Help me to add a code for dry run protection

ccmani94 · January 29, 2024, 9:03pm

Hi,

i have used a program to Monitor tank water level using ultrasonic sensor with Auto /manual control Feature.

Here i want to include Dry run protection when water is not available in Sump. Can some one help me in adding a code when motor is turned on and if water % is not changing for 3 minutes it should turn off motor.

i have tried many ways its not working.

Attaching my code base code Below.


#define BLYNK_TEMPLATE_ID "TMPL3C4qVNhXf"
#define BLYNK_TEMPLATE_NAME "Tankbolt"
#define BLYNK_AUTH_TOKEN "kDXkVSF9ltjy916IquSLn2iKdgtTWbZh"

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Thina Home";   //WiFi Name
char pass[] = "12345678";   //WiFi Password

//Set Water Level Distance in CM
int emptyTankDistance = 150 ;  //Distance when tank is empty
int fullTankDistance =  40 ;  //Distance when tank is full (must be greater than 25cm)

//Set trigger value in percentage
int triggerPer =   10 ;  //alarm/pump will start when water level drop below triggerPer

#include <Adafruit_SSD1306.h>
#include <ESP8266WiFi.h>        
#include <BlynkSimpleEsp8266.h>
#include <AceButton.h>
using namespace ace_button; 

// Define connections to sensor
#define TRIGPIN    D6  //D6
#define ECHOPIN    D7  //D7
#define wifiLed    16  //D0
#define BuzzerPin  D3  //D3
#define RelayPin   D5  //D5
#define ButtonPin1 3   //RX   //Mode
#define ButtonPin2 10  //SD3  //Relay
#define ButtonPin3 D4  //D4   //STOP Buzzer

//Change the virtual pins according the rooms
#define VPIN_BUTTON_1    V1 
#define VPIN_BUTTON_2    V2
#define VPIN_BUTTON_3    V3 
#define VPIN_BUTTON_4    V4
#define VPIN_BUTTON_5    V5

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

float duration;
float distance;
int   waterLevelPer;
bool  toggleBuzzer = HIGH; //Define to remember the toggle state

bool toggleRelay = false; //Define the toggle state for relay
bool modeFlag = true;
String currMode;

char auth[] = BLYNK_AUTH_TOKEN;

ButtonConfig config1;
AceButton button1(&config1);
ButtonConfig config2;
AceButton button2(&config2);
ButtonConfig config3;
AceButton button3(&config3);

void handleEvent1(AceButton*, uint8_t, uint8_t);
void handleEvent2(AceButton*, uint8_t, uint8_t);
void handleEvent3(AceButton*, uint8_t, uint8_t);

BlynkTimer timer;

void checkBlynkStatus() { // called every 3 seconds by SimpleTimer

  bool isconnected = Blynk.connected();
  if (isconnected == false) {
    //Serial.println("Blynk Not Connected");
    digitalWrite(wifiLed, HIGH);
  }
  if (isconnected == true) {
    digitalWrite(wifiLed, LOW);
    //Serial.println("Blynk Connected");
  }
}

// When App button is pushed - switch the state

BLYNK_WRITE(VPIN_BUTTON_3) {
  modeFlag = param.asInt();
  if(!modeFlag && toggleRelay){
      digitalWrite(RelayPin, LOW);  //turn off the pump
      toggleRelay = false;
    }
    controlBuzzer(500);
    currMode = modeFlag ? "AUTO" : "MANUAL";
}

BLYNK_WRITE(VPIN_BUTTON_4) {
  if(!modeFlag){
    toggleRelay = param.asInt();
    digitalWrite(RelayPin, toggleRelay);
    controlBuzzer(500);
  }
  else{
    Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
  }
}

BLYNK_WRITE(VPIN_BUTTON_5) {
  toggleBuzzer = param.asInt();
  digitalWrite(BuzzerPin, toggleBuzzer);
}

BLYNK_CONNECTED() {
  Blynk.syncVirtual(VPIN_BUTTON_1);
  Blynk.syncVirtual(VPIN_BUTTON_2);

