![\"\"](\"https:\/\/nickv.codes\/wp-content\/uploads\/2009\/12\/wiring-diagram3.jpg\" "\\"wiring-diagram\\"")
<\/a><\/p>\nOpen Sound Control:<\/h4>\n
If you’ve never heard of Open Sound Control I recommend that you head over to the website<\/a> to get a little background on it. Basically it’s an open standard that will allow us to send information over a standard network to our target device. You may be asking why use OSC for lighting? Don’t we just have to convert it back to DMX again to make it useful?<\/p>\n The reason OSC was chosen is that there is a bunch of OSC apps for the iPhone. Also it’s well documented with a lot being done in the developer community (check links at the end of this article).<\/p>\n DMX is the protocol that most lighting systems use today. It’s quite a old protocol but seems to work for most applications. I won’t go into depth here about the technical details of it. All you need to know is that we’ll be receiving our messages as OSC and using a simple function in our Arduino sketch to convert it to DMX. If you’d like to learn more about DMX check out this page<\/a>.<\/p>\n First a list of things we’ll need:<\/p>\n The Ethernet Shield is not entirely mandatory as you could communicate through serial to processing but I won’t be covering that in this tutorial. \u00a0My method will give you a standalone device that will communicate to your lights without the need for a computer.<\/p>\n Here’s the code<\/a> we need to load up on our Arduino. You’ll have to remember to change your network settings. On my particular network I use the address 192.168.100.206. Also make sure to set the ‘alphaCh’ variable to reflect your lights alpha channel.<\/p>\n You’ll notice the OSC and the DMX libraries that are being loaded.\u00a0Recotana<\/a> has developed an OSC library for the arduino. I’ve modified the code slightly to allow the use of the OSC messages as variables without the trailing ‘\/’. You can make the modification yourself by replacing lines 700-711 from the original OSCClass.cpp (v1.0.1) with the code below:<\/p>\n or you can download<\/a> the one I’ve modified and put it in you arduino\/libraries folder. The reason I modified the code is that it greatly simplified my arduino code and allowed me to extract the DMX channel from the OSC message and use it as a variable in my sketch.<\/p>\n You can download the DMX library here<\/a>.<\/p>\n Here’s a photo of the breadboard layout. I basically just used the schematic from the arduino website<\/a>. I’ve just added an led and 220\u03a9 resistor\u00a0on the board to make sure the board is getting power. Those two components are not included on the below schematic. Also ignore the orange wire going to nowhere.<\/p>\nDMX:<\/h4>\n
Getting Started:<\/h4>\n
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Arduino Code:<\/h4>\n
\/\/Added this in to remove the slashes out of final output\r\nif(d!='\/'){\r\n tempAddress[adrCount][adrMesPos]=d;\r\n\r\n if(packetCount>3) {\r\n packetCount=0;\r\n packetPos+=4;\r\n }\r\n\r\n adrMesPos++;\r\n}\r\n}\r\nmessagePos++;\r\npacketCount++;<\/pre>\nThe Circuit:<\/h4>\n