How to determine if a disconnection is due to a bad signal (signal loss)

RE: How to determine if a disconnection is due to a bad signal (signal loss)

Ole Morten — Fri, 28 Mar 2014 12:03:55 GMT

You should never see values like this, so this sounds very strange. Could there be some issue with how you use this value? Could you share the code you're working with?

RE: How to determine if a disconnection is due to a bad signal (signal loss)

Sébastien Despont — Fri, 28 Mar 2014 08:59:44 GMT

Hi Hung,

Thank you for your answer.

You are right, the reason is 0x08 when the device is out of range. But after some tries, the disconnected reason sometimes weird values like 0x90, 0x8F, 0x4E, ...

As these values are not existing in the documentation, it is a bit unclear. Do you have some explanation?

FYI I am using SDK 5.2 and softdevice 110 6.0

RE: How to determine if a disconnection is due to a bad signal (signal loss)

Hung Bui — Thu, 27 Mar 2014 12:31:59 GMT

Hi Sebastien,

In case of signal loss, (no connect event receives from master until timeout occurs) you will receive Disconnect event with reason = BLE_HCI_CONNECTION_TIMEOUT (0x08). You can find this in our linkloss service (ble_lls.c) example.

You can test this by move the device out of range or power off (remove battery) the phone or unplug the dongle if you test with Master Control Panel.