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Pass data from PHP form to Python Script - Publish Python results to a PHP page

djstrattos

I am implementing a RPi based Home Automation project where RPi is connected to a Motor Control circuit. The circuit, based on RPi input, drives an AC Motor either Forward or Backwards, so that I can close/open my Window Shades.

 

I have implemented the whole project and wrote a Python Script that get's raw input from keyboard (via SSH to the RPi) and successfully Opens or Closes the shades.

 

I want now to convert the console script so that it communicates with a PHP page on the RPi and based on user's input to act accordingly.

 

As a first version I want to create a PHP input form and pass values of two form variables, direction & duration to two corresponding Python values. The result of the Python script should be submiteb back to the web server and shown to the user's browser.

 

What is the best/easiest way to pass values from PHP to Python and vice versa?

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  • 0

    You can also use Python with cgi interface on your web server.

     

    You just need to look where is the cgi directory on your webserver - by default in apache it's cgi-bin - and put there an executable Python script  using Python's cgitb library.

     

    As example:

     

    #!/usr/bin/env python

import cgitb

cgitb.enable()
form = cgi.FieldStorage()

if "direction" not in form or "duration" not in form:
    print "<H1>Form</H1>"
    print "<form method='post' action='/cgi-bin/this-script.py'>"
    print "Direction <input type='text' name='direction'><br>"
    print "Duration <input type='text' name='duration'><br>"
    print "<input type='submit'>"
    print "</form>"
    return

direction =  form["direction"].value
duration =  form["duration"].value

# Continue your script from here
# For output use Python's print to print HTML to the web server's standar output
#....

  • 0 in reply to iagorubio

    Good day Iago,

     

    Your reply was really helpful and pushed me to the correct direction.

    I faced some difficulties though which I overtook.

    I am currently working on a detailed blog post about how I implemented my project and when ready I will post it as a reply to this thread.

  • 0 in reply to djstrattos

    Hi Strattos;

    I am building a solar power system for my house.  That is an excuse to put a Home Control System on-line so I can monitor and control from my Domain at Fatcow.com.  You mentioned that you will publish your solution at your site.  Would you please e-mail me when you have that?  I would be glad to share my development as well.  I am using a Raspberry Pi with a Gert board.  My first pass will monitor voltages and currents in my solar system and wish to control inverter on/off and later I would like to add my security system monitor and control.  My e-mail is dbasberg@comcast.net.  My name is Doug Basberg.  I am an electrical engineer (retired).  I am just learning PHP, CGI, PERL, and Python, so your info will be of major help.

    Thanks, Doug

Reply
  • 0 in reply to djstrattos

    Hi Strattos;

    I am building a solar power system for my house.  That is an excuse to put a Home Control System on-line so I can monitor and control from my Domain at Fatcow.com.  You mentioned that you will publish your solution at your site.  Would you please e-mail me when you have that?  I would be glad to share my development as well.  I am using a Raspberry Pi with a Gert board.  My first pass will monitor voltages and currents in my solar system and wish to control inverter on/off and later I would like to add my security system monitor and control.  My e-mail is dbasberg@comcast.net.  My name is Doug Basberg.  I am an electrical engineer (retired).  I am just learning PHP, CGI, PERL, and Python, so your info will be of major help.

    Thanks, Doug

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