Sent data to all device with the same VID and PID

[Frank Neumann]

Hi,

who can help me to send data to all devices with the same VID and PID connected and not only on the last inserted index device?

I use the application from Jan Axelson for VB.net

thank you in advance
Frank

[Jan Axelson]

If the devices are HID class, edit the FindTheHid routine to open a handle to each matching device (don't quit after finding one) and perform the writes on each.

[Frank Neumann]

Hallo Mrs. Axelson,

I have try it but it is very difficult for me. Can you show me how du you mean it with a small example?

Thanks in advanced
Frank Neumann

[Jan Axelson]

One approach would be to create arrays of the needed values, for example mydevicedetected and myDevicePathName and HidHandle.

In FindTheHid, on detecting a matching device, set mydevicedetected(index) = true and save myDevicePathName(index). Get HidHandle(index).

Continue looping until memberIndex = devicePathName.Length

Each time you find another match, increment the index and set mydevicedetected(index) = true and save myDevicePathName(index) and HidHandle(index)..

At the end you will have an array of handles to use for writing data.