Bluetooth connection problem

[bscdb]

Hi,

I am working with hid keyboard example on my Windows machine.

Problem 1 : After flashing the code, I make bluetooth connection and the code works properly. Then I remove the bluetooth device and if I try reconnecting, it does not connect. So I have to again flash the code with the soft device (SDK 15) to make it work.

Problem 2 : Bluetooth connection has been made with laptop 1 and the laptop is shut down. Now I try to connect to bluetooth of laptop 2; does not connect although I remove the device from laptop 1.

[Kenneth]

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.

[bscdb]

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.

[Kenneth]

Have you tried calling ble_advertising_restart_without_whitelist(&m_advertising);

Kenneth

[bscdb]

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?

[Kenneth]

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

Best regards,
Kenneth

[bscdb]

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

[Kenneth]

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

[Kenneth]

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