Qt Medical

Hi, when your esp device sends data, is it using the same tcp connection or a new one?
If it is using the same (it is preferred) I suggest you to define an object for each device with a dedicated buffer.
If not please check if the device wait to have sent all bytes in the queue before to disconnect form the server.
I made more then one sofwtare based on Qt to manage iot devices based on tcp or rs232.
I suggest you to use a thread for each connection (if they are not so much, for example less than 1000) or to manage more than one connection for each thread.
Using a thread, it is more easy to implement a machine state to manage the device.
Pay attention ad the function readSocket. if the device sends for example 64 byte in one socket operation, the function could be fired more than one time.

My own investigation showed that the QtConnectivity library isn't providing the necessary API to implement this service. Specifically, I missed two key functionality: returning specific error codes to client read/write requests, and having support for control point characteristics.

We ended up writing our own BLE GATT library that interacts with BlueZ directly over D-Bus instead. The BlueZ D-Bus API offers everything needed for ACS, but I did find one critical bug in BlueZ's implementation that affects this functionality:
https://github.com/bluez/bluez/issues/460

We have the Qt BLE framework implemented, but ACS itself is planned at a later stage.

Same issue here, are you using Qt 3D with Intel Integrated Graphics?

Hi and welcome to devnet,

You can find more information about that subject here.

For the chart did you call addAxis() and add the x axis to the chart? Also did you do the same thing with the line series calling attachAxis?

Hi @dridk2 ,
I wish to help you with this project.

From the compile output, it looks like your target doesn't have libiw-dev installed (ld error: cannot find -liw).

On the target device, try

apt-get install libiw-dev

if you haven't figured this out yet.

You could also use the cross-compiler to build libiw from scratch and install into the target architecture area.

greetings,

is it here only for devices or bio-informatics?

Klingt interessant

@vivekyuvan QWT has an example oscilloscope it would help you greatly. reference it.example