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Shishir Ramam
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open sourcing the dadaconf code
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‎Readme.md‎

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# brainy
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A simple node server that interfaces the [muse](http://www.choosemuse.com/) brain sensing band to an [arduino](https://www.arduino.cc/) board.
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Built as part of [dadaconf 0](http://dadaconf.com/)
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Things external to this package.
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1. Connecting node to an arduino board.
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2. Install the muse [developer kit](http://www.choosemuse.com/developer-kit/)
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# How it works
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- The muse connects over bluetooth with it's driver.
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- The driver then transmits signals using [OSC] (http://opensoundcontrol.org/introduction-osc)
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- It needs to be configured to talk to our node.js server (configure the UDP port))
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- Adjust any arduino ports you might want to interface to.
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- Depending on what you are controlling, may you have happy endings!
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‎index.js‎

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var osc = require("osc");
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var ArduinoFirmata = require('arduino-firmata');
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var arduino = new ArduinoFirmata();
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arduino.connect(); // use default arduino
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arduino.connect('/dev/cu.usbserial-A403IN4Y');
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// Create an osc.js UDP Port listening on port 57121.
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var udpPort = new osc.UDPPort({
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localAddress: "0.0.0.0",
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localPort: 5013
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});
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var map = {
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alpha: 9,
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beta: 10,
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theta: 11,
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delta: 12,
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gamma: 13
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}
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var avgs = {
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alpha: 0,
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beta: 0,
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theta: 0,
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delta: 0,
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gamma: 0
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};
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var analog_limit = 11;
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var turnOn = function(band, val) {
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var motor_scale = 2;
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var led_scale = 4;
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var ch = map[band];
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var avg = (val[1] + val[2])/2;
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if(!avg) {
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avg = 0;
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}
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avgs[ch] = avg;
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var motor_intensity = parseInt(avg * motor_scale * 255);
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var led_intensity = parseInt(avg * led_scale * 255);
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avgs['led_intensity'] = led_intensity;
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console.log(JSON.stringify(avgs));
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if (ch <= analog_limit) {
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arduino.analogWrite(ch, motor_intensity, function() {
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console.log('pin ' + ch + ' turned on ' + motor_intensity);
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});
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} else {
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if (motor_intensity === 0) {
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arduino.digitalWrite(ch, false, function() {
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console.log('pin ' + ch + ' turned on');
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});
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} else {
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arduino.digitalWrite(ch, true, function() {
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console.log('pin ' + ch + ' turned on');
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});
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}
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}
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var led_on = 128 < led_intensity;
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arduino.digitalWrite(ch-7, led_on, function() {
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console.log('pin ' + ch-7 + ' turned on');
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});
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}
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// Listen for incoming OSC bundles.
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udpPort.on("message", function (oscBundle) {
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switch(oscBundle.address) {
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case '/muse/elements/alpha_relative': {
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turnOn('alpha', oscBundle.args);
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break;
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}
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case '/muse/elements/beta_relative': {
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turnOn('beta', oscBundle.args);
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break;
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}
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case '/muse/elements/theta_relative': {
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turnOn('theta', oscBundle.args);
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break;
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}
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case '/muse/elements/delta_relative': {
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turnOn('delta', oscBundle.args);
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break;
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}
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case '/muse/elements/gamma_relative': {
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turnOn('gamma', oscBundle.args);
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break;
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}
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}
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});
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// Open the socket.
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udpPort.open();

‎package.json‎

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{
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"name": "brainy",
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"version": "1.0.0",
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"description": "A node module to interface the muse to a arduino",
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"main": "index.js",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"author": "Shishir Ramam",
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"license": "Apache 2",
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"dependencies": {
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"arduino-firmata": "^0.3.2",
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"osc": "^1.1.2"
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}
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}

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