Reporting Rasp Pi data on a Node.js web server
Reading values from sensors connected to Raspberry Pi (Rasp Pi) GPIO pins and displaying the results on the command line is satisfying, but being able to access your sensors remotely is where things start getting useful. The best way to do that is to use a tried and tested medium, the web, and the way to do that is by using Node.js [1].
Node.js is not just for big corporate projects. In fact, Node.js (or more specifically, the node executable supplied in Node.js installations) is, at its simplest, just a JavaScript interpreter. That's it. It lets you write scripts in JavaScript and then it runs them, just as you would run a Bash, Python, or Perl script.
For example, you can make the following code in Listing 1 executable (chmod a+x countdown.js) and run it from the command line.
[...]
Buy this article as PDF
Pages: 8
(incl. VAT)
Buy Raspberry Pi Geek
US / Canada
UK / Australia
Related content
-
Monitoring Raspberry Pi temperatures
Retrofitting a Raspberry Pi with a cooling element does not cost much; however, does the Rasp Pi really need one?
-
Using a temperature and humidity sensor to monitor a terrarium
An Arduino sensor, a Raspberry Pi, and a Python program help a budding naturalist keep tabs on the conditions in his snake's terrarium.
-
Monitoring software for Raspberry Pi
Keep an eye on your Raspberry Pi-based server with these nifty monitoring applications.
-
Automated plant watering with Arduino
House plants are fairly self-sufficient, but they do need certain care from people to survive. With a few Arduino sensors and a little programming, you can take the guesswork out of watering your plants.
-
Building a Raspberry Pi greenhouse
A greenhouse environment has to be just right. The temperature can't climb too high or sink too low, and the plants need water. Why not put your Raspberry Pi to work as the gardener?
