Introduction: Full Python Web Interface Kit for PhidgetSBC3
The PhidgetSBC3 board is a full functional Single Board Computer, running Debain Linux. It is similar to the raspberry Pi, but has 8 analog sensor inputs and 8 digital inputs and 8 digital outputs. It ships with a webserver and web application to configure the SBC, but the default application cannot read analog sensors or digital inputs and can not set digital outputs.
This Instructable will guide you on how to make your web configuration a full functional interface kit on the SBCor in other words, after following this, you will be able to read sensor values, digital input/output states and set digital output states.
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Step 1: Things You Will Need
Step 2: Prior Knowledge
Make sure you went trough the SBC3 user guide at http://www.phidgets.com/docs/1073_User_Guide
A good understanding of Linux an the Python Language will also assist you to understand why you do certain things, but I hope this tutorial will enable people without any programing experience or linux experience to still create a web base GUI to control the Phidgets SBC3.
Important linux Knowledge:
Make sure you can SSH into the SBC
The following article assisted me allot, and some of the code is used in my project
Step 3: Pre Pairing the PhidgetSBC3
Go into the web site of the SBC
In System, Packages, make sure you selected the complete Debain repository
Under Network, Settings, make sure you enabled the SSH server.
Under Phidgets, Webservice, make sure the webservice (This is not the web server on port 80) is running. This webservice is the communication system that is used by the SBC. My example use no password and port 5001
SSH into the SBC with putty on windows or remoter (iPad) (By default you are the root user, use the password you have used to log in to the SBC3 web page). SSH is covered on page 21 of the SBC3 user guide (1073 user guide)
to make sure your system is up to date (using the web interface to do this is possible, but sometimes failing)
Install unzip and wget by running
apt-get install wget apt-get install unzip
Step 4: Installing Python and Phidgets Python
Read trough the Python programing guide http://www.phidgets.com/docs/Language_-_Python. You may skip the windows and mac section, but read the linux sesion
SSH into the SBC and run
apt-get install python
This will install python2.7 (currently the default) from the Debain repository. Do not use Python 3. Python 3 has some problems with the Phidgets libraries. Python 1 will probably work.
download the PhidgetsPython with wget. SSH into the SBC and run
The downloaded file (currently PhidgetsPython_188.8.131.5250109.zip) will be in the root directory by default (otherwise use cd command to navigate to the file)
(or use whatever version that was downloaded)
Navigate to your PhidgetsPython directory (created by the previous unzip command)
python setup.py install
This will install the PhidgetsPython library.
Step 5: Creating the Python Scripts
Nvigate to your cgi-bin of the webserver (cd /var/www/cgi-bin)
Download the file labeled ifk.zip (named FRK5B8XI6QD0F26.zip) into your cgi-bin using wget or any other method. Rename the file to ifk.zip using the Linux mv command
mv FRK5B8XI6QD0F26.zip ifk.zip
unzip it using unzip.
The directory /var/www/cgi-bin/ifk will now be created.
Now, make sure all the files in your /var/www/cgi-bin/ifk is executable by running
chmod 777 -R /var/www/cgi-bin/ifk/
Step 6: Testing
Use your PC, mac, android, iOS browser and run http://(SBC domain or ip)/cgi-bin/ifk/WebInterfaceKit.py and play around.