Report Making USB-8451 work with PXI running LabVIEW RT / Phar Lap ETS in Hardware Posted March 8 · Edited March 8 by codcoder On 3/5/2021 at 7:24 PM, Gribo said: You can reverse engineer the protocol with NI-trace. It is quite trivial. Do you have any examples about this you can share? Becuase I tried using NI-Trace -- and perhaps it's about my lack of knowledge about the tool -- but to my understadning what was logged was nothing but the "high level" writes to property nodes and sub-vi's which I did in my top-level vi's. There were no information about the underlying USB communication.