Category Archives: Processing

Mr. Data Converter

Mr. Data Converter is your friend. It’s a conversion tool to take tab or comma delimited data and convert it to a variety of formats: XML, JSON, ActionScript, PHP, you name it. Mighty handy if you have to take stuff … Continue reading

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Blog Housekeeping

I’m making some changes to this blog. I’ve been unhappy about the fact that all the code is static, not the code I use every day. Instead, I want a nice code repository, so whatever I write on my machine … Continue reading

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Reading data from a uLog logger, saving to a file

Here’s a Processing sketch that takes data from Sparkfun’s uLog datalogger via a serial port, and saves the results to a file. To use this, you’ll need: uLog datalogger with some data on it USB-to-serial adaptor; there are many types … Continue reading

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Traceroute scraper in Processing

There are many web-based interfaces to traceroute available, including a nice list at traceroute.org.  Here’s a Processing sketch that retrieves the raw HTML from one of them and separates the traceroute lines into time taken, hop IP, and hop name. … Continue reading

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Ball Drop Game

Here’s a variation on the networked pong server from Making Things Talk..  This version is cooperative rather than competitive.  Multiple clients have to keep the ball from hitting the ground.  There are five balls dropped each game.

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Chat Server in Processing

Here’s a basic chat server written in Processing.  It’s a bit more complex than the basic test server.  This server keeps track of all the clients who log into it in an ArrayList.  Using an ArrayList is useful when you … Continue reading

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A Tale of Two Pongs

When I start learning a new  platform, I have a simple rule: If you don’t know what to do with it, make pong. What I love about pong is that it’s a simple rule set, easy to understand, and implementable … Continue reading

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RFID to Web Interface

This tutorial introduces a Processing interface sketch provides a GUI for the command-line interface written into the Arduino RFID example. You should read that tutorial first. The sketch shown here also allows you to upload tags it reads to O’Reilly’s … Continue reading

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Arduino-based RFID reader

This tutorial shows how to make an Arduino-based RFID reader that reads Mifare tags and stores them in EEPROM. It is a modification of Alex Zivanovic‘s code on Tinker.it. Thanks to Alex and Massimo Banzi for the reference. Once you’ve … Continue reading

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Writing to Mifare RFID tags

Mifare RFID tags, like other RFID tags, contain a serial number that can be read using an RFID reader, but they also have a limited amount of memory space that you can write data to, and read back from.  This … Continue reading

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