I don't think the issue is with Labview code. It appears you are not clear as to how Arduino works. Arduino is just an slave serial device. That means, arduino does only what you communicate to it via VIs and firmware it understand. That is, you either use an existing VI and firwmware that is written already written for Arduino, or you create VIs that are tailor made and the firmware is modified to understand it Strongly suggest you to go to LINX and use firmware and VIs that are already existing there and if needed, start by modifying a working one Regards, Barddya.

NI LabVIEW 8.5.1 Upgrade for SSP Customers – Compatibility, Bug Fix. If you have installed a previous version using your serial number. Laboratory Virtual Instrument Engineering Workbench (LabVIEW) is a system-design platform and development environment for a visual programming language from National.

Barddya wrote: I don't think the issue is with Labview code. It appears you are not clear as to how Arduino works. Arduino is just an slave serial device.

That means, arduino does only what you communicate to it via VIs and firmware it understand. That is, you either use an existing VI and firwmware that is written already written for Arduino, or you create VIs that are tailor made and the firmware is modified to understand it Strongly suggest you to go to LINX and use firmware and VIs that are already existing there and if needed, start by modifying a working one Regards, Barddya He writes that he is able to communicate with the Arduino using NI-MAX's VISA Test Panel. If that is the case, then he should be able to use LabVIEW instead. Download The Amazing Spider Man Game Demo Pc. When the VISA Configure Serial Port.vi runs, a reset is asserted on the Arduino since VISA toggles the DTR line. The Arduino will start to reboot then. It takes a few seconds for this to complete. Since you send the message without delay, the Arduino is not listening yet.

When you communicate with the Arduino using MAX, there is only one serial port initiation so the Arduino doesn't reboot with each communication. You could add a few lines to the Arduino app to make it send a message after it boots and have LabVIEW wait for the message to arrive by monitoring bytes at the port..

Alternately you could use a VISA property node to monitor the LabVIEW serial port and wait until DSR is set, then send your message. First, I should have looked at my notes before I dashed off that reply.