Long Range Wireless Water Level Controller Using Arduino and Ultrasonic Sensor

Long range wireless water level controller using arduino and ultrasonic sensor with the following features:

• Wireless long range using nrf24l01 PA.
• Contactless water level measurement using ultrasonic sensor.
• Compatible with variable tank height
• Relay to automatically turn on/off the water pump

Material Required

• Amazon.in
• Arduino Nano: https://amzn.to/3tIm4n7
• NRF24L01+PA+LNA Module (1pc): https://amzn.to/3TOkCtZ
• 2.4 Inch TFT LCD Display: http://amzn.to/2iNWUCi
• Arduino Uno: https://amzn.to/3u1R8yx
• Ultrasonic Sensor: http://amzn.to/2cUi2Em

• Amazon.com
• 2pcs NRF24L01+PA+LNA Module: https://amzn.to/2rI2ms3
• Arduino Nano: https://amzn.to/3XfaLQQ
• 2.4 Inch TFT LCD Display: http://amzn.to/2EYlpn5
• Arduino Uno: http://amzn.to/2CoHDNl Ultrasonic Sensor: https://amzn.to/3XkPXYq

Arduino Library for 2.4 Inch TFT LCD Display

Transmitter Connection

Ultrasonic sensor Trigger Pin = 3

Ultrasonic sensor Echo Pin = 5

Transmitter Code:

#include <SPI.h>  
#include "RF24.h"
#include <NewPing.h>

#define TRIGGER_PIN  3  
#define ECHO_PIN     5  
#define MAX_DISTANCE 80 

RF24 myRadio (A5, 10); //CE, CSN
byte addresses[][6] = {"0"};
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); 
struct package
{
  int distance=1;
};
typedef struct package Package;
Package data;

void setup()
{
  Serial.begin(115200);
  delay(100);
  myRadio.begin();  
  myRadio.setChannel(115); 
  myRadio.setPALevel(RF24_PA_MIN);
  myRadio.setDataRate( RF24_250KBPS ) ; 
  myRadio.openWritingPipe( addresses[0]);
  delay(100);
}

void loop()
{
  myRadio.write(&data, sizeof(data)); 
  data.distance=(sonar.ping_cm());  
      Serial.print("distance: ");
      Serial.print(data.distance);
      Serial.println(" cm");
  delay(10);      
}

Receiver Connection

For LCD

• YP = A1
• XM = A2
• YM = 7
• XP = 6
• LCD_CS = A3
• LCD_CD = A2
• LCD_WR = A1
• LCD_RD = A0
• LCD_RESET = A4

Buzzer pin = A6
Relay pin = A7

Receiver Code:

//EPROM
#include <EEPROM.h>

//LCD
#include <SPFD5408_Adafruit_GFX.h>
#include <SPFD5408_Adafruit_TFTLCD.h>
#include <SPFD5408_TouchScreen.h>
#if defined(__SAM3X8E__)
#undef __FlashStringHelper::F(string_literal)
#define F(string_literal) string_literal
#endif
#define YP A1
#define XM A2
#define YM 7
#define XP 6
#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define LCD_RESET A4
#define BLACK   0x0000
#define BLUE    0x001f
#define WATER    0x07FF
#define DARKBLUE    0xFFD0
#define RED     0xf800
#define GREEN   0x07e0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xffe0
#define WHITE   0xffff
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

//NRF
#include <SPI.h>
#include "RF24.h"
RF24 myRadio (A5, 10); //CE, CSN
struct package
{
  int distance;
};
byte addresses[][6] = {"0"};
typedef struct package Package;
Package data;

int switch1Color = 0;
int switch1Color1 = 0;
int old_distance;
int buzzer = A6; // for buzzer
int relay = A7; // for relay

int height = EEPROM.read(0);
int valve = EEPROM.read(3);
int erase;


void setup()
{
  Serial.begin(115200);
  delay(1000);
  pinMode(relay, OUTPUT);
  pinMode(buzzer, OUTPUT);
  tft.reset();
  tft.begin(0x9341);
  tft.setRotation(2);
  startPage();
  myRadio.begin();
  myRadio.setChannel(115);
  myRadio.setPALevel(RF24_PA_MAX);
  myRadio.setDataRate( RF24_250KBPS ) ;
  myRadio.openReadingPipe(1, addresses[0]);
  myRadio.startListening();
  delay(500);
  erase = 316;
}
void loop()
{
  if ( myRadio.available())
  {
    while (myRadio.available())
    {
      myRadio.read( &data, sizeof(data) );
      Serial.print("distance: ");
      Serial.print(data.distance);
      Serial.print(" cm  ");
      int distance = data.distance;

      int rawData = map(distance, valve, height, 61, 316);
      Serial.print("new data: ");
      Serial.println(rawData);

      if ( rawData > erase)
      {
        tft.fillRect(37, erase, 199, rawData - erase, BLACK);
      }

      if ( rawData < erase)
      {
        tft.fillRect(37, rawData, 199, erase - rawData, CYAN);
      }
      erase = rawData;

