How To Check and Use Serial Ports Under Linux last updated January 28, 2010 in Categories CentOS. Irq, linux box, linux serial port, linux serial port communication, linux serial port console, linux serial port monitor, modem, networking program, null modems. Read data form serial port on windows with php. Ask Question. PHP Roomba Serial Port Communication. Reading COM (Serial Modem) in PHP. How to transfer data to a serial port? Serial Ports Linux vs Windows. Hot Network Questions Why did Hank Pym choose Scott Lang? This is a step-by-step guide to using the serial port from a program running under Linux. The serial communication does not group transmitted data into packets. I'm using a serial port on MONO and Linux with async/await pattern, on the serial port base stream. Php serial-port hyperterminal. Newest serial-port. May 26, 2011  Have installed Puppy Linux 5.2 to a Presario F600 laptop. Not live CD, but full install. All went well. All seems to work. Except for connecting to. Dio_tcsetattr (PHP 4 >= 4.3.0, PHP 5 serial port.

1. Linux Usb Serial Port
2. Linux Serial Port Communication
3. Linux Serial Port Read

I try to read serial port on Linux platform using PHP.
But I cant read any data. When I try to read using .net, this time I can read.

I use 'php_serial.class.php' class for serial port operations. You can read this class from this link :
here

My code is like this :

the line 'print_r(' (size '.strlen($read). ' ) ');' always return zero. What is the reason why I cant read data from serial port?

3 Answers

I am sure you have rsolved this by now, but here is my 2c worth.

As to Install it, use these steps below: • After everything has been plugged in turn the laptop and Epson Stylus Photo 1270 on. Epson stylus photo printers.

You read the serial port twice. Once to check if there is data and then again when there is data. In my experience, reading it once clears the buffer and thus reading it again will yield an empty result.

Just do not read it the second time

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Had the same problem. I needed two options set using stty -isig -icanon once they were set the script read no problem.

Hello this is REALLY old but I am currently (still am) working on this, I got the bytes back correctly (remove ord() to read as a string btw).

The reason it is coming through as zero is because of the infinite loop, even if you send something nothing is being returned (so it would seem) Though using your code I managed to get things returned as strings.

I actually entered data the device side into the console..this then returned me what i entered into the device, it appears you would need to fork the process in order to do it 100% your way. The reason it works sometimes is because if you enter a command which returns a few lines it will most likely get some of them.

use screen to connect to the device and then just type random things and hit enter.. you will see it appear on your php output.

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I am building an online POS and trying to establish low level communication with an Epson tm-t88iv thermal printer. there is no direct printing of files, only hexadecimals or ascii can be sent to the hardware in a specific format for it to print. all of this done in a linux enviroment (both ubuntu 13.10 and 12.04).

Now the problem is that I can't establish communication with the printer. I have tried using Jzebra and other java to javascript libraries but with no luck, so I changed to a more familiar environment and tried using the php serial class with a status check code but nothing happens.

which returns an empty string. Also the printer is not receiving the hexadecimals (it is set on a hex-dump state, to print every hex it receives).

Linux Usb Serial Port

I am not sure even if its a coding or hardware problem. I tried installing cutecom to talk with serial port but I don't get any answers either. I also tried doing some stty commands directly from shell but got nothing either.

If someone can please shed a light on why this is happening or if he has any similar experience, it would be great.

thanks!

p.d: i am connecting using a prolific pl2303 serial to usb cable and its correctly installed as far as i am aware.

Linux Serial Port Communication

Linux Serial Port Read

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