How to read the Serial Arduino data using labview VISA?

Hi =). Im a beginner work reading data series from an arduino but im facing... Lets do it step by step

I built a voltage divider circuit which gives from output
from 0 to 5V. The output of this circuit is sent to a 0 analog input pin
of a Committee of Arduino Duemilanove.

(1) Firstly, I connected the cable to connect to my laptop USB the Arduino.

(2) I went to start-> control
Control Panel-> system-> hardware-> Device Manager. Check the Ports (COM
& LPT). In my laptop I can see USB Serial Port (COM4). Now I know only in
LabVIEW that I must read the data series COM 4.

(3) to the side of the arduino, here's the code to read changes in voltage
entered to analog pin 0. The last line of 'delay' determines the sampling
Rate of how we want to taste the output of the voltage divider:

int potPin = 0;    Select the input pin for the output of the voltage divider
int val = 0;       variable to store the value from the probe

void setup()
{
Serial.begin(9600) (9600);    Opens the serial port, establishes the rate of 9600 bps data
}

void loop() {}
Val = analogRead (potPin); read the value of the voltage divider
Serial.println (Val);
Delay (10);
}

I slightly modified the basis series reading writing VI... I have
attached the block schema used with comments. Basically, I tried to read
data series, divide by 1023 and multiply by 5 to graphic voltage
variations of the voltage divider circuit.  But Im not getting
the correct voltage output values. The value of the tension just keeps go
0 and coming again, as shown in the photo.

Could you guys please guide me on what went wrong?

Thank you!

-you read the data, even if there is no data on the port. If 0 bytes are read => «»

-in the case of false, you resources VISA wired for the output of channel tunnel?

-There is no close VISA at the end of the VI resources

-you're not a loop this VI reading bytes

I added an addaption of your VI that you should give a try maybe

Tags: NI Software

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