Hi Simon,
On 14/12/2020 16:36, Simon FEUTRIER wrote:
I don't really have something useful to share and my code is quite big.
Moreover it is mainly inspired by the lowEnergyScanner example.
Here is my algorithm for BLE :
-> MainWindow initiates a class called "apiComBluetooth".
-> Then MainWindow calls ApiComBluetooth.startDiscovery() which is just
QBluetoothDeviceDiscoveryAgent.startDiscovery()
-> After 5 seconds, the ApiComBluetooth receives the signal of
discoveryFinished. It sorts devices that I want and stores them in a
list of BleDevice (bluetooth device class like in the lowEnergyScanner
example).
-> Then the (only) service that I use starts to be discovered for each
BleDevice created.
-> To write or read to a specific device, MainWindow just accesses the
right device in the BleDevice list using an index.
"WriteCharacteristic" or messages received in the FIFO are managed
directly in the BleDevice class of the device.
My experience with BLE on Windows is, that everything is really
sensitive when it comes to devices/BLE dongles and drivers. Can you give
more information on the hardware you are using?
Windows API does not have the concept of connecting to a BLE device, so
what we do behind the scenes is reading a characteristic if the device
is not connected. This will trigger a connect that is initiated by the
operating system. So the influence we have on the connection behavior
itself is quite limited. Perhaps the hardware you are using at least
gives some input.
Cheers, Olli
I don't know if this information can help you, thank you !
Best regards,
Simon Feutrier
Le lun. 14 déc. 2020 à 16:05, Andreas Buhr <andreas.b...@qt.io
<mailto:andreas.b...@qt.io>> a écrit :
Hi Simon,
On 14.12.20 15:25, Simon FEUTRIER wrote:
> But when I write in the characteristic of the second remote
device, the
> connection with this device is immediately lost (Invalid service
: loss
> of connection with the underlying device)
Would you be able to share more information? Could you share your code?
best,
Andreas
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