Ferdinand Thomas
Published

Smartap Future of Faucets

An advanced faucet that can close if left open, can monitor the water usage, can control the water flow to manage water consumption at home.

AdvancedFull instructions provided6 hours2,007
Smartap Future of Faucets

Things used in this project

Hardware components

WIZ750SR
WIZnet WIZ750SR
×1
Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
SparkFun Logic Level Converter - Bi-Directional
SparkFun Logic Level Converter - Bi-Directional
×1
Water Flow Meter
×1
3.3V Voltage Regulator(AMS1117-3.3)
×1
Pushbutton switch 12mm
SparkFun Pushbutton switch 12mm
×1
Resistor 10k ohm
Resistor 10k ohm
×1

Software apps and online services

Arduino IDE
Arduino IDE
Wiznet Configuration tool

Story

Read more

Schematics

CIrcuit complete

Wiring at the tap end.

Potential Divider interfacing

Alternate connection for interfacing Wiz750SR with Arduino

Code

Complete Arduino code

Arduino
Upload the code directly to arduino
#include<Servo.h>
#include <avr/pgmspace.h>

#define onswitch 3
#define flowinterrupt 0
#define flowsensor 2

Servo tapservo;

int tapcontrol,duration;
volatile byte tapbutton=LOW;

float calibration=4.5;
volatile byte flowpulse;  //Pulse from flowmeter
float flowRate;
unsigned int flowMilliLitres;
unsigned long totalMilliLitres,threshold;

unsigned long oldTime;

const char PROGMEM webpage1[]="<html>"
"<head>"
" <h2>SMARTAP DATA</h2>"
"  <style>"
"  table, td "
"  {    border: 1px solid black;}"
"  table"
"  {width:100%;}"
"  button"
"  {width: 100%;}"
"  </style>"
"</head>"
"<body>"
"<form action=\"changedata\" method=\"get\" enctype=\"multipart/form-data\" name=\"threshold\" id=\"threshold\" target=\"_self\">"
"<table>"
"  <tr>"
"    <th>Tap state</th>"
"    <td>";
const char PROGMEM webpage2[]="<select>"
"    <option value=\"ON\">ON</option>"
"    <option value=\"OFF\">OFF</option>"
"    </select> "
"  </td>   "
"  </tr>"
"  <tr>"
"    <th>Consumption rate</th>"
"    <td>";
const char PROGMEM webpage3[]="</td>"
"    </tr>"
"    <tr>"
"    <th>Total consumption</th>"
"    <td>";
const char PROGMEM webpage4[]="</td>"
" </tr>"
"    <tr>"
"    <th>Consumption threshold</th>"
"    <td><input type=\"text\" name=\"consthresh\" value='";
const char PROGMEM webpage5[]="' size=\"4\" maxlength=\"3\" />&nbsp;</td></td>"
"    </tr>"
"    <tr>"
"    <th></th>"
"      <td><button type=\"submit\" form=\"threshold\" value=\"Save\">Submit</button></td>"
"    </tr>"
"</table>"
"</form>"
"</body>"
"</html>";

void setup()
{
  Serial.begin(115200);
  duration=5000;
  tapcontrol=250;
  tapbutton=false;
  pinMode(onswitch, INPUT_PULLUP);
  tapservo.attach(9);
  threshold=500;    //500ml threshold

  //waterflow init
  pinMode(flowsensor, INPUT);   //Initialise flow sensor
  digitalWrite(flowsensor, HIGH);
  flowpulse        = 0;
  flowRate          = 0.0;
  flowMilliLitres   = 0;
  totalMilliLitres  = 0;
  oldTime           = 0;
  attachInterrupt(flowinterrupt, pulseCounter, FALLING);
  attachInterrupt(onswitch, tapclick, FALLING);

}
void loop()
{
 serialpeek();    //check if any data is at serial port
}

void serialpeek()  
{
  int i=0;
  char c;
  char serialdata[100];
  String datastring="";
  if (Serial.available())
  {
      while (i<100 && Serial.available())
      {
          c=Serial.read();
          serialdata[i]=c;
          i++;
      }
      serialdata[i]=0;
      datastring=String(serialdata);
     Serial.flush();

    if (datastring.indexOf("/ ")>0) { mainPage();}
    if (datastring.indexOf("threshold")>0) {updateval(serialdata);}

