues there. But now what is happening is unless I remove the device from one host machine, I cannot connect to the other machine. So is there any way that if the host machine is shut down, the bond information is erased automatically and I can connect nrf to other machine without removing the bluetooth device from previous machine.

RE: Bluetooth connection problem

Kenneth — Tue, 30 Oct 2018 15:11:16 GMT

Sounds to me that the case then may be that you need to allow repairing. Can you try to add the following to pm_evt_handler() in main.c

// Insert in pm_evt_handler() in main.c

        case PM_EVT_CONN_SEC_CONFIG_REQ:
        {
            // Allow or reject pairing request from an already bonded peer.
            pm_conn_sec_config_t conn_sec_config = {.allow_repairing = true};
            pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
        } break;

RE: Bluetooth connection problem

Kenneth — Tue, 30 Oct 2018 12:36:51 GMT

1. There have been some issues with re-connection in Win 10, you may want to make sure to download the latest build of Win 10, or possible get the preview insider build from Microsoft to test directly that the issue is resolved. Also for testing you should consider using SDKv15.2 since that has a fix regarding directed advertisement that may have an effect on re-connection time.

2. You will likely need to disable whitelist if you want to connect with a new central, there should be a start advertising without whitelist api call if I remember correctly.

RE: Bluetooth connection problem

bscdb — Mon, 29 Oct 2018 23:46:11 GMT

I am using nrf52 DK. No changes made to the code. "I remove the bluetooth device" meaning I unpair the connected Nordic device. I tried pressing buttons 1,2,3,4 and the reset button and restarting the computers and the DK.

RE: Bluetooth connection problem

awneil — Mon, 29 Oct 2018 19:11:24 GMT

On what have you implemented the hid keyboard example?

Have you made changes to the example?

[quote userid="73596" url="~/f/nordic-q-a/39957/bluetooth-connection-problem"] I remove the bluetooth device[/quote]

What do you mean by that?

[quote userid="73596" url="~/f/nordic-q-a/39957/bluetooth-connection-problem"]I have to again flash the code with the soft device (SDK 15) to make it wor[/quote]

What else have you tried?

Does a reset not work? Or power-cycling?