Esc Command to serial Port

I'd like to send an esc command to the serial port in my LV-application. how I can do that ??
I tried to use write to serial port and \1b as string but it not worked.
In a terminal programm it works with the ESC key and with ALT+027.

Hi,
You have to be careful with the kind of datas that you send...
You told that you sent \1b or something like this, but did you sent this in Ascii mode or \ mode... It's very different for the device...
Maybe you have to write as a constant in \ mode the code \1b, and after that convert this string type to ascii mode using the roght button on the constant and then send the character to the device

Similar Messages

To send multiple operation commands to serial port

My AC power source is able to communicate to PC via serial port using LABView and I can perform any operation by giving commands in Hex individually, But when it comes to the parallel operation of all the commands or to put them in a particular sequence. I am failing to do so.

You can only send 1 command at a time. That is just bus communications 101. But you can string together many VISA Writes to send the individual commands, one after the other.
But since if sounds like you are doing this on a GUI based instance, what you want to do is configure the port before your loop and close the port after the loop. Then inside your loop you just have an Event Structure to key off of the different controls changing values. You just send the command you need to inside of each event case.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions

Want to use dotNet with teststand, but unsure how to send commands through serial port

I have a loCom communication dll used to send and recieve commands through serial comunication for a particular product. I the past they have used a LabVIEW wrapper to send and recieve commands, using this particular dll. I would like to just use testStand for the DOTNET Dll. I can get the commands, know the inputs and outputs required, however I can not figure out how to send the commands to the serial port. Anyone have any exprience doing this in TesSTand?

hallawt,
With your .NET code module, you should be able to call it directly, most likely as a parameter in the .NET method.
What are the inputs for the method you're trying to use?
Also, could you clarify where you're starting to have problems in your project?
Regards,
Renée M
Applications Engineer
National Instruments

How to send a command in Hex to serial port

I need to send the following command to serial port
[SS] [1] [CR] to serial port , how do i do that in Hex

Norman,
Learn to write a single commands and get back a valid replies first, before
you try to develop an app to continuously communicate with the instrument.
Once you get the command set down, you can plug them into your state
machine.
Attached is a VI about ASCII to HEX and Carriage Returns.
Parks
"Noman" wrote in message
news:[email protected]..
> I need to send the following command to serial port
> [SS] [1] [CR] to serial port , how do i do that in Hex
[Attachment SS1 to Serial Port.vi, see below]
Attachments:
SS1_to_Serial_Port.vi ‏30 KB

Hyperterminal to serial port

I use the hyperterminal to communicate and send commands to serial port COM1.
On the hyperterminal window, I used to type such a command:
AT+ZV SPPCONNECT.......
This command is sent to the device connected to the COM1 port.
Now I want to cancel the hyperterminal, and sue a Java program.
I used the javax.comm library to build a java application that communicates with the COM1 port.
Inside that program, I connected to the COM1 port. How do I send that text command from inside the java program to the COM1 port. There is a method called (send) inside the (serialport) class, do I just say:
serialport.send "AT+ZV SPPCONNECT.......".
I mean, is sending text commands through the hyperterminal simply equivalent to sending those text commands to the COM1 port using the java application described above.
Message was edited by:
lrantisi

I wouldn't see how it could be otherwise.
Did you try it?

Serial Port on SBRIO

How do I connect two components (A LCD Display and a Battery Charger) to a single serial port on a SBRIO 9642?

