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| ==In-Depth: Smart Containers==
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| ===Need===
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| Question: Is there enough flour and sugar at home to make a cake for your friend's birthday tomorrow? Or do you need to stop at the store on your way home?
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|
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| ===Concept===
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| Containers for pantry bulk items that relay content levels to smart phone app in real time.
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|
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| ===Equipment===
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| * [[Arduino]]
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| * Sharp GP2D120XJ00F Analog Distance Sensor 4-30cm
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| * Container
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| * Computer
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|
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| ===Prototype===
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| (coming soon)
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|
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| ===Code===
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| ====Arduino====
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| <source lang="java">
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| int sensePin = 1; // infrared sensor to analog pin
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| int value; // value coming from the sensor
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|
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| void setup() {
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| Serial.begin(9600); // start the serial port
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| }
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|
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| void loop() {
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| int value = analogRead(sensePin); // current value of the sensor
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| byte scaledVal = map(value, 0, 600, 0, 255); // rescale to send as one byte
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| Serial.write(scaledVal); //print the distance
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| delay(100); // arbitrary wait time
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| }
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| </source>
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|
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| ====Processing====
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| <source lang="java">
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| Serial myPort; // variable for the serial
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| import processing.serial.*; // reads information coming in through the server via Arduino
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| int incomingVal; // incoming number value
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| int r; // example
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| int b; // example
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| int q; // example
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| int o; // example
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|
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| void setup(){
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| size(255,255); // visualization window size
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| myPort = new Serial(this,"/dev/tty.usbmodem411",9600); // my Arduino port
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| }
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| void draw(){
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| background(0); // background black for visualization
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| while(myPort.available() > 0){
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| incomingVal = myPort.read(); // while new data coming in from Arduino, store in variable
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| }
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| float reVal =map(incomingVal, 51, 255, 0, 255); // rescale the incoming value to the depth of the container
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| fill(reVal); // fill the visualization with the rescaled incoming value
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| rect(0,height - reVal,width,height); // draws rectangle of the incoming value
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| println("Pasta:" +(reVal)+ " Rice:" + r+ " Bulgar:" + b+ " Quinoa:" + q+ " Oats:" + o ); // incoming value to be seen in console
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| PrintWriter output = createWriter("data/data.tsv"); // send info to external file
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| output.println("Pasta:" +(reVal)+ " Rice:" + r+ " Bulgar:" + b+ " Quinoa:" + q+ " Oats:" + o ); // directs which information to be written to new file
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| output.flush(); // write the info
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| }
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| </source>
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|
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| ====PHP====
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| (Uploads data to web)
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| <source lang="php">
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| <?php
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| $file_handle = fopen("data.tsv", "r");
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| while (!feof($file_handle)) {
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| $line = fgets($file_handle);
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| echo $line;
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| }
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| fclose($file_handle);
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| ?>
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| </source>
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| ===References===
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| [http://www.sparkfun.com/datasheets/Sensors/Infrared/GP2D120XJ00F_SS.pdf Reference for Sharp GP2D120XJ00F Analog Distance Sensor 4-30cm] <br>
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| [http://luckylarry.co.uk/arduino-projects/arduino-using-a-sharp-ir-sensor-for-distance-calculation/ Arduino – Using a Sharp IR Sensor for Distance Calculation] <br>
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| [http://www.ibm.com/developerworks/library/os-php-readfiles/ The Right Way to Read Files with PHP]
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