I am using a nRF52840-PCA10059 dongle to acquire data at a high rate (between 50Hz and 400Hz).
The connection is very unstable, after some seconds of acquisition, it sort of freezes: looks like the softdevice crashs as we stop receiving notifications and it won't respond to read/write requests (however we do not receive any information regarding a connection being lost).
I already reported a case here and it has never been fixed:
Surprisingly, we just noticed that having "nRF Connect - Bluetooth Low Energy" app opened (even if not connected to the dongle, just opened in Windows) makes everything work better:
- The services dicovery is much faster
- The connection is prefectly stable. I can receive notifications for hours
As soon as I close "nRF Connect - Bluetooth Low Energy", my other application stops receiving norifications an I observe the freeze.
Apparently, "nRF Connect - Bluetooth Low Energy" does something in the background that makes the dongle and/or the soft device be more stable. What could it be?
