Any API function to query if discovery box is still connected or disconnected?

[chuqdd]

as title

[JColvin]

Hi @chuqdd,

You can use FDwfEnum to enumerate all of the devices and see if a device you are previously using is still listed.

Or if you are wanting to check if a known device is has already been opened, I would probably use FDwfEnumDeviceIsOpened.

You might also find the Device_Enumeration.py example helpful.

Let me know if you have any questions.

Thanks,
JColvin

[chuqdd]

Thank you!

[attila]

Hi @chuqdd

The enumeration may not detect device disconnect immediately if there is software connection to it, due to global cached information.
If your software is connected to the device, check the return value of any function that communicates with this, like FDwfAnalogIOStatus. If this is zero use FDwfGetLastErrorMsg for details and call FDwfDeviceClose to allow cached information to be update.