      /*tft.fillRect(37, erase, 199, old_distance - distance, BLACK);
        tft.fillRect(37, 316 - distance, 199, distance, CYAN);
        erase = 316 - distance;
        old_distance = distance;*/

    }
  }
  else
  {
    Serial.println("No Data Available...");

  }
  touchUpdate();
}

void startPage()
{
  int x = 3;
  int y = 50;
  int height = EEPROM.read(0);
  int valve = EEPROM.read(3);

  tft.fillScreen(CYAN);
  tft.setTextSize (2);
  tft.setTextColor(BLACK);
  tft.setCursor (55, 6);
  tft.println("WATER LEVEL");
  tft.setCursor (60, 26);
  tft.println("CONTROLLER");

  tft.fillRect(x, y, 234, 200, GREEN);
  tft.drawRect(x, y, 234, 200, BLACK);
  tft.setTextSize (3);

  tft.drawRect(x + 3, y + 5, 228, 66, BLACK);
  tft.setCursor (x + 20, y + 9);
  tft.println("TANK HEIGHT");
  tft.fillRect(x + 76, y + 38, 83, 28, WHITE);
  tft.drawRect(x + 75, y + 37, 85, 30, BLACK);
  tft.setCursor (x + 80, y + 43);
  tft.println(height);
  tft.setCursor (x + 175, y + 43);
  tft.println("+");
  tft.setCursor (x + 45, y + 43);
  tft.println("-");

  tft.drawRect(x + 3, y + 82, 228, 66, BLACK);
  tft.setCursor (x + 10, y + 86);
  tft.println("VALVE HEIGHT");
  tft.fillRect(x + 76, y + 115, 83, 28, WHITE);
  tft.drawRect(x + 75, y + 114, 85, 30, BLACK);
  tft.setCursor (x + 80, y + 120);
  tft.println(valve);
  tft.setCursor (x + 175, y + 120);
  tft.println("+");
  tft.setCursor (x + 45, y + 120);
  tft.println("-");

  tft.fillRect(x + 4, y + 160, 111, 30, WHITE);
  tft.drawRect(x + 4, y + 160, 111, 30, BLACK);
  tft.setCursor (x + 6, y + 165);
  tft.println(" SKIP ");

  tft.fillRect(x + 119, y + 160, 111, 30, WHITE);
  tft.drawRect(x + 119, y + 160, 111, 30, BLACK);
  tft.setCursor (x + 122, y + 165);
  tft.println("UPDATE");
  takeInput();
}

TSPoint takeInput()
{ int x = 3;
  int y = 50;
  int height = EEPROM.read(0);
  int valve = EEPROM.read(3);
L1:
  TSPoint p;
  do
  {
    p = ts.getPoint();
    pinMode(XM, OUTPUT);
    pinMode(YP, OUTPUT);
  }
  while ((p.z < 10 ) || (p.z > 1000));
  if ( (p.x > 660 && p.x < 740) && (p.y > 220 && p.y < 320) )
  {
    // height +
    tft.fillRect(x + 76, y + 38, 83, 28, WHITE);
    tft.setCursor (x + 80, y + 43);
    tft.println(height + 1);
    height = height + 1;
    delay(100);
    goto L1;
  }
  if ( (p.x > 660 && p.x < 740) && (p.y > 620 && p.y < 750) )
  {
    // height -
    tft.fillRect(x + 76, y + 38, 83, 28, WHITE);
    tft.setCursor (x + 80, y + 43);
    tft.println(height - 1);
    height = height - 1;
    delay(100);
    goto L1;
  }
  if ( (p.x > 475 && p.x < 555) && (p.y > 220 && p.y < 320) )
  {
    // valve +
    tft.fillRect(x + 76, y + 115, 83, 28, WHITE);
    tft.setCursor (x + 80, y + 120);
    tft.println(valve + 1);
    valve = valve + 1;
    delay(100);
    goto L1;
  }
  if ( (p.x > 475 && p.x < 5505) && (p.y > 620 && p.y < 750) )
  {
    // valve -
    tft.fillRect(x + 76, y + 115, 83, 28, WHITE);
    tft.setCursor (x + 80, y + 120);
    tft.println(valve - 1);
    valve = valve - 1;
    delay(100);
    goto L1;
  }

