1. Labview Serial Read Example
2. Labview Serial Read Buffer
3. Labview Serial Read Line
4. Labview Serial Read String

Does anyone know where a good LabVIEW Tutorial on Serial Connections (RS232). You acknowledge that you have read and understand our. LabVIEW Tutorial with.

I have also posted a tutorial on how to program arduino with labview. I have also posted projects using labview and microcontroller. In this complete list of labview tutorials and projects, you will learn how to use labview from every perspective. So here is a list of Labview tutorials. I recommend you to read these tutorials in order. Arduino Compatible Compiler for LabVIEW Discussions How to get Serial Read data in strings. How to get Serial Read data in strings. May 10, 2016 7:50 am. Forum Posts: 4. Member Since: May 10, 2016. Hello, I am simply trying to read serial data in the form of string and simply writing again in the form of. It then performs a serial port read, a serial port write, or both based on the options (read or write) that the user selects on the front panel. If both are selected, the VI will first write data, then read data, and finally close the VISA session that is opened to the port. It then performs a serial port read, a serial port write, or both based on the options (read or write) that the user selects on the front panel. If both are selected, the VI will first write data, then read data, and finally close the VISA session that is opened to the port. The read operation terminates when the termination char is read from the serial device. 0xA is the hex equivalent of a linefeed character ( n). Change the termination char to 0xD for message strings that terminate with a carriage return ( r). Timeout specifies the time, in milliseconds, for the write and read operations. The default is 10000. H) Timeouts can also occur when you read or write large amounts of data, since large data sets often take longer than the default timeout period of 2000 ms to transfer across the serial port. You can manually designate the VISA Session Timeout in different ways, depending on your development system.

Does anyone know where a good LabVIEW Tutorial on Serial Connections (RS232).Any help is appreciated.

Thanks.

dsolimano

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2 Answers

Pretty straightforward example:

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crlangloiscrlanglois

There are some complete apps in the Example directory. First of all, make sure that you don't have any hardware issues and check your serial port settings in OS configuration.

I hope you know that you can test your RS232 communication by connecting the Rx directly to the Tx pin.

Not the answer you're looking for? Browse other questions tagged serial-portlabviewserial-communication or ask your own question.

I have a problem of synchronization between data sent from LabView interface to Arduino.This is my code. I am using a SHT31 sensor to send temperature and humidity from Arduino to LabView after receiving a character specified. This part doesn't work correctly.I am using also a heating resistors activated by a random number in the LabView interface

Can anyone help me in putting interrupts in every event?

Edgar Bonet

Labview Serial Read Example

closed as unclear what you're asking by Code Gorilla, gre_gor, jfpoilpret, Greenonline, Enric BlancoJun 28 '17 at 10:23

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1 Answer

I tried to make sense of your code, but I didn't quite understandeverything, for two reasons:

• your question is not very clear, as you don't completely specify whatyou want your program to do

• the code itself is not always clear about what it's doing: somevariable should have better names and some more comments are needed tomake things clear.

These are also the most likely reasons you got a closing vote.

Despite this limited understanding, I tried to clean up the program.Here are the improvements I suggest:

1. The first thing to do is get rid of the timer. You are trying to readthe serial port both from a timer event and from serialEvent(),which makes little sense. You should also remove all unusedfunctions, variables and #includes, they only make your programharder to read.

2. Your getDecimal() function is a very misguided attempt to format anumber. If you call getDecimal(23.008) you get 8 (or maybe 7,depending on rounding), and you print it as 23.8. The simplest wayto get what you want is to let Serial.println() do the formatting.You can pass a second argument to specify how many decimal places youwant.

3. There is a bug in your usage of stringVal1 and stringVal2: youare always adding data to them, which will inevitably exhaust youravailable memory.

4. You always store a single character in your caract string,therefore this string can never be 'HU'. The easiest fix is to usesingle-character commands (e.g. “H” for humidity), then you don'tneed a String and you remove the risk of running into memory issues.

5. You should process input characters only as you read them. Readingthem in serialEvent() and processing them in loop() will get youout of sync, so do both in the same function.

6. Note that Serial.read() returns an int, which is -1 if there isno data available. Thus, if you are going to compare to specificvalues, you don't need to test for Serial.available().

7. If you set your heater index to a random number between 0 and 2, thenyou can use it as an index into an array of pins.

And here is a version of your program implementing all of the above:

Note that EXTRA_PINS is a very poorly named constant. You should findbetter constant names, but I couldn't figure out what you wanted to dowith those pins.

Labview Serial Read Buffer

Edgar Bonet

Labview Serial Read Line

Edgar Bonet

Labview Serial Read String

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