Merge pull request #13 from dwyl/init

#12 monitoring decibels and notifying user

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+DS_Store

README.md

@@ -1,2 +1,29 @@
 # iot-decibel-meter
-A decibel meter built with a raspberry pi
+A decibel meter built with johnny-five
+
+The eventual aim is to get the decibel meter running just on the raspberry pi. However as we are newbies and did not want to have to solder on an ADC converter, we have started off using an arduino and running the johnny-five script on the raspberry pi.
+
+## You will need:
+- a positive mental attitude :heart: :smile: :heart:
+- a laptop or a raspberry pi :cake: with node installed
+- an arduino
+- a sparkfun sound detector (with envelope readings)
+- a breadboard :bread:
+- some male-male wires :boy: :boy:
+- USB A to B cable
+
+#### Optional:
+- an 8 x 8 Matrix (we have MAX7219)
+- LCD screen (we have the LCD 1602 module) and potentiometer (10k)
+
+## Steps
+- Clone the repository
+- ```npm install```
+- Hook up the sparkfun sound detector. Follow instructions [here](https://learn.sparkfun.com/tutorials/sound-detector-hookup-guide?_ga=2.42092133.1361593521.1505302503-234789299.1505302503#introducing-the-sound-detector)
+On our setup, we have connected the envelope output to A1 and gate output to digital 3 (as well as 5V VCC and gnd). We have left the audio output disconnected because we do not need to use it.
+
+- Connect your matrix. Our output pins are data: 6, clock: 4, cs: 5. Please see hook up instructions [here](http://johnny-five.io/examples/led-matrix)
+- Connect LCD screen. We use pins: [7, 8, 9, 10, 11, 12]. Please see hook up instructions [here](http://johnny-five.io/examples/lcd/)
+- Run ```sudo node sound.js```
+
+You should now see the decibels (roughly) on the lcd screen and the matrix should switch between a :smile: and :disappointed: depending on the volume

package.json

@@ -0,0 +1,30 @@
+{
+  "name": "iot-decibel-meter",
+  "version": "1.0.0",
+  "description": "A decibel meter built with a raspberry pi",
+  "main": "sound.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/dwyl/iot-decibel-meter.git"
+  },
+  "keywords": [
+    "iot",
+    "decibel",
+    "johnny-five",
+    "dwyl",
+    "arduino",
+    "pi"
+  ],
+  "author": "naazy",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/dwyl/iot-decibel-meter/issues"
+  },
+  "homepage": "https://github.com/dwyl/iot-decibel-meter#readme",
+  "dependencies": {
+    "johnny-five": "^0.11.7"
+  }
+}

sound.js

@@ -0,0 +1,84 @@
+var five = require("johnny-five"), board, lcd;
+
+var analog = "A1"
+// var digital = "2";
+
+new five.Board().on("ready", function() {
+
+  var heart = [
+     "01100110",
+     "10011001",
+     "10000001",
+     "10000001",
+     "01000010",
+     "00100100",
+     "00011000",
+     "00000000"
+   ];
+
+   var smile = [
+     "00000000",
+     "00100100",
+    "00000000",
+    "00000000",
+    "10000001",
+    "01000010",
+    "00111100",
+    "00000000"]
+
+    var sad = [
+      "00000000",
+      "00100100",
+     "00000000",
+     "00000000",
+     "00000000",
+     "00111100",
+     "01000010",
+     "10000001"
+     ]
+
+   var matrix = new five.Led.Matrix({
+     pins: {
+       data: 6,
+       clock: 4,
+       cs: 5
+     }
+   });
+
+  var ledRed = new five.Led(0);
+  var ledYellow = new five.Led(1);
+  var ledGreen = new five.Led(2)
+
+  var lcd = new five.LCD({
+    // LCD pin name  RS  EN  DB4 DB5 DB6 DB7
+    // Arduino pin # 7    8   9   10  11  12
+    pins: [7, 8, 9, 10, 11, 12],
+    backlight: 2,
+    rows: 2,
+    cols: 20
+  });
+
+  // // Tell the LCD you will use these characters:
+  lcd.useChar("heart");
+
+  var analogSensor = new five.Sensor({pin:analog,
+    freq: 500
+    });
+
+
+  analogSensor.on("data", function() {
+    // this formula may need work but was inspired by https://forum.arduino.cc/index.php?topic=376308.0
+    var decibels = Math.round(40 + (20 * Math.log10(this.value/40)));
+    console.log('decibels', decibels);
+    if(decibels > 60){
+      matrix.draw(sad);
+      lcd.clear().cursor(0, 0).print(decibels + " Too loud :(");
+
+    } else {
+      matrix.draw(smile);
+      lcd.clear().print(decibels + " :heart:");
+
+    }
+ });
+
+});