  Blynk.virtualWrite(VPIN_BUTTON_3, modeFlag);
  Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
  Blynk.virtualWrite(VPIN_BUTTON_5, toggleBuzzer); 
}

void displayData(){
  display.clearDisplay();
  display.setTextSize(3);
  display.setCursor(30,0);
  display.print(waterLevelPer);
  display.print(" ");
  display.print("%");
  display.setTextSize(1);
  display.setCursor(20,25);
  display.print(currMode);
  display.setCursor(95,25);
  display.print(toggleRelay ? "ON" : "OFF");
  display.display();
}

void measureDistance(){
  // Set the trigger pin LOW for 2uS
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
 
  // Set the trigger pin HIGH for 20us to send pulse
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(20);
 
  // Return the trigger pin to LOW
  digitalWrite(TRIGPIN, LOW);
 
  // Measure the width of the incoming pulse
  duration = pulseIn(ECHOPIN, HIGH);
 
  // Determine distance from duration
  // Use 343 metres per second as speed of sound
  // Divide by 1000 as we want millimeters
 
  distance = ((duration / 2) * 0.343)/10;

  if (distance > (fullTankDistance - 10)  && distance < emptyTankDistance ){
    waterLevelPer = map((int)distance ,emptyTankDistance, fullTankDistance, 0, 100);
    Blynk.virtualWrite(VPIN_BUTTON_1, waterLevelPer);
    Blynk.virtualWrite(VPIN_BUTTON_2, (String(distance) + " cm"));

    // Print result to serial monitor
//    Serial.print("Distance: ");
//    Serial.print(distance);
//    Serial.println(" cm");

    if (waterLevelPer < triggerPer){
      if(modeFlag){
        if(!toggleRelay){
          controlBuzzer(500);
          digitalWrite(RelayPin, HIGH); //turn on relay
          toggleRelay = true;
          Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
        } 
      }
      else{
        if (toggleBuzzer == HIGH){
          digitalWrite(BuzzerPin, HIGH);
          Serial.println(" BuzzerPin high");
        } 
      }     
    }
    if (distance < fullTankDistance){
      if(modeFlag){
        if(toggleRelay){
          digitalWrite(RelayPin, LOW); //turn off relay
          toggleRelay = false;
          Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
          controlBuzzer(500);
        }
      }
      else{
        if (toggleBuzzer == HIGH){
        digitalWrite(BuzzerPin, HIGH);
        }
      } 
    }
    if (distance > (fullTankDistance + 5) && waterLevelPer > (triggerPer + 5)){
      toggleBuzzer = HIGH;
      Blynk.virtualWrite(VPIN_BUTTON_5, toggleBuzzer);
      digitalWrite(BuzzerPin, LOW);
    }        
  }
  displayData();
  delay(100);
}

void controlBuzzer(int duration){
  digitalWrite(BuzzerPin, HIGH);
  Serial.println(" BuzzerPin HIT");
  delay(duration);
  digitalWrite(BuzzerPin, LOW);
}
 
void setup() {
  // Set up serial monitor
  Serial.begin(9600);
 
  // Set pinmodes for sensor connections
  pinMode(ECHOPIN, INPUT);
  pinMode(TRIGPIN, OUTPUT);
  pinMode(wifiLed, OUTPUT);
  pinMode(RelayPin, OUTPUT);
  pinMode(BuzzerPin, OUTPUT);

  pinMode(ButtonPin1, INPUT_PULLUP);
  pinMode(ButtonPin2, INPUT_PULLUP);
  pinMode(ButtonPin3, INPUT_PULLUP);

  digitalWrite(wifiLed, HIGH);
  digitalWrite(RelayPin, LOW);
  digitalWrite(BuzzerPin, LOW);

  config1.setEventHandler(button1Handler);
  config2.setEventHandler(button2Handler);
  config3.setEventHandler(button3Handler);
  
  button1.init(ButtonPin1);
  button2.init(ButtonPin2);
  button3.init(ButtonPin3);

  currMode = modeFlag ? "AUTO" : "MANUAL";

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(1000);  
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.clearDisplay();

  WiFi.begin(ssid, pass);
  timer.setInterval(2000L, checkBlynkStatus); // check if Blynk server is connected every 2 seconds
  timer.setInterval(1000L,  measureDistance); // measure water level every 1 seconds
  Blynk.config(auth);
  delay(1000);
  
