We have tried this method and managed to get it to work, but not without problems. AMP stands for Apache-MySQL-PHP, the ‘W’ is for Windows, and together they form an all-singing, all-dancing web server. The traditional way of getting this done is by installing a so-called “AMP” or “WAMP” package. If not, the browser will simply show the PHP code making up the page instead of the page itself. Also, you need a web server to feed the PHP webpage to a browser. If this is a PHP script, then the computer must be able to execute PHP scripts. #PHP SERIAL PORT WINDOWS SERIAL#Oops, web server needed…ĭoing this solves the serial port opening and closing problem and the data loss resulting from it, but it requires a script to run in the background. $numbers = array($id1=>$value1,$id2=>$value2) įigure 2: This time a Python script produces a dynamic HTML file (as can be seen from the browser’s address bar). Expected format: "$,id1,value1,id2,value2,CRLF" Split data in fields separated by ','. Read one line from the file, then close it. Listing 1: A PHP script that reads data from the serial port and writes it to a file named "data.txt". #PHP SERIAL PORT WINDOWS UPDATE#Process 1: A script to continuously read the serial port and update a data file that is imported by the PHP webpage, see Listing 1. A solution to this is to split the process in two subprocesses: Furthermore, some Arduino-like systems may reset when the serial port is opened, making the setup useless. Data received outside this window is lost. And even if it did, it would mean that every time the browser requests the (latest version of the) page, the script would have to open the serial port, get some data and close the port again. This is the point where things become complicated because PHP doesn’t natively support serial ports. The PHP file then could also contain a script to read the data from the serial port. It is also possible to put the refresh tag in a PHP file instead of an HTML file and the browser will do the same thing. If we rewrite the page every ten seconds and put fresh serial data into it, then the browser will show it too. See the free download below this article. If we create a web page that includes this tag and point the browser to it, the latter will keep reloading it every ten seconds (the timeout can, of course, be another value). (In case your browser does not support this tag, it can be replaced by a piece of JavaScript. This tag tells the browser to reload the page containing the tag every ten seconds.
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