Php Serial Extension Free

5/23/2021admin

You Are Probably Trying To Read When Is No Data On The Serial Port. You Need To Implement JavaScript Code To Call PHP Code That Can Read At Reg..
Every Solution Above Is Either Inefficient Or Too Much Work. You Can Just Use The PHP-DIO Library (dio_fcntl, Dio_open, Dio_read, Dio_write, Dio_s..
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Downloads

PHP (PHP HyperText Preprocessor) is a server side scripting language popular with website developers. Typically PHP is used to generate web pages by interrogating a database and files. However PHP can also be used to control and communicate with other devices.

This article explains how to configure PHP in order to send and receive data over a serial port on a unix system or a windows system.

Prerequisites

PHP installed on your computer
An installed Brainboxes Serial port product

Steps In Brief

Install PHP Direct IO extension
Configure PHP to use the extension
Use PHP file provided in the downloads
Open terminal program at other end of serial connection
Configure PHP file with correct local serial port settings
Go!

In-depth

Install PHP Direct IO

PHP by default does not offer good COM port support however a PHP extension called Direct IO does offers low level access to IO. We will use this extension for serial port communication.

On unix system install the extension using PECL, open a terminal and type:

/mi-unlock-app-for-mac.html. sudo pecl install dio-0.0.7

On windows download the latest php direct io extension dll from: http://pecl.php.net/package/dio. The dll file should be copied into your php_extension folder (often located in ext or libphpext )

Configure PHP to use the extension

Next the php.ini file needs to be updated to tell it to use the extension. To the bottom of the php.ini file add the following.

Unix: extension=dio.so

Windows: extension=php_dio.dll

Restart PHP

Unix: commands vary, on mac for example: sudo apachectl restart

Windows: restart IIS webserver, or WAMP server

Use PHP file provided in the downloads

Download the file about and place it in your web-servers root directory. Navigate to the file the a web browser to confirm that an error is not produced which tells you to install PHP Direct IO.

Open terminal program at other end of serial connection

You Are Probably Trying To Read When Is No Data On The Serial Port. You Need To Implement JavaScript Code To Call PHP Code That Can Read At Reg..

In order to test sending and receiving serial data in PHP, the other end of the serial port should be open. On a windows system we recommend using Putty and on Mac OSX CoolTerm (see this FAQ for more details) to configure a serial for for transmitting and recieving data. We also recommend opening the other side of the serial connection in the terminal initially to confirm that data is definitely able to be sent and received across the connection.

Configure PHP file with correct local serial port settings

The sample script has some settings to be configured at the top, most importantly the port name.

Windows the port name should be 'comX:' (X being the port number assigned name must be lower case and a colon at the end) this can be found by opening Device Manager.

Unix systems the port name is '/dev/cu.usbserial-XXXXXXXXX' where 'X' is a randomly assigned id. To find all the names of Brainboxes serial ports installed on UNIX type ls /dev/cu.usbserial* into the terminal.

Every Solution Above Is Either Inefficient Or Too Much Work. You Can Just Use The PHP-DIO Library (dio_fcntl, Dio_open, Dio_read, Dio_write, Dio_s..

Go!

In a Web Browser open the file, the other end of the serial port should show 'HELLO WORLD!'. Then type into the terminal on the other end of the connection, this will be echoed back onto the web browser window.