Driver error when trying to pair with Windows 10 computer

[grzegorz]

I'm writing code for PCA10040 basing on UART/NUS example. There are no big changes: different UUIDs and just one characteristic for both reading and writing. I can connect using nRF Master Control Panel without any problem. But I can't on Windows 10. The board is discovered but Windows can't pair with it. After pairing attempt there is status "Driver error". When I look a device manager there is an exclamation mark at my board. The status code is 10: This device cannot start. Additional code is STATUS_DEVICE_POWER_FAILURE. I have different board with ST's BlueNRG-MS BLE chip with exactly the same GATT services and it works perfectly with Windows 10. I tried to add static PIN but it didn't change anything. Windows doesn't even ask for PIN, it just fails during pairing.

My question is: what Windows 10 needs to pair? What should I add to BLE stack initialization?

EDIT: Some screenshots:

Nordic UART example ready to pair, paired and connected.

My code running on board discovered by Windows and ready to pair:

Driver error after failed pairing:

Error in Device manager

[Hung Bui]

@Emil: I guess it will be the same for the UART profile, if you disconnect when Windows discovery service you will also get Driver error?

[grzegorz]

@hungbui: I've finally found the problem. It was this line: APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false); I thought it's needed by sensor simulator for updating simulated measurements and I removed the line. But it turns out it's neccessary for Bluetooth as well.

[Hung Bui]

@grzegorz: well it's not obligated to have the app timer running for BLE to function. However, some of the modules use app timer, such as the connection parameter module. This could be the reason why you had driver error.