      Serial.flush();
  }
}

void mainPage()
{
  int i;
  byte serbuffer;
  for(i=0;i<strlen_P(webpage1);i++)
  {
    serbuffer=pgm_read_byte_near(webpage1+i);
    Serial.print(serbuffer);
  }
  Serial.print(tapbutton);
  for(i=0;i<strlen_P(webpage2);i++)
  {
    serbuffer=pgm_read_byte_near(webpage2+i);
    Serial.print(serbuffer);
  }
  Serial.print(flowRate);
  for(i=0;i<strlen_P(webpage3);i++)
  {
    serbuffer=pgm_read_byte_near(webpage3+i);
    Serial.print(serbuffer);
  }
  Serial.print(totalMilliLitres);
  for(i=0;i<strlen_P(webpage4);i++)
  {
    serbuffer=pgm_read_byte_near(webpage4+i);
    Serial.print(serbuffer);
  }  
  Serial.print(threshold);
  for(i=0;i<strlen_P(webpage5);i++)
  {
    serbuffer=pgm_read_byte_near(webpage5+i);
    Serial.print(serbuffer);
  }  
}

void updateval(String serialdata)
{
  int a,b,x,y,temp=0;
  String buffertext,parameter[2];
  x=serialdata.indexOf("?");
  y=serialdata.length();
  String pagetext = serialdata.substring(x+1,y);
  for(int i=0;i<2;i++)
  {
    x=temp;
    y=pagetext.indexOf("&",temp);
    buffertext=pagetext.substring(x,y);
    temp=x+1;
    a=buffertext.indexOf("=");
    b=buffertext.length();
    parameter[i]=buffertext.substring(a+1,b);
  }
  if(parameter[0]=="ON")tapclick();
  threshold=parameter[1].toInt();
}

void tapclick()
{
 if( totalMilliLitres<= threshold) 
 {
  tapfunc();
 }
}

void pulseCounter()
{
  flowpulse++;
  if((millis() - oldTime) > 1000)
  {
    detachInterrupt(flowinterrupt);
    flowRate = ((1000.0 / (millis() - oldTime)) * flowpulse) / calibration;
    oldTime = millis();
    flowMilliLitres = (flowRate / 60) * 1000;
    totalMilliLitres += flowMilliLitres;
    flowpulse = 0;
    attachInterrupt(flowinterrupt, pulseCounter, FALLING);
  }
}

void tapfunc()
{
  tapcontrol=0;
  while(digitalRead(onswitch)==HIGH&&tapcontrol<90) //90 degree tap
  {
    tapcontrol+=10;
    tapservo.write(tapcontrol);
    delay(50);
  } 
  delay(duration);
  for(int i=tapcontrol;i>0;i--)   //loop to close the tap with fading effect
  {
    tapservo.write(i);
    delay(30);
  }
}

Webpage mainpage

HTML
This code is broken down in the main code
<html>
<head>
	<h2>SMARTAP DATA</h2>
	<style>
	table, td 
	{    border: 1px solid black;}
	table
	{width:100%;}
	button
	{width: 100%;}
	</style>
</head>
<body>
<form action=\"changedata\" method=\"get\" enctype=\"multipart/form-data\" name=\"threshold\" id=\"threshold\" target=\"_self\">
<table>
	<tr>
    <th>Tap state</th>
    <td>
    	<select>
 		<option value="ON">ON</option>
		<option value="OFF">OFF</option>
		</select> 
	</td>   
 	</tr>
	<tr>
    <th>Consumption rate</th>
    <td>#</td>
   	</tr>
   	<tr>
    <th>Total consumption</th>
    <td>#</td>
	</tr>
   	<tr>
    <th>Consumption threshold</th>
    <td><input type=\"text\" name=\"consthresh\" value='0' size=\"4\" maxlength=\"3\" />&nbsp;</td></td>
  	</tr>
  	<tr>
		<th></th>
  		<td><button type="submit" form="threshold" value="Save">Submit</button></td>
    </tr>
</table>
</form>
</body>
</html>

Credits

Ferdinand Thomas

Ferdinand Thomas

1 project • 0 followers

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