Sporadic connection to nRF52 DK with pc-ble-driver

[tomtasjohan]

Hi,

we are trying to use pc-ble-driver (source and hex files from tag v3.0.0) together with nRF52 DK. We are running the heart rate example code on Ubuntu 16.04 (tried both in VM and native).

Problem is that it is extremely difficult to get a successful connection to the board. Most of the time we get "Failed to open nRF BLE Driver. Error code: 0x0D".

If plugging the USB in/out and restarting the application a number of times (succeeds in 1 out of ~20) the connection to the DK is established. Once a connection is established it will continue to work fine until we re-plug the USB.

This is extremely irritating and time consuming. Is these some trick to make the sd_rpc_open(...) always work? MSD is disabled in J-Link but it makes no difference.

Best regards,

Johan

[Bjørn Inge]

Hi,

there have been added fixes after v3.0.0 that addresses connection issues. Please try to use master branch instead to get these fixes, and see if that improves the situation. Thanks.

[tomtasjohan]

The master did not do a lot good but when I bumped my boost version from 1.58 to 1.66 the problem seems to have been fixed. Boost dependencies are always such a pain in a**, I really wish you hadn't gone that way :)

[Bjørn Inge]

So it got resolved just by upgrading Boost? Interesting.

I know what you mean wrt. Boost and pain, it's not fun to play with, though it provided stuff we needed, like serial port, threading, timing. Now that C++ has gained threading, Boost is included only for cross platform serial port support, for which it does a decent job with.