For our final project we decided to create an accessory to a GPS system that would help a driver park his or her car when faced with a crowded parking lot. We used a PDA and programed it to read directly from the arduino by projecting the exact image that was on our computer screen. We did this to simulate what the GPS system would look like to the driver, a grid showing taken spots and open spots. We also used a program called flash to create the image that was displayed on the PDA. For each parking spot we envisioned using a weight sensor (regular switch) that would detect when a car was parked on it and then would send information to the GPS system (arduino)
Parking Lot Arduino
ARDUINO CODE
This is the website that we downloaded Flash from:
http://memewire.com/reference/Arduino_Flash
/* ------------------------------------------------
* Flash + Arduino LED Tester
* by Jonah Model <jmodel@parsaons.edu>
* modified from ARDUINO CONVERSATION, by beltran berrocal, b@progetto25zero1.com
* ------------------------------------------------ */
int activeLED ; // What LED has Flash requested we turn on? Numbers
2-9, for a total of 8 possible LEDs
int switchState = 0; // What is the current switch state?
int switchState2 = 0;
int switchState3 = 0;
int switchState4 = 0;
int switchState5 = 0;
int lastSwitchState = 0; // Was the switch previously on, or off?
int lastSwitchState2 = 0;
int lastSwitchState3 = 0;
int lastSwitchState4 = 0;
int lastSwitchState5 = 0;
int switchPin = 7; // Which digital i/o pin is setup for the switch?
int switchPin2 = 6;
int switchPin3 = 5;
int switchPin4 = 4;
int switchPin5 = 3;
//----------------------------------------------------------
void setup() {
Serial.begin(19200); //setup serial conversation at 19200 bauds
pinMode(switchPin, INPUT); // sets the switch pin as input
pinMode(switchPin2, INPUT);
pinMode(switchPin3, INPUT);
pinMode(switchPin4, INPUT);
pinMode(switchPin5, INPUT);
for (int i=2; i<=9; i++) {
pinMode(i, OUTPUT); // sets the digital pins 2-9 as output
}
}
void loop () {
//------------------------------------------------------------------------ SWITCH
LOGIC
// get the current state of the switch from our board
switchState = digitalRead(switchPin);
// if the switch has changed states, then let Flash know about it
if (switchState != lastSwitchState) {
if (switchState == 1){
sendStringToFlash("switchoff");
}
else if (switchState == 0){
sendStringToFlash("switchon");
}
}
lastSwitchState = switchState;
switchState2 = digitalRead(switchPin2);
if (switchState != lastSwitchState2) {
if (switchState2 == 1) {
sendStringToFlash("switch2off");
}
else if (switchState2 == 0){
sendStringToFlash("switch2on");
}
}
// now store the state for later comparison
lastSwitchState2 = switchState2;
switchState3 = digitalRead(switchPin3);
if (switchState !=lastSwitchState3) {
if (switchState3 == 1) {
sendStringToFlash("switch3off");
}
else if (switchState3 == 0){
sendStringToFlash("switch3on");
}
}
lastSwitchState3 = switchState3;
switchState4 = digitalRead(switchPin4);
if (switchState !=lastSwitchState4) {
if (switchState4 == 1) {
sendStringToFlash("switch4off");
}
else if (switchState4 == 0){
sendStringToFlash("switch4on");
}
}
lastSwitchState4 = switchState4;
switchState5 = digitalRead(switchPin5);
if (switchState !=lastSwitchState5) {
if (switchState5 == 1) {
sendStringToFlash("switch5off");
}
else if (switchState5 == 0){
sendStringToFlash("switch5on");
}
}
lastSwitchState5 = switchState5;
//------------------------------------------------------------------------ LED LOGIC
// checks if a serial message has arrived to the board
if(Serial.available() > 0) {
//must be a request to light up an LED
//activeLED should be a number 2-9, but in binary it will come in as 50-57
activeLED = Serial.read();
}
if(activeLED >= 50 && activeLED <= 57) {
//a valid LED signal has been received from Flash
// convert the byte to an int - getting ready for digitalWrite()
int outputPort = activeLED-48;
Serial.print("Requesting LED port:");
Serial.println(outputPort);
if(outputPort >= 2 && outputPort <= 9) {
// turns all the LEDs OFF
for (int i=2; i<=10; i++) {
digitalWrite(i,LOW);
}
// then turns your selected LED ON
digitalWrite(outputPort, HIGH);
}
// when we're done, default the activeLED to nothing
activeLED = 0;
}
else if (activeLED) {
Serial.print("Requesting invalid LED port:");
Serial.println(activeLED,BYTE);
}
//slows down the visualization: each sentence will be emitted every .5 seconds
delay(50);
}
//----------------------------------------------------------
/*send to flash
* inspired by D.Mellis printString function. it simply adds the byte(0) at the end
* needed by the XMLSocket to know that the transmission is over.
* read the XMLSocket Actionscript Class documentation for more details
*/
void sendStringToFlash (char *s) {
while (*s) {
printByte(*s++);
}
printByte(0); //notify the XMLSocket that the comunication is over
}
//------------------------------------------------------------------------ Basic
Arduino
import Arduino;
var port:Number = 5339; // What socket port are we configured to use?
// See the net_port entries from serproxy.cfg
// Create a custom object from Flash's XMLSocket
var a:Arduino = new Arduino(port);
//------------------------------------------------------------------------ Listeners
// You can trigger custom actions by adding listners to the Arduino object. For
example, you can setup your
// ActionScript code to run a setup function when Flash successfully connects to the
socket listener
aListener = new Object();
aListener.onConnect = function() {
setupBoard();
}
aListener.onReceiveData = function(evtObj:Object){
//Store the received data in a string
var str = evtObj.data
trace("Arduino says -- " + str);
//Tests for a particular message from Arduino, and acts accordingly
if (str == "switchoff") {
_root.park.gotoAndStop(1);
}
else if (str == "switchon") {
_root.park.gotoAndStop(2);
}
if (str == "switch2off") {
_root.park2.gotoAndStop(1);
}
else if (str == "switch2on") {
_root.park2.gotoAndStop(2);
}
if (str == "switch3off") {
_root.park3.gotoAndStop(1);
}
else if (str == "switch3on") {
_root.park3.gotoAndStop(2);
}
if (str == "switch4off") {
_root.park4.gotoAndStop(1);
}
else if (str == "switch4on") {
_root.park4.gotoAndStop(2);
}
if (str == "switch5off") {
_root.park5.gotoAndStop(1);
}
else if (str == "switch5on") {
_root.park5.gotoAndStop(2);
}
}
// Binds your custom listeners to the Arduino object (a)
a.addEventListener("onConnect",aListener);
a.addEventListener("onReceiveData",aListener);
//------------------------------------------------------------------------ That's all!
function setupBoard() {
trace("Connection established. Now setting up LEDs...");
// Each physical LED gets a virtual copy in Flash
for (var i=2;i<=9;i++) {
// Associates a pin with each movieclip
var mc:MovieClip = _root["led"+i];
// Stores the digital i/o pin number for later use
mc.pin = i.toString();
var owner = this;
mc.onPress = function() {
// Send the pin data to Arduino, telling it what pin to turn on
owner.a.send(this.pin);
// Turn all virtual LEDs OFF
for (var i=2; i<=10; i++) {
_root["led"+i].gotoAndStop(1);
}
// Now turn the selected virtual LED ON
_root["led"+this.pin].gotoAndStop(2);
}
}
}
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