Hi,
Need guidance on working of Arduino. I am developing an incubator using the following circuit
Here I am using a buck converter of 3 amp rating to reduce voltage to required level for Arduino Uno board and also the ultrasonic humidifier. Everything is just fine until the humidifier starts which is when pin 7 goes high. This pin is not connected any hardware and I have written code to connect pushbuttons which I have ordered online but not yet received. But somehow this pin goes high when pin 8 i.e. ultrasonic humidifier pin goes high. So I wanted to know if there is any internal working I might be overlooking. In the diagram I have't drawn the 12k resistor for each mosfet between gate and source pins however they are present in real circuit. Kindly help me understand the problem here. The following is the code I used -
/*
Incubator for 20 Eggs code by K.N.Ganesh
*/
#include <Arduino.h>
#include <LiquidCrystal_I2C.h>
// Include the libraries:
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Servo.h>
//#include <TimeLib.h>
#define DHTPIN 2
#define FAN 4
#define SERVO 9
#define HUMIDIFIER 8
#define HEATER 12
/*Keys*/
#define MENUSET 7
#define INCRSET 11
#define DECRSET 13
#define EXIT 5
#define DHTTYPE DHT11
float hum = 0;
float temp = 0;
float prevhum = 0;
float prevtemp = 0;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x3F, 16 column and 2 rows
DHT dht(DHTPIN, DHTTYPE);
int day = 0;
unsigned long dayprevMillis = 0;
unsigned long daycurrentMillis = 0;
int hour = 0;
unsigned long hourprevMillis = 0;
unsigned long hourcurrentMillis = 0;
// int angle = 24;
// unsigned long turnerprevmillis = 0;
// unsigned long turnercurrentmillis = 0;
bool ShowMenu = 0;
bool menupressed = 0;
bool menuactive = 0;
bool exitpressed = 0;
int submenuselection = 0;
bool submenuentered = 0;
bool incrpressed = 0;
bool tempmenu = 0;
bool humidmenu = 0;
bool daymenu = 0;
bool decrpressed = 0;
Servo servo;
// Define global variables
unsigned long turnerpreviousMillis = 0;
const unsigned long interval = 200; // Interval for angle changes (in milliseconds)
int angle = -1;
int state = 0;
char value[16]; // for lcd display
void turner() {
unsigned long currentMillis = millis();
if (day <= 18) { // turn egg upto eighteen days
if (hour == 6) {
if (state == 0) {
if (angle == -1) {
angle = 12;
}
if (angle < 48) {
servo.write(angle);
angle++;
turnerpreviousMillis = currentMillis;
}
if (currentMillis - turnerpreviousMillis >= interval) {
state = 1;
}
}
}
if (hour == 12) {
if (state == 1) {
if (angle > 12) {
servo.write(angle);
angle--;
turnerpreviousMillis = currentMillis;
}
if (currentMillis - turnerpreviousMillis >= interval) {
state = 2;
}
}
}
if (hour == 18) {
if (state == 2) {
if (angle > 0) {
servo.write(angle);
angle--;
turnerpreviousMillis = currentMillis;
}
if (currentMillis - turnerpreviousMillis >= interval) {
state = 3;
}
}
}
if (hour == 24) {
if (state == 3) {
if (angle <= 12) {
servo.write(angle);
angle++;
turnerpreviousMillis = currentMillis;
}
if (currentMillis - turnerpreviousMillis >= interval) {
state = 0;
}
}
}
}
}
void pollpins() {
//continuously read menu button
menupressed = digitalRead(MENUSET); // this read depends on speed of microcontrols and speed at which user presses and releases button.