  Blynk.virtualWrite(VPIN_BUTTON_3, modeFlag);
  Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
  Blynk.virtualWrite(VPIN_BUTTON_5, toggleBuzzer);
  
  delay(500);
}
 void loop() {
  
  Blynk.run();
  timer.run(); // Initiates SimpleTimer

  button1.check(); //mode change
  button3.check(); //buzzer reset

  if(!modeFlag){  //if in manual mode
    button2.check();
  }
   
}
void button1Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT1");
  switch (eventType) {
    case AceButton::kEventReleased:
      //Serial.println("kEventReleased");
      if(modeFlag && toggleRelay){
        digitalWrite(RelayPin, LOW);  //turn off the pump
        toggleRelay = false;
        controlBuzzer(500);
      }
      modeFlag = !modeFlag;
      currMode = modeFlag ? "AUTO" : "MANUAL";
      Blynk.virtualWrite(VPIN_BUTTON_3, modeFlag);
      controlBuzzer(200);
      break;
  }
}

void button2Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT2");
  switch (eventType) {
    case AceButton::kEventReleased:
      //Serial.println("kEventReleased");     
      if(toggleRelay){
        digitalWrite(RelayPin, LOW);  //turn off the pump
        toggleRelay = false;
      }
      else{
        digitalWrite(RelayPin, HIGH);  //turn on the pump
        toggleRelay = true;
      }
      Blynk.virtualWrite(VPIN_BUTTON_4, toggleRelay);
      controlBuzzer(500);
      delay(1000);
      break;
  }
}

void button3Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT3");
  switch (eventType) {
    case AceButton::kEventReleased:
      //Serial.println("kEventReleased");
      digitalWrite(BuzzerPin, LOW);
      toggleBuzzer = LOW;
      Blynk.virtualWrite(VPIN_BUTTON_5, toggleBuzzer);
      break;
  }
}

FernandoGarcia · January 29, 2024, 9:10pm

Looks like you haven't created this code.

You are asking for a very basic function to a complex code.

Could be better say the truth.

gilshultz · January 29, 2024, 9:49pm

What is wrong with a float switch?

ccmani94 · January 29, 2024, 10:10pm

what if sump is to long from the Over head tank and the pump controller..

So i have planned to have dry run protection with tank water level

if water level does not changes for 3 minutes it should turn off the motor..

Do you know how to program it

gilshultz · January 29, 2024, 10:22pm

Have you considered a flow switch and timer? Post a simple sketch showing how the mechanical is laid out and include major dimensions.

Paul_KD7HB · January 30, 2024, 1:03am

Look for a float switch, like all other sump pumps, so only water making the float close a switch will allow the pump motor to turn.

ccmani94 · January 30, 2024, 2:38am

i think the below code will workout


{ 
 int percentage = calculatePercentage(); // Your function to calculate the percentage using the ultrasonic sensor 
 if (percentage != previousPercentage)
 { 
 lastChangeTime = millis(); 
 previousPercentage = percentage; 
 }
 if (millis() - lastChangeTime >= 180000)
 { // 180000 milliseconds = 3 minutes stopPump(); 
 } 
} 
 void stopPump()
 { 
 digitalWrite(PUMP_PIN, LOW);
 } 
 int calculatePercentage()
 {

JCA34F · January 30, 2024, 5:30am

Connect a vacuum switch to the pump's inlet port, when the pump is pumping water, the port pressure will be lower than atmospheric, the vacuum switch will keep the pump running. When the sump runs dry the port pressure will go up to near atmospheric, breaking the circuit and stopping the pump.

system · July 28, 2024, 5:31am

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.

Topic		Replies	Views
Water Level Controller Jobs and Paid Consultancy	14	1796	May 6, 2021
Project discussion : water level indicator with auto cut off and purity checker Project Guidance	54	661	January 24, 2024
Arduino Based Water Level indicator for underground tank Project Guidance	9	1109	May 5, 2021
Help in a part of project Project Guidance	13	1373	May 5, 2021
Project Help. assignment Programming Questions	8	463	September 16, 2021

Help me to add a code for dry run protection

Related Topics