You can find the source code for this project here: https://github.com/theanti9/HTTPCoffeePot. Be sure to checkout the Readme.doc for more details.

Special Features

• 15 minute automatic shutoff
• Controlled via HTTP Requests
• Status, start, and stop requests
• Returns JSON meant for AJAX interfaces
• Ready and running LEDs

HTTPCoffeePot can be connected to your arduino with an ethernet shield and attached to the network. It will listen on port 80, like a normal web server, and take several different request URLs to control it. The URLs return JSON with the intention that an AJAX interface will be built over it:

• /status/ – This will return some information about the current status of the coffee pot
• /start/ – This will start the coffee pot assuming that it is currently ready to be started and not started already
• /stop/ – This will turn off the coffee pot

Currently the process will work like this:

1. Put in coffee grounds/filter/water
2. Press ready button to enter coffee pot into ready state
3. When coffee is desired, send /start/ request
4. Wait for coffee to finish
5. Send manual /stop/ request OR wait for timed automatic shut off to take place after 15 minutes

I have a very simple coffee maker which is really only a switch. The modifications I made to the pot were to cut the power inside of it between the wall and the switch on the pot and place a relay in between. The relay is then activated by the Arduino board when sent the /start/ request.

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We want to send a big THANK YOU! to Mars Brown from New Orleans for sending us these awesome vinyl stickers.

(Biped robot pictured below if you havent’ seen it, it’s really awesome!)

Anyway, I stumbled on this article on digikey’s web site that goes into further detail, but I wanted to share this nice little chart they have in the article.  It really sums up cost vs range vs throughput vs robustness.  I found it useful, thought someone else might also.  Enjoy.

Oh and here’s some of the stuff you’ve been missing!

GPS speedo, keepon, old parts, more old parts, dip pic32, and first glimpse at the cake o tron!

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So, while playing around with the Animoog app, if you go into the setup menu there is a selection under ‘Refresh MIDI input(s)’ where  you can select ‘Off’ or ‘Network Session 1′.  This intrigued me!  Apparently you can use MIDI over the ‘Network’.  After some Googling I was still unclear on how to get this setup, so I thought I’d just tell everyone how I did it so you can get to making some cool tunes yourself.

I’m assuming your PC has iTunes installed and you have the Bonjour service that comes with it.  It should work without it but you lose the auto-discovery.  OK, so first thing you’re going to need is the Animoog app on your iPad.  Once that is installed, you’re going to need rtpMIDI which is available for free here.  (Download link on the top right).  I’m using Windows 7 64 bit for reference.  Once you download the rtpMIDI, unzip it and execute the .msi file to install it.  There is a better tutorial for installing rtpMIDI here so I won’t re-iterate everything.  The TL;DR version is Install, click Next, Next, Next, agree to anything that pops up, and done.

After the rtpMIDI is installed, run rtpMIDI from the start menu.  Click the + under ‘My Sessions’ and choose a new name or leave it as default.

Next highlight the (only) session and click the enable box on the right.  Now at this point Bonjour probably hasn’t caught up with you yet to display your iPad in the Directory box like mine.  If it does, click connect.  If it doesn’t click the + under Directory and type in the IP address of your iPad followed by :5004.  eg.  ’192.168.5.104:5004′ which is the case with mine.  You can get the WIFI IP address of your iPad by going to Settings ->General->Network->Wi-Fi->(Your Wi-Fi access point’s name) and you’ll see ‘IP Address’.  It’s usually something like 192.168.1.100 or so.

After adding an item in the Directory, highlight it and click connect.  If successfull it should show up in the ‘Participants window’.  Leave this application running.

OK, still with me?  Good.  Next, run Animoog, click on the top right where it says ‘Settings’, then on the left under ‘Refresh MIDI input(s)’ select ‘Network Session 1′.

At this point I’m going to presume that most software that uses MIDI output on  your PC will work, however I did not try them.  I’m going to use Fruity Loops Studio 9.

Once you fire up Fruity Loops, start with a fresh setup.  Goto Options->MIDI settings.  On the top you should see something similar to my screenshot.  The name of your ‘Session’ you used in rtpMIDI.  Highlight that MIDI Device, click Send Master Sync (so you can control BPM from FLStudio) and set the Port Number to 0.  Close this dialog.

Next, goto Channels->Add one->MIDI out.  On the channel settings, make sure you set the Channel to ’1′ and the Port to ’0′.

At this point you should be able to click the little virtual keyboard and hear it play on your iPad.

If this works, then you are all set up.  If not then either you missed a step or I forgot to mention the step (hah!).

You can start making your patterns with notes and hear them play back on the iPad.  You still have to setup your preset in Animoog on the iPad, and it doesn’t appear that all the functionality is supported.  Some notes don’t appear to work (things like pitch, etc.)  I presume if you had multiple iPads you could set them all up with different presets and make some really killer music.

And here is a quick little YouTube video showing it working.

Harford Hackerspace is featured in Chapter 15: DIY CNC ROUTER.

You can purchase the book from Amazon.com

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