if (menupressed != 0 && menuactive == 1) {
// This condition passed means we are in submenu
submenuentered = 1;
} else if (menupressed != 0) {
menuactive = 1;
MainMenu();
}
incrpressed = digitalRead(INCRSET);
if (incrpressed != 0 && menuactive == 1 && submenuentered == 0) {
// Set curcor position here to show menu item selection
submenuselection = submenuselection + 1;
if (submenuselection == 2) { submenuselection = 0; }
ShowSelectedItem();
} else if (incrpressed != 0 && menuactive == 1 && submenuentered == 1) {
ShowSubMenu(0);
}
decrpressed = digitalRead(DECRSET);
if (decrpressed != 0 && menuactive == 1 && submenuentered == 0) {
// Set curcor position here to show menu item selection
submenuselection = submenuselection - 1;
if (submenuselection == 2) { submenuselection = 0; }
ShowSelectedItem();
} else if (decrpressed != 0 && menuactive == 1 && submenuentered == 1) {
ShowSubMenu(1);
}
exitpressed = digitalRead(EXIT); // this read depends on speed of microcontrols and speed at which user presses and releases button.
if (exitpressed != 0) {
exitpressed = 0;
submenuentered = 0;
menuactive = 0;
submenuselection = 0;
ShowValues();
}
}
void ShowValues() {
hum = dht.readHumidity(); // read humidity
temp = dht.readTemperature(); // read temperature
/*testing code*/
Serial.print("Temp: ");
Serial.println(temp); // print the temperature
// Serial.print((char)223); // print ° character
Serial.println(" C");
/*testing code Ends*/
/*testing code*/
Serial.print("Hum: ");
Serial.println(hum); // print the humidity
Serial.print("%");
/*testing code Ends*/
/*testing code*/
Serial.print("Day: ");
Serial.println(daycounter()); // print the days
/*testing code Ends*/
if (prevhum != hum || prevtemp != temp) {
// check if any reads failed
if (isnan(hum) || isnan(temp)) {
lcd.setCursor(0, 0);
lcd.print("Failed");
} else {
lcd.setCursor(0, 0); // start to print at the first row
lcd.print("Temp: ");
lcd.print(temp); // print the temperature
lcd.print((char)223); // print ° character
lcd.print("C");
// /*testing code*/
// Serial.print("Temp: ");
// Serial.println(temp); // print the temperature
// Serial.print((char)223); // print ° character
// Serial.println("C");
/*testing code Ends*/
lcd.setCursor(0, 1); // start to print at the second row
lcd.print("Hum: ");
lcd.print(hum); // print the humidity
lcd.print("%");
// /*testing code*/
// Serial.print("Hum: ");
// Serial.println(hum); // print the humidity
// Serial.print("%");
/*testing code Ends*/
lcd.setCursor(10, 1); // start to print at the second row
lcd.print("Day: ");
lcd.print(daycounter()); // print the days
/*testing code*/
// Serial.print("Day: ");
// Serial.println(daycounter()); // print the days
/*testing code Ends*/
}
prevhum=hum;
prevtemp=temp;
}
else
{
//Serial.println("No Change");
}
Serial.println("Reached Temperature block");
if (temp > 38.5) {
digitalWrite(HEATER, LOW);
digitalWrite(FAN, LOW);
Serial.println("Heater switched off");
} else if (temp < 37) {
digitalWrite(HEATER, HIGH);
digitalWrite(FAN, HIGH);
Serial.println("Heater switched on");
}
Serial.println("Reached Humidity block");
if (hum < 60 && day <=18) {
digitalWrite(HUMIDIFIER, HIGH);
//digitalWrite(FAN, HIGH);
Serial.println("Fan Switched on");
} else if (hum > 65 && day <= 18) {
digitalWrite(HUMIDIFIER, LOW);
//digitalWrite(FAN, HIGH);
Serial.println("Fan Switched off");
} else if (day > 18 && hum < 70) {
digitalWrite(HUMIDIFIER, HIGH);
//digitalWrite(FAN, HIGH);
Serial.println("Fan Switched on for 19th day");
}
/*TURNER CODE*/
}
void MainMenu() {
// Lcd shows Menu
Serial.begin(9600);
lcd.clear();
lcd.print("Select Setting :");
lcd.setCursor(1,0);
lcd.print(" Temp| Hum| Day");
}
int daycounter() {
daycurrentMillis = millis();
//day = millis();
if (daycurrentMillis - dayprevMillis >= 86400000) {
day++;
dayprevMillis = daycurrentMillis;
// Serial.println(day);
}
return day;
}
int hourcounter() {
hourcurrentMillis = millis();
//day = millis();
if (hourcurrentMillis - hourprevMillis >= 3