How do I read from a serial port?

[pnberry@gmail.com]

Newbie here,

I've got a digital scale attached to the first serial port of my Linux
OS computer: /dev/ttyS0
How would I set up the serial port for reading data and then how would
I turn that data into a variable that I could use in a PHP program?

Thanks for any help,
Paul

[adlerweb]

Re: How do I read from a serial port?

Hi

If your scale uses the same settings as your OS (speed, etc) it should
be enough to fopen /dev/ttyS0 and use it like a file. Note: You can not
read and write with one socket - in this case you have to use two.

Example:

$string = "foobar\n";
$pointer = fopen("/dev/ttyS0","w");
fwrite ($pointer, $string);
fclose($pointer );

Florian

pnberry@gmail.c om schrieb:

Newbie here,
>
I've got a digital scale attached to the first serial port of my Linux
OS computer: /dev/ttyS0
How would I set up the serial port for reading data and then how would
I turn that data into a variable that I could use in a PHP program?
>
Thanks for any help,
Paul
>