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.
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);
}
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).
Here to used amChart for Tank Level data visualization.
HTML code for Multiple tanks, referf below.
<!-- Styles -->
<style>
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>