Water Level Controller for Multiple Tanks

Learn here to create Arduino Based Water Level controller with bluetooth. We’ll use the HC SR04 ultrasonic to measure tank level, Bluetooth send water level percentage and Pump motor ON/OFF status data to android application for HTML Java script Tank Gauge display.

Components required

Arduino Nano - 1 no

HC SR04 - 3 no

Bluetooth HC-05 - 1 no

Jumper wires

Circuit diagram

Refer to project Water level controller with Real time data logger for more detail.

https://www.dofbot.com/post/water-level-controller-with-real-time-data-logger-and-bluetooth

Installing arduino Library

Download Ultrasonic library , we need to use this library.

Follow the next steps to install those libraries.

In your Arduino IDE, to install the libraries go to Sketch > Include Library > Add .ZIP library… and select the library you’ve just downloaded.

After installing the required libraries, copy the following code to your Arduino IDE.

Arduino Code:

#include <Ultrasonic.h>

Ultrasonic ultrasonic1(2, 3);

Ultrasonic ultrasonic2(4, 5);

Ultrasonic ultrasonic3(8, 9);

// Tank T1

int T1distance;

int T1Lowlevel = 20; // Tank1 Pump ON - T1Percentage 20% you can change the value as per your need

int T1Highlevel = 70; // Tank 1Pump OFF - T1Percentage 70% you can change the value as per your need

int T1TankHeight = 22; // Tank1 Manually enter Tank height in cm

float T1Percentage,T1Math;

#define T1MOTORPIN 6 // Tank 1 Pump relay

/////

// Tank T2

int T2distance;

int T2Lowlevel = 20; // Tank 2 Pump ON - T1Percentage 20% you can change the value as per your need

int T2Highlevel = 70; // Tank 2 Pump OFF - T1Percentage 70% you can change the value as per your need

int T2TankHeight = 18; // Tank 2 Manually enter Tank height in cm

float T2Percentage,T2Math;

#define T2MOTORPIN 7 // Tank 2 Pump relay

/////

// Tank T3

int T3distance;

int T3Lowlevel = 20; // Tank 3 Pump ON - T1Percentage 20% you can change the value as per your need

int T3Highlevel = 70; // Tank 3 Pump OFF - T1Percentage 70% you can change the value as per your need

int T3TankHeight = 15; // Tank 3 Manually enter Tank height in cm

float T3Percentage,T3Math;

#define T3MOTORPIN 10 // Tank 3 Pump relay

////

String Data;

void setup() {

Serial.begin(9600);

Serial.setTimeout(100);

pinMode(T1MOTORPIN,OUTPUT);// Relay pin as output pin

pinMode(T2MOTORPIN,OUTPUT);// Relay pin as output pin

pinMode(T3MOTORPIN,OUTPUT);// Relay pin as output pin

// digitalWrite(MOTORPIN,LOW); // unslash Start Up Turn off the relay condition

// digitalWrite(MOTORPIN,High); //unslash Start Up Turn ON the relay condition

delay(1000);

}

void loop() {

// Tank 1 loop

T1distance = ultrasonic1.read();

T1Math = T1TankHeight-T1distance;

T1Percentage = (T1Math/T1TankHeight)*100;

if ((T1Percentage >= 0) && (T1Percentage <= 100))

if(T1Percentage <= T1Lowlevel) // Relay ON when reached Low Level point

{digitalWrite(T1MOTORPIN,HIGH);}

if(T1Percentage >= T1Highlevel) // Relay OFF when reached High Level point

{digitalWrite(T1MOTORPIN,LOW);}

// end

// Tank 2 loop

T2distance = ultrasonic2.read();

T2Math = T2TankHeight-T2distance;

T2Percentage = (T2Math/T2TankHeight)*100;

if ((T2Percentage >= 0) && (T2Percentage <= 100))

if(T2Percentage <= T2Lowlevel) // Relay ON when reached Low Level point

{digitalWrite(T2MOTORPIN,HIGH);}

if(T2Percentage >= T2Highlevel) // Relay OFF when reached High Level point

{digitalWrite(T2MOTORPIN,LOW);}

// end

// Tank 3 loop

T3distance = ultrasonic3.read();

