I am using a NRF52-based platform and have BLE code based on the ble_app_hrs_c Hear rate monitor system.
Having set up for scan, I see many device (we have a lot of beacons around).
I can also see the device I wish to connect to and even read values advertised, such as RSSI.
However, when I attempt connection, the call returns with the above error.
I looked a the SDK code (13.0.0) and that error seems to be invalid parameter.
I have checked through the parameters and they are as in the example. I did modify most of the parameters one by one to no avail.
I also checked the stack init, it is identical to the example.
I have no whitelisting.
Since the scan works, BLE is obviously operating.
Is there a noob issue I am missing, although I am not a noob to BLE or BT in general.
