Labview interface with Arduino using Serial port 1

[Priya.dharshini]

Hello All,

Im trying to communicate with Arduino from Labview VISA. Is it possible to select hardware port such as Serial1, Serial2 etc other than Serial0 in VISA. As Labview LINX provides such options for selecting UART channel. If it is possible please help me how to do in VISA.

Thanks in advance:)

[crossrulz]

The VISA Resource control is a drop down that will show all available VISA connections/sessions.  If there is a serial port, it will likely show up as a "COM" device.

[Priya.dharshini]

I think my question is not clear.

Crossrulz, as you said it is true if there is serial port it will appear as COM device.

But what I want to achieve is, for eg, If my serial device is Arduino MEGA then this will be detected with COM port number in VISA drop down control. Then VISA uses default hardware serial TX0 and RX0 for communication. Instead how can I achieve VISA communication with TX1 and RX1 in VISA between pc and arduino MEGA

[crossrulz]

Are you referring to the serial ports on the Arduino?  If so, then it is just a matter of which pins you are wired up to.

[Priya.dharshini]

Are you referring to the serial ports on the Arduino?

yes Serial0, Serial1, Serial2 kind of...

 If so, then it is just a matter of which pins you are wired up to.

how that can be done in VISA

[crossrulz]

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@Priya.dharshini wrote:

Are you referring to the serial ports on the Arduino?

yes Serial0, Serial1, Serial2 kind of...

 If so, then it is just a matter of which pins you are wired up to.

how that can be done in VISA

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VISA is not running on your Arduino.  What I was referring to is a hardware connection between a serial port on your computer and one of the serial ports on your Arduino.  Software cannot control where your cable goes.

[RTSLVU]

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@Priya.dharshini wrote:

VISA uses default hardware serial TX0 and RX0 for communication. Instead how can I achieve VISA communication with TX1 and RX1 in VISA between pc and arduino MEGA

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The USB serial port is HARDWIRED on an Arduino to Tx0 and Rx0 (UART0) you can not change this.

[RTSLVU]

Too late to edit my original response so...

This has nothing to do with LabVIEW or VISA because VISA is going to use whatever serial virtual port Windows assigns the Arduino or USB to serial converter.

I am not saying you can't use a different UART in the Arduino (at least the ones with more than one UART) but you are going to have to build the RS232 to logic or use a separate USB to serial (3.3v or 5v) logic converter and wire it up to the proper UART pins on the Arduino.

Communicating with an Arduino using VISA and serial (rather than using LINX) is no different than communicating with any other device on a (virtual) serial port using VISA.

In fact I say it's easier because you are programming the Arduino, so you have full control over the serial protocol, queries, commands, and Arduino responses.

[joars]

You have mentioned in the above post using RS232 to logic we can read data from serial1 or 2 in Labview. How to achieve this, What is that logic can you brief it out?

I need to read from serial port 3 of Arduino in Labview.

Any help is highly appreciated