USB Serial Port Blocking Communication with USB DAQ

[AmirNaqwi]

The attached VI is written to acquire data from a device connected to a USB serial port. The data is processed and the result is sent to myDAQ's AO0 channel through another USB port. The VI works without showing any error, but the data is not sent to myDAQ. I do not see it on AO0 channel. I have validated the functionality of myDAQ using a simplified VI which does not include USB serial port communication.

Any help in fixing this problem will be much appreciated.

[ZYOng]

No VI was attached.

Please re-attach the VI, preferably in 2019 or earlier.

[AmirNaqwi]

Thanks for your prompt response.

Not sure why vi didn't go through. Re-attaching.

[crossrulz]

Can you give more details on the serial communications messaging protocol?  Do you have to request data?  Is there a data frame?  What is the format of the data?  It looks to me like you are not interpreting the data correctly.

[AmirNaqwi · Accepted solution]

Resolved myself. I needed 'sample on demand' in DAQ Assistant, not 'continuous sampling'.