T3Math = T3TankHeight-T3distance;

T3Percentage = (T3Math/T3TankHeight)*100;

if ((T3Percentage >= 0) && (T3Percentage <= 100))

if(T3Percentage <= T3Lowlevel) // Relay ON when reached Low Level point

{digitalWrite(T3MOTORPIN,HIGH);}

if(T3Percentage >= T3Highlevel) // Relay OFF when reached High Level point

{digitalWrite(T3MOTORPIN,LOW);}

// end

Data = (String)T1Percentage+":"+(String)T2Percentage+":"+(String)T3Percentage+ ":"+(String)(digitalRead(T1MOTORPIN))+":"+(String)(digitalRead(T2MOTORPIN))+":"+(String)(digitalRead(T3MOTORPIN));

Serial.println(Data);

delay(5000);

}

Subscribe and Download code.

Serial Monitor

After a successful upload, open the Serial Monitor at a baud rate of 9600. Press the “EN/RST” button on the Arduino Uno board and see the Tank percentage and Pump ON/OFF status for each tanks in Serial monitor.

Android Application

First open Mobile application and select Bluetooth image button, after that select Bluetooth HC-05 device to connect and enter Password as mentioned above (0000 or 1234).

Subscribe and Download code.

Here to used amChart for Tank Level data visualization.

https://www.amcharts.com/

HTML code for Multiple tanks, referf below.

<!-- Styles -->

<style>

#chartdiv {

width: 100%;

height: 500px;

}

</style>

<!-- Resources -->

<script src="https://cdn.amcharts.com/lib/4/core.js"></script>

<script src="https://cdn.amcharts.com/lib/4/charts.js"></script>

<script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script>

<!-- Chart code -->

<script>

am4core.ready(function() {

// Themes begin

am4core.useTheme(am4themes_animated);

// Themes end

// Create chart instance

var chart = am4core.create("chartdiv", am4charts.XYChart3D);

chart.titles.create().text = "Crude oil reserves";

// Add data

chart.data = [{

"category": "2018 Q1",

"value1": 30,

"value2": 70

}, {

"category": "2018 Q2",

"value1": 15,

"value2": 85

}, {

"category": "2018 Q3",

"value1": 40,

"value2": 60

}, {

"category": "2018 Q4",

"value1": 55,

"value2": 45

}];

// Create axes

var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());

categoryAxis.dataFields.category = "category";

categoryAxis.renderer.grid.template.location = 0;

categoryAxis.renderer.grid.template.strokeOpacity = 0;

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

valueAxis.renderer.grid.template.strokeOpacity = 0;

valueAxis.min = -10;

valueAxis.max = 110;

valueAxis.strictMinMax = true;

valueAxis.renderer.baseGrid.disabled = true;

valueAxis.renderer.labels.template.adapter.add("text", function(text) {

if ((text > 100) || (text < 0)) {

return "";

}

else {

return text + "%";

}

})

// Create series

var series1 = chart.series.push(new am4charts.ConeSeries());

series1.dataFields.valueY = "value1";

series1.dataFields.categoryX = "category";

series1.columns.template.width = am4core.percent(80);

series1.columns.template.fillOpacity = 0.9;

series1.columns.template.strokeOpacity = 1;

series1.columns.template.strokeWidth = 2;

var series2 = chart.series.push(new am4charts.ConeSeries());

series2.dataFields.valueY = "value2";

series2.dataFields.categoryX = "category";

series2.stacked = true;

series2.columns.template.width = am4core.percent(80);

series2.columns.template.fill = am4core.color("#000");

series2.columns.template.fillOpacity = 0.1;

series2.columns.template.stroke = am4core.color("#000");

series2.columns.template.strokeOpacity = 0.2;

series2.columns.template.strokeWidth = 2;

}); // end am4core.ready()

</script>

<!-- HTML -->

<div id="chartdiv"></div>