I'm trying the ZETI interface on a RFD8500 reader. I connect through a terminal, and most commands work as intended. However, the readbarcode command (which is just mentioned in the docs, without any description), when issued, immediately returns empty result, eg Status: OK, BarcodeType: , Barcode:. How is the command supposed to be used?? Can ZETI read barcodes at all?
Do you have the device with both barcode and rfid reader?
I'd suggest to try first switching from RFID mode to barcode mode by issuing a ZETI command, then if the command still doesn't work I guess it's not supported.
Related
I am trying to create a screen like function that would be used in terminal but in a macOS application where the user can send and receive data to a /dev/cu.usbmodem*.
*I am doing this in a macOS application and not a Command Line tool because I need to be able to access cloudKit easily.
I haven't found much of any info on this? IDK if it matters but I could code c, c++, or Swift file if that makes this possible.
Is this a possibility?*
I've tried to use the SerialSample program on Apple's Developer site but haven't been able to get the data back that would receive in a terminal screen. It does connect to the usbmodem and at the correct baud rate but the data is incorrect. This is most likely an error in my usage so I will also listen to suggestions for that method if it's the only way to achieve my above goal.
I have firmware installed on an Arduino DUE from a different mac, it is designed to interface with a Matlab-based application. It has been tested and known to work. I am attempting to modify the firmware from the mac in my office, but I ran into a snag after installing the Arduino IDE.
First, I cannot get the Arduino Serial Monitor to interact with the DUE. I have tried multiple times, it worked once but I have not managed to make it work since. No errors are reported.
Second, I cannot get the screen terminal command to interact with the DUE either. No errors are reported.
Third, if I simply use text pipes in the terminal (e.g., echo 'status' > /dev/cu.usbmodem1421 or head -20 /dev/cu.usbmodem1421 &) I get appropriate responses from the DUE.
Fourth, the Matlab application can interact with the DUE just as designed.
Note that this is the native USB port in the DUE, no serial adapters (with their driver weirdnesses) are involved. I have not tried to download new code to the DUE as the firmware works as it is as long as we use macs (it is just that I need to modify it so that it can work with the much-slower ports in a Windows PC).
I need to be able to debug the code I am modifying, and for that I need to be able to interact via a terminal, any terminal. Any ideas of where to look?
UPDATE: I noticed that the code was not waiting for USB to be ready. So I added
while(!WiredSerial){
digitalWrite(PIN_LED, HIGH);
delay(125);
digitalWrite(PIN_LED, LOW);
delay(125);
}
After this change the DUE waits for the terminal to be opened and the terminals display the initialization text without a hitch. After that the behavior is the same as reported before.
Never mind.
I was certain that I had already checked this before posting. As a matter of fact, I am sure that it is the first thing I checked, something else must have changed in the interim.
The code was expecting a newline character before it sent anything back while the terminals were just sending a carriage return.
I would like to make my own "PDF printer" using Ghostscript.
Most of solutions I find on the internet involve a 3rd party like Redmon to redirect the PS printer to the Gs executable.
Is there a way to do the same without a 3rd party (other than Gs) ?
Here is my 2 ideas:
Bypass the printing driver and generate Postscript directly by software (From GDI to postscript, using maybe a custom device context like the Metafile device context exist)
Create programmatically a new local port for each document to convert. Maybe using this technique : https://stackoverflow.com/a/1331777/99276
The first solution would be great, but can't find anything about it.
And I am efraid the second is not efficient at all (and detect when the document is fully printed can be tricky)
Update: I used print apis to print in a temp file (the print is synchronous) and then convert the PS file with Gs
Firstly; note that the Windows printing system has been redesigned in Windows Vista and beyond. While the old system still works in WIndows 7 and 8, I am unsure of exactly how usable it is in Windows 10. In Windows 10 everything goes via XPS, and I think (could be wrong) that PostScript is generated by going via XPS first.
Your first idea doesn't sound plausible to me. How can you have a printer (and allow your application to print to it) if you don't have a printer driver ? Even if you could do so, why would you create PostScript from GDI just to send it to Ghostscript and have it create PDF ? It would be far more reasonable to create PDF directly.
In the second case I don't see how adding a new local port would help you at all. Ports are simply where the output of the printer driver is directed. What a Port Monitor (RedMon is a Port Monitor) does is redirect the data stream sent to the port, and 'do something' with it. In the case of Ghostscript + RedMon the 'something' is create a PDF file.
I'm unclear why you don't want to use RedMon, given that you are apparently happy with using Ghostscript. However, if you really don't want to do that then write your own Port Monitor. The process is documented in the Windows Device Driver Development Kit and isn't especially hard. If you get stuck you can even look at the RedMon code as a guide. For example, see here
I have a little project at work, but I'm stuck in my tracks at the moment. We have quite a few Motorola MC1000 hand held barcode scanners at work, doing nothing at the moment, and I want to get them working again for stock takes and what not.
Now, these were pre-installed with a program called MCA, which is a simple barcode scanner and quantity program, which I'm not sure where it saves this information (maybe in memory), but I am unable to get the data from just connecting the device via USB.
On the program, there is a section called "send data" which then outputs data via COM1 port. I have managed to intercept the old program we used to read the barcodes (there is no way to export from this old program), so I need something new, where I can export barcode, quantity via CSV.
Using serialmon, I have found that I can read the barcode, plus some extra confirmations? then the quantity, plus more confirmations, then the next barcode.
Now I need to know if there is a program out there already that can connect to the com1 port, and then read/respond to the device to download all the barcodes and quantities and then export this to a csv, or even if a simple command prompt bat file could do this?
After some testing earlier, I know the device needs to receive an ack in some way as it times out without this (I could manually do this by sending %0 on a regular basis).
Thanks in advance.
I'm trying to push a rails app to my remote Heroku repository from a MacBook Pro using the Bash Terminal.
The remote repository address contains numeric characters which are stripped out as soon as I copy/paste "git#heroku.com:app-name-[numbers].git". If I try to type the numbers in manually, the comp just beeps.
Really stuck on this one!
You've got a terminal setup problem. First thing to try is simply to close down the terminal and restart; that'll be a fresh session.
If that doesn't work, carefully type the following
stty sane^J
or
^Jreset^J
to set it to something normal.
It sounds as if you're getting characters echoed at least, so that may be easy. The ^J characters are LINEFEED, which is the actual ASCII character used for newline in UNIX-based systems.