IOT Car Counter

hey everyone, hope doing well. partner , have been working on development of car counter uploads data webpage represent amount of cars in parking lot. unfortunately, both have minimal coding experience , have been learning go along.
our project utilizes ultrasonic distance sensor (uds), led, , arduino yun.
so far, code have:

code: [select]

const int echopin = 7; //assigns receiver of uds output arduino
const int triggerpin = 4; //assigns trigger arduino
const int ledrpin = 13; //assigns led arduino
const float minrange = 14.0;  //assigns minimum range uds considering goodread "off"
const float maxrange = 240.0; //assigns maximum range uds considering goodread "off"

float traveltime; //stores time between when pulse sent trigger pin , received echo pin in units of ms
float distance; //stores distance object in units of cm

int goodread;

void setup() {
  serial.begin(9600); //baud rate @ serial data collected
  pinmode(triggerpin, output);
  pinmode(ledrpin, output);
}

void loop() {
  pinmode(echopin, output);
  delay(10);
  digitalwrite(echopin, 0);
  delay(10);
  pinmode(echopin, input); //resets echo in case of getting "stuck"

  digitalwrite(triggerpin, 0);
  delaymicroseconds(2);
  digitalwrite(triggerpin, 1);
  delaymicroseconds(10);
  digitalwrite(triggerpin, 0);

  traveltime = pulsein(echopin, 1, 13000);
  distance = (traveltime/29.0)/2.0; //distance based on time took sound rebound echo

  if(distance > minrange && distance < maxrange){goodread = 0;
  digitalwrite(ledrpin, 1);
  }
  else{goodread = 1;
  digitalwrite(ledrpin, 0);} //allows led cut on when distance parameters met
 
delay(5);

}

we have been working on development of code counting cars pass through entrance , exit - should not problem now. need know is

• how current number of cars counted show on webpage (vs. maximum number alloted in parking lot).
• if possible embed google maps widget , pin show on arduino's location when maximum number of parking spaces has not been reached car count.

we have no specific interval @ cars must counted, counted every time object passing uds meets distance parameters. server usage, have considered node.js , thingspeak, in scope of things there's no telling more practical use given requirements (and knowledge limitations) of project. neither of have networking experience whatsoever, lot of in area appreciated.

thank time!

where counting anything? see doing turning led on or off if distance in range, or not.

i not see how think can determine if car arriving or car leaving or car driving past or cat wandered by, using 1 ultrasonic sensor.

the values, 14 , 240, in unit of measure? value in distance in unit of measure?

quote

what need know how current number of cars counted show on webpage (vs. maximum number alloted in parking lot).

well, first step explain how (think you) know way car going, based on single distance value. second step use knowledge (magically) increment or decrement count of cars in lot. data "show on web page" when arduino, wearing ethernet shield, acting server, received request web browser, , responded html data containing, among other things, count of cars in lot.

quote

if possible embed google maps widget , pin show on arduino's location when maximum number of parking spaces has not been reached car count.

yes, possible include, in html arduino sends, data enables browser display google maps widget. scale of such map not going fine enough pin-point single parking space not in use, if system knew how many cars in lot. knowing there fewer cars in lot spaces not same knowing there space park, or 1 (or more) of cars not taking more 1 space park in. have hard time, instance, determining vehicle entering towing trailer, , is, therefore, going need use 2 spaces.

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