add lcd

README.md

@@ -7,6 +7,7 @@ All the demos write with CoffeeScript
 
  * Multiple LEDs
  * Temperature sensor(LM 35)
+ * LCD
 
 
 ## How to run the code

dust_sensor/dust-sensor.coffee

@@ -0,0 +1,35 @@
+#  JST Pin 1 (Black Wire)  => Arduino GND
+#  JST Pin 3 (Red wire)    => Arduino 5VDC
+#JST Pin 4 (Yellow wire) => Arduino Digital Pin 8
+#*/
+#
+#int pin = 8;
+#unsigned long duration;
+#unsigned long starttime;
+#unsigned long sampletime_ms = 30000;//sampe 30s ;
+#unsigned long lowpulseoccupancy = 0;
+#float ratio = 0;
+#float concentration = 0;
+#void setup() {
+#  Serial.begin(9600);
+#  pinMode(8,INPUT);
+#  starttime = millis();//get the current time;
+#}
+#
+#void loop() {
+#  duration = pulseIn(pin, LOW);
+#  lowpulseoccupancy = lowpulseoccupancy+duration;
+#
+#  if ((millis()-starttime) > sampletime_ms)//if the sampel time == 30s
+#  {
+#    ratio = lowpulseoccupancy/(sampletime_ms*10.0);  // Integer percentage 0=>100
+#concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // using spec sheet curve
+#Serial.print(lowpulseoccupancy);
+#Serial.print(",");
+#Serial.print(ratio);
+#Serial.print(",");
+#Serial.println(concentration);
+#lowpulseoccupancy = 0;
+#starttime = millis();
+#}
+#}

lcd/lcd.coffee

@@ -0,0 +1,23 @@
+five = require 'johnny-five'
+board = new five.Board()
+
+board.on 'ready', ()->
+  lcd = new five.LCD {
+  #LCD pin name  RS  EN  DB4 DB5 DB6 DB7
+    pins: [10, 11, 1, 2, 3, 4]
+  }
+  lcd.on 'ready', ()->
+    lcd.useChar("check");
+    lcd.useChar("heart");
+    lcd.useChar("duck");
+
+    lcd.clear().print("Junv");
+    lcd.cursor(1, 0);
+
+    lcd.print("I :heart: johnny-five");
+    return
+
+  this.repl.inject {
+    lcd: lcd
+  }
+  return

temperature/temperature.coffee

@@ -2,12 +2,15 @@ five = require 'johnny-five'
 
 five.Board().on 'ready', ()->
   sensor = new five.Sensor {
-    pin: 'A0',
-    freq: 200
+    pin: 'A1',
+    freq: 2000
   }
 
   sensor.on 'data', ()->
-    voltage = this.value * 0.004882814
-    celsius = (voltage - 0.5) * 100
+#    celsius = this.value / 9.31
+#    celsius = (voltage-0.3) * 100
+#    celsius = 5.0 * this.value * 100.0/1024.0
+    celsius = (val + 1) * 0.0048828125 * 1000
+    console.log this.value
     fahrenheit = celsius * (9 / 5) + 32
     console.log "#{celsius}°C", "#{fahrenheit}°F"