ARDUINO DATA LOGGER CODE

You will need to edit this file first to make sure it points towards the preferred location of your highcharts.js files. It is set up in such a way that the minimum recordable light intensity is zero, while the maximum is 1024. For my project I chose to use a very cheap photoresistor, which I rigged up on a small perf board to plug directly into the 5v, gnd, and A0 pins of my Arduino (or more precisely, the headers on the Ethernet shield). You will also need a data source of some sort.

ARDUINO DATA LOGGER CODE

For the more adventurous, it may be possible to adapt my code to achieve the same functionality using a Wifi shield. Other non official Ethernet shields and SD card adapters may also work if they use the same libraries, though I make no guarantees.

Presumably an Arduino Ethernet model will also work fine, though I have not personally tested it. In my case, this is achieved through the use of an Uno with the Ethernet shield. You’ll obviously need an Arduino capable of connecting over Ethernet and storing files on an SD card. To replicate this project, a few things are necessary. This is especially true now that the Ethernet and SD libraries included in 1.0 support opening of multiple files simultaneously amongst other things. Thus the use of Highcharts allows us to create beautiful interactive charts based on data logged by the Arduino using nothing but the Arduino (and your browser, and a public javaScript CDN).Īll of the code below is now conveniently hosted on GitHub ( ) so you no longer need to copy and paste it if you don’t want to. Since the user’s browser does all the heavy lifting, the Arduino only needs to serve the files which is something it is perfectly capable of. It didn’t take long for me to realize that charting with javaScript is very convenient for projects in which the server is limited in it’s capabilities, such as when using an Arduino with the Ethernet shield. Some time back I came across this neat javaScript based library for plotting and graphing called Highcharts JS. If you just want to dive right in, the code is now posted on GitHub: Between the Arduino and the user’s browser, everything is taken care of. It differs from similar projects in that it doesn’t require a separate server or system to collect the data or to run script for the actual plot. What is the Super Graphing Data Logger (SGDL)? It is an Arduino project that integrates data logging and the graphing of this data online using little more than an Arduino with the appropriate shields and sensors.

Arduino data logger