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Thread: insert data from com port into textbox php

  1. #1
    Join Date
    May 2007
    Posts
    10

    insert data from com port into textbox php

    I read where this is an easy task but to a newbe, it isn't that easy. I have a scale attached to computer with RS232. I need a php script to read the weight into a text box.

    I found the following:

    include "php_serial.class.php";
    $serial = new phpSerial;
    $serial->deviceSet("COM1");
    $serial->confBaudRate(2400);
    $serial->confParity("none");
    $serial->confCharacterLength(8);
    $serial->confStopBits(1);
    $serial->confFlowControl("none");
    $serial->deviceOpen();
    $read = $serial->readPort();
    $serial->deviceClose();
    $serial->confBaudRate(2400);
    // etc...

    But how do I echo the data?

  2. #2
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,335
    From your code, it looks like $read should contain the data from the port.

    Try a var_export() of it to see what data it contains and how it's structured, e.g.:
    PHP Code:
    echo "<pre>".var_export($readtrue)."</pre>"
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  3. #3
    Join Date
    May 2007
    Posts
    10
    Tried that...again, didn't work. I know my computer can read the com port 1.

  4. #4
    Join Date
    May 2007
    Posts
    10
    So I tried this:

    PHP Code:

    error_reporting
    (E_ALL);

    $fp fopen('COM1''r+');

    if(!
    fp){
     echo 
    "Port not accessible";
    } else {
    echo 
    "Port COM1  opened.";
    }

    $output "mode COM1: BAUD=1200 PARITY=Even data=7 stop=1 Xon=off  ";

    $buffer fgets($fp);

    echo 
    "Read: $buffer"
    Port is open but no $buffer and no errors.

  5. #5
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,335
    Do you need to fput() your output first? (I'm by no means a COM port expert -- haven't touched that stuff in a bunch of years. )
    "Well done....Consciousness to sarcasm in five seconds!" ~ Terry Pratchett, Night Watch

    How to Ask Questions the Smart Way (not affiliated with this site, but well worth reading)

    My Blog
    cwrBlog: simple, no-database PHP blogging framework

  6. #6
    Join Date
    May 2007
    Posts
    10
    Not sure what you mean?

  7. #7
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,335
    You assign a string to the variable $output, but you don't actually do anything with it. I thought maybe you meant to output that string to the COM port, in which case I believe that could be done via fputs() or fwrite() (fputs is just an alias of fwrite).

    Or I could be completely wrong.
    "Well done....Consciousness to sarcasm in five seconds!" ~ Terry Pratchett, Night Watch

    How to Ask Questions the Smart Way (not affiliated with this site, but well worth reading)

    My Blog
    cwrBlog: simple, no-database PHP blogging framework

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