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It's generally not up to me to have a preference. I have to work with the protocol chosen by the designer of the devices I'm communicating with. When I do have a choice I like VISA for talking to test instuments and TCP/IP for talking to computer-based devices.
LabVIEW Pro Dev & Measurement Studio Pro (VS Pro) 2019 - Unfortunately now moving back to C#, .NET, Python due to forced change to subscription model by NI. 8^{
For talking between my cRIO and PC, I bounce between Network Steams and TCP/IP (STM). Of cource it depends on exactly what I have to pass between the two systems.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions Unofficial Forum Rules and Guidelines "Not that we are sufficient in ourselves to claim anything as coming from us, but our sufficiency is from God" - 2 Corinthians 3:5