Serial COM port access in PHP Serial port access in PHP with Windows (XP and higher). Is not as easy as it should be.
Each solution has its limitations. Here are some ideas. Fopen With fopen/fread/fgets/fputs you can treat the serial port as a file $device = 'COM8'; exec('mode $device BAUD=115200 PARITY=n DATA=8 STOP=1 xon=off octs=off rts=on'); $comport = fopen($device, 'wb+'); fputs($comport,'test'.chr(22).chr(252)); fclose($comport); Unfortunately COM10 and above do not work with Windows. The php serial extension by thebyteworks is a commercial solution working that also copes with COM10+.
Installation is a bit difficult though: You must modify the httpd.conf of the Apache server and switch to PHP-CGI mode. The required extension dll is dependent on the PHP version (only tested up to 5.3.0). The trial version has several seconds of delay or additional output 'TRIAL'. Full functionality costs about $30.
Gorilla PHPMake SerialPort. The PHP extension for communicate other device via serial-port(COM). This module is able to run on POSIX system and Windows.
Shell_exec and set (DOS command) $x=shell_exec('set /p x='hello' $lt;nul $gt>. COM11'); Will transfer 'hello' to COM11. Healthpointe 2 0 Programme.
Unfortunately this is limited to ASCII text characters. Shell_exec and copy (DOS command) First you create the binary file, then transfer the file to COM11. Be aware that you need to set data & parity first. 8 bits of data are needed for binary safe files! $x=shell_exec('mode COM11 PARITY=N data=8 stop=1 xon=off'); $x=shell_exec('copy test. Douglas Farr Sustainable Urbanism Pdf Printer. bin. COM11'); But this was unreliant too.
That's why I've written and compiled a univeral tool for serial port access that can be called by PHP via the shell extension. My own C++ workaround Structure: comxs.exe (string port, no of bytes to read as hex, command as hex values) Example from shell: comxs.exe COM11 10 FE FE 00 E0 03 FD will write the sequence (fe fe 00 e0 03 fd) to COM11 and then listen until 10 bytes are received.
In PHP you can call the tool like: $x=shell_exec('comxs. Hp Touchpad Webos Doctor 3.0.2 more. exe $comport $readbytes $command'); $x will contain (as a written string): 'fe fe 00 e0 03 fd fe fe e0 00 03 66 10 20 14 00 fd' (This is a ) This is the C++ source.
Coments are closed