  if ( (p.x > 370 && p.x < 440) && (p.y > 500 && p.y < 840) )
  {
    // skip
    homepage();
  }

  else if ( (p.x > 370 && p.x < 440) && (p.y > 125 && p.y < 460) )
  {
    // update
    EEPROM.update(0, height); //Number 7 at the address number 0
    EEPROM.update(3, valve); //Number 50 at the address number 3
    homepage();
  }

  else  if ( (p.x > 120 && p.x < 140) && (p.y > 580 && p.y < 680) )//parameterPage (book logo)
  {
    startPage();
  }
  else  if ( (p.x > 120 && p.x < 140) && (p.y > 730 && p.y < 840) )//homePage
  {
    homepage();
  }

  else goto L1;
  return p;
}

void homepage()
{
  tft.fillRect(0, 0, 240, 320, GREEN);
  tft.fillRect(3, 3, 234, 20, BLACK);
  tft.setTextColor(CYAN);
  tft.setTextSize(2);
  tft.setCursor(55, 6);
  tft.println("WATER LEVEL");

  tft.drawRect(35, 40, 203, 278, BLACK);
  tft.drawRect(36, 40, 201, 277, WHITE); //(x, y, w, h, Colour);
  tft.fillRect(37, 40, 199, 276, BLACK);


  tft.setRotation(1);
  tft.fillRect(11, 1, 95, 29, BLACK);
  tft.fillRect(13, 3, 95, 29, RED);
  tft.drawRect(13, 3, 95, 29, BLACK);

  tft.drawRect(0, 7, 12, 15, BLACK);
  tft.fillRect(0, 8, 12, 13, CYAN);

  tft.drawRect(108, 7, 152, 15, BLACK);
  tft.fillRect(108, 8, 152, 13, WHITE);

  tft.drawRect(260, 7, 15, 35, BLACK);
  tft.drawRect(259, 22, 15, 20, BLACK);
  tft.fillRect(260, 8, 14, 35, WHITE);

  tft.setTextSize (3);
  tft.setTextColor(BLACK);
  tft.setCursor (17, 7);
  tft.println("MOTOR");
  tft.setRotation(2);
}

void touchUpdate()
{
  TSPoint p = ts.getPoint();
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  if (p.z > 10 && p.z < 1000)
  {
    Serial.print("X = "); Serial.print(p.x);
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);
    if ( (p.x > 180 && p.x < 420) && (p.y > 780 && p.y < 870) )
    {
      motorUpdate();
    }
    if ( (p.x > 120 && p.x < 140) && (p.y > 580 && p.y < 680) )//parameterPage (book logo)
    {
      startPage();
    }
    if ( (p.x > 120 && p.x < 140) && (p.y > 730 && p.y < 840) )//homePage
    {
      homepage();
    }
  }
}

void motorUpdate()
{
  if (switch1Color == 0 )
  {
    switch1Color = switch1Color + 1  ;
    tft.setRotation(1);
    tft.fillRect(11, 1, 95, 29, BLACK);
    tft.fillRect(13, 3, 95, 29, GREEN);
    tft.drawRect(13, 3, 95, 29, BLACK);
    tft.fillRect(108, 8, 152, 13, CYAN);
    tft.fillRect(260, 8, 14, 35, CYAN);
    tft.setTextSize (3);
    tft.setTextColor(BLACK);
    tft.setCursor (17, 7);
    tft.println("MOTOR");
    tft.setRotation(2);
    digitalWrite(relay, HIGH);
    delay (200);
  }

  else if (switch1Color == 1)
  {
    switch1Color = switch1Color - 1;
    tft.setRotation(1);
    tft.fillRect(11, 1, 95, 29, BLACK);
    tft.fillRect(13, 3, 95, 29, RED);
    tft.drawRect(13, 3, 95, 29, BLACK);
    tft.fillRect(108, 8, 152, 13, WHITE);
    tft.fillRect(260, 8, 14, 35, WHITE);
    tft.setTextSize (3);
    tft.setTextColor(BLACK);
    tft.setCursor (17, 7);
    tft.println("MOTOR");
    tft.setRotation(2);
    digitalWrite(relay, LOW);
    delay (200);
  }
}