Depending on the nature of your two serial devices, you may be able to use a serial port combiner or switch like these devices from B&B electronics:
Serial Port Combiners: Good for intermittent data sources, but Tx data from the host is broadcast to both devices, which may cause undesired behavior in your device if the devices share any common or similar commands.
Serial Port Switches: More flexible for communicating with multiple devices because the Tx data is sent only to the desired device. The downside is any LabVIEW instrument driver you may be using will have to be modified to account for the extra "addressing" commands the switch uses to determine which device you want to talk to.
This is the only way I know to communicate with two devices using only one serial port. One downside of both approaches is they limit the bandwidth available because only one device can communicate with the Single-Board RIO at any time. If one device communicates often or continuously and the other is an intermittent device, you may have trouble getting the intermittent data through the switch or combiner because the first device to communicate gains access and blocks the other port until the communication is complete.
If you need a dedicated serial port for each device, you have a few of options for adding ports to Single-Board RIO, depending on your needs for ease of integration, size, and cost.
Easiest option, use an Ethernet based RS-232 device. Downside, extra cost of an ethernet hub and ENET-232 device, but it does offer native VISA support from Single-Board RIO.
RS-232 C series module: The NI 9870E module adds 4 RS232 ports to Single-Board RIO. Downside, added cost and size of Single-Board RIO system, and the serial ports are not supported through VISA, so an RT interface layer and driver must be written in LabVIEW FPGA.
Most difficult work, but lowest cost option, Emulate RS232 port in LabVIEW FPGA: Depending on your devices, you may need to add an RS232 transceiver to the front end of your FPGA DIO lines to make this option work, but many devices can work with an "RS232 TTL" level signals. This would be very low cost, but again this option does not provide VISA API support, so any instrument drivers you may have would need to be ported to your custom FPGA-232 driver API.
Hopefully this clearly lays out your options and tradeoffs for adding serial ports to Single-Board RIO.
Cheers,
Spex
National Instruments
To the pessimist, the glass is half empty; to the optimist, the glass is half full; to the engineer, the glass is twice as big as it needs to be...

Send command to modem using serial port and capture the response in the labview

hello.
I am doing my shool project.
I want to send command to modem using serial port and get the response in the labview.
When i run my program and enter"AT", only messy code will be displayed.
can anyone help me? thanks

Dora0512 wrote:
Thanks for you all. My partner got it already.
I am doing send sms part.
Can anyone tell me why my program is not so steadily?
It means this program can run. But somtimes I cannot receive sms. sometimes can
Basically, it is not well-written from both a LabVIEW and a communications point of view. Unfortunately, I can't elaborate because today is an exrtremely busy day at work. I'm hoping this bump will prompt someone to help you with your problem. If you could also provide us with the programmer's guide or the manual for your equipment, that would be extremely helpful.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

Sending an ESC code using the serial port

I have a motor control aplication that requires sending an ESC character using the serial port. LabView has several built-in functions (end of line, line return, etc.) but I just do not know how to send this particular code using the serial port. Any ideas?

The hex code for ESC character is 1b, Try writing it in a 8 bit unsigned number and then change that byte to charachter using labview function "byte Array to string". In this way you can pass this charachter.

How do I monitor serial port activity without first sending a command?

In my application I am sending a command through the serial interface and I want to monitor the response. The response is not instant, in fact it is a timeout response indicating the requested action did not work. How do I monitor so I can parse what is coming in over the serial port without necessarily sending a command?

You can always place a loop where you monitor the number of bytes at the serial port.
After configuring your VISA serial port session, you can create a Property Node to get the number of bytes available at serial port.
You can then process this information, for instance:
1. Establish a timeout because you never get a response.
2. Do serial port read if there is data available.
You can exit the loop with a timeout condition or having processed the data.
-JLV-

VISA (Serial port) commands fail in the VI, but work in VISA test panel

Hi, I have an instrument which has a usb connection. When I connect it to a Windows 7 PC, it automatically picks up the driver and shows up as a "USB Serial Port (COM7) (Manufacturer is FTDI).
When I open up NI MAX, this device shows up as COM7 (ASRL7::INSTR) under "Serial and Parallel". And, when I click on Open VISA Test Panel, and try the "*IDN?" command, it works OK.
However, the VI (which just sends a VISA command "*IDN?") gives me a time out error (0XBFF0015) or a device/resource not present error ( 0XBFFF0011). Attached is a screenshot of the VI.
Any ideas why?
Thanks.
PS: I went through the process to create the VISA-USB driver, but that has some other issue, but I am trying to understand why this occurs. This device also has a GPIB port and when I use a USB-GPIB adapter, it works very well.
Solved!
Go to Solution.
Attachments:
problem_vi.JPG ‏24 KB

SysB1 wrote:
Hi, I have an instrument which has a usb connection. When I connect it to a Windows 7 PC, it automatically picks up the driver and shows up as a "USB Serial Port (COM7) (Manufacturer is FTDI).
When I open up NI MAX, this device shows up as COM7 (ASRL7::INSTR) under "Serial and Parallel". And, when I click on Open VISA Test Panel, and try the "*IDN?" command, it works OK.
However, the VI (which just sends a VISA command "*IDN?") gives me a time out error (0XBFF0015) or a device/resource not present error ( 0XBFFF0011). Attached is a screenshot of the VI.
Any ideas why?
Thanks.
PS: I went through the process to create the VISA-USB driver, but that has some other issue, but I am trying to understand why this occurs. This device also has a GPIB port and when I use a USB-GPIB adapter, it works very well.
Look up the examples that ship with LabVIEW. What you have there isn't quite complete - for serial VISA. While GPIB will work great with what you have, serial VISA requires you to configure your serial port and is a little more complicated to read.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

Control Camera Attibutes through serial port using VISA commands

Hi there,
I'm using a Basler acA2000-340kc camera through an PCIe-1473R FPGA as frame grabber.
I would like to be able to configure the camera through the serial port just in LabView, not using a third-party as Pylon (which I can do now).
According to this forum post
http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/My-Basler-acA2040-180km-NIR-is-not-visible-in...
this is possible just taking the VI posted here
https://decibel.ni.com/content/docs/DOC-5049
and converting from IMAQ to VISA, as RIO frame grabbers cannot use IMAQ. I have been trying to do this by changing the IMAQ vi to their VISA equivalents, but I have no good results.
Does anyone know which are the steps to go from that piece of code to one that can be used to control the camera in my case?
Thanks a lot,

Hi i.popa,
Basler makes the Basler Binary Protocol Library for serial communication with their cameras. If you make sure you're running the serial server section of your FPGA code to keep the serial port open, you should be able to use calls from this library to communicate with your camera. We have a community example with more information on using the Call Library Function Node to call a DLL. This DLL will take care of all the processes needed to write from and read to the registry, so this implementation will probably be similar to the example program you listed above, using calls to this library instead of the IMAQ Serial functions.
Good luck with your application!
Emily C
Applications Engineer
National Instruments

Using a PS/2 keyboard on a Sparc workstation through the serial port

We have recently migrated an application that used to run on a PC, to now run on a Sparc Workstation. This is a SunBlade 1500, running Solaris 8. The application is running in a dedicated console which has a fitted keyboard and trackerball that have PS/2 connectors and cannot be changed.
We need a way of connecting the PS/2 keyboards to the serial ports of the Sparc workstation. We already have a piece of software that will read ascii values from the serial port so we definately want to go through the serial ports.
Can someone please suggest what converters will be required to get the output of the keyboard and trackerball as ascii input to the serial port.

Actually, that's not a bit perverse, at all.
Jonathan's suggestion is a standard method of connecting to a server.
(null cable between the computer serial ports)
... see the Solaris man pages.
man tip
TeraTerm and Hyperterminal are customarily used on a PC running some dialect of Windows.
The 'tip' command is all that's necessary between Solaris systems.
PS/2 is not a serial connection, but is a keyboard/mouse interface 'invented' by IBM when they offered their XT-class PS/2 line of desktop systems, back in the 1980's.
I found this next link by using Google:
http://members.chello.at/theodor.lauppert/computer/ps2/
The smaller DIN ports were more compact than the AT-class keyboard ports and the mouse moved from a serial port to a dedicated mouse port.
Serial communication devices are not keyboards, per se,
and keyboards are not serial communication devices.
You need other hardware in between to translate what the human being sends, and another computer is a common method to accomplish that translation.
Having said all that ...
Since you cannot change the dedicated console hardware,
I suggest you go to the manufacturer of that console equipment
and have them suggest some sort of serial-to-serial interface lash-up.

How do I process serial port strings as bits

In response to my commands, my instrument is sending bytes to my serial
port. In one instance, 2 bytes are received. I want to treat these 2 bytes
as a group of 16 bits.
The VISA and Compatibility Serial functions return these bytes from the
serial port to Labview clearly labelled a "string".
Everything I can find in the way of Labview functions and .vis don't want to
do bit twiddling, bit swapping, and bit dropping, with "string" data.
I thought "hex string to number" could be used here, but I can't find a way.
The 2 Bytes in question can be represented as hex, but the data are not the
ASCII codes for the hex representation of a binary number, they are the
binary number. This "hex string to number" seems to want ASCII c
odes.
You can feed a hex number typed into a "control" box wired into "hex string
to number" and you get a meaningful number. You can feed the 2 bytes from
the serial port into an "indicator" set to read in hex and you get a hex
number that is a correct representation. But that is Labview handing them
around to itself. I need to get my "hands" on them.
I can't feed those same bytes that show up as a correct hex representation
in an indicator into the "hex string to number" or anything else, so far,
and get a number that is useful for further processing.
I thought "variant to data", but I can't find enough reference material to
understand how to use it. A boolean array seems like a bit of a weird
approach, so I thought I'd ask before I looked into that.
I'm used to dealing directly with binary numbers on the processor stack, I
call them whatever I want, and turn them into anything I feel like.
I'm sure I'm staring the solution in the face, but I can't find any way to
persuade
Labview to treat this "string" data as 16 bits.
I've got the 16 bits, which is better than not having them, but I don't have
much hair left.

duh, well I finally discovered the "Unflatten from String" function. A guy
just feeds in the bytes he's collected from his serial port that Labview
thinks are a "string", and out come lovely little unsigned 16 bit numbers,
or whatever other type of number he wants to turn the bytes into. And there
are great little bit twiddlers available after that, like "swap bytes", and
you can mask out bits with the logic operators, why this is fun. There's
nothing like being a moron...... fly me to the moon...................
"David Lewis" wrote in message
news:[email protected]..
> The two bytes would come from a serial port read.vi in Labview, classed as
a
> string. For instance, D3 and 02. The output wou
ld swap the two bytes,
i.e.
> to 02 and D3, consider the two swapped bytes as 16 bits, drop the six most
> significant bits, and output the ten bits that are left as an integer
> classed by Labview as some kind of number, not a string.
>
> Your example StringToBits_Converter.vi I found on the ni.com site
> unfortunately gives an error message and refuses to open on my system
saying
> it comes from a newer version of Labview 6 than I am running. Mine says
> 6.0.1b3. Thank you very much anyway.
>
> "FightOnSCTrojan" wrote in message
> news:[email protected]..
> > In another words, you want to create a VI in which the input is 2
> > strings (i.e. AB) and the output is the converted array bits (e.g.
> > 1010101010101010)?
>
>

"Example on reading combined signals from a serial port and separating them for display purposes". I am a beginner in Labview and would appreciate if anyone help with that

I am working on a wireless vital sign monitor. I have 3 signals; heart rate and temperature. I filter and amplify the signals before converting them into digital form. I then pass them via MAX232 before passing them to RS232 serial cable.
I am therefore working on a program to receive the combined signal and separate them.
I have come across serial read and write examples on ni.com but am looking for one where I can actually separate combined signals and display them separately.

Reading the serial port will give you a string. How you divide the channels depends on how the data was formatted before it was sent over the serial channel.
If you are designing the instrument, as it seems from your query, then you can set up any form you wish. If your data is always floating point numeric, you could use space or tab characters to separate data words. You could use and XML format. If the instrument is provided by a vendor, contact them for the protocol.
If tabs are used between words and returns between sets of readings, the resutlant string can be interpretted by the Spreadsheet String to Array function in LV.
Things to avoid are characters often used by serial communications systems as control characters. Carraige returns are
often used as command terminators by serial protocols, but may also be used by the port.
Lynn

Help with reading information coming from a software into LabVIEW through Serial port

Hi,
I am new to LabVIEW and also an amateur in using RS232 for communication. I have this software that has these icons like speed increase/decrease, elevation up/down, start/stop. Now, when I click these buttons on the software, they perform the appropriate functions. For example, if I press start button, the signal must go through a serial COM port into LabVIEW to start the machine. How do I do that? How do I find what format the code word is when I press a button on the software? And how to decode the information to read whether the button pushed is start etc...? Any help would be appreciated.
V
I may not be perfect, but I'm all I got!

That information would be in the programming manual for the device you're controlling. Unless you have a device that has no documentation or you cannot get the documentation that's the first place you should look. If you cannot get the documentation at all then you've got some reverse-engineering to do. To do this you will either need a serial port sniffer (a hardware device), or you can try to use a software-based port capturing program. On Windows PortMon is the most prevalent. This will show you how the port was configured (baud rate, stop bits, etc). Warning: the information is technical.
As far as how to get it running in LabVIEW, you should take a look at the serial port communication examples that ship with LabVIEW. The most problems occur in figuring out how to (a) terminate a write command, and (b) determining when to stop reading. For (a) this is typically done by appending a carriage return or linefeed to the command. This is device dependent. For (b) this is usually done by the byte stream ending with a character like a linefeed. Again, this is device-dependent.
You may also want to peruse this KB article: Serial Instrument Control Tutorial. There are also lots of tutorial on the internet for basic tutorials on serial port communication.

Esc Command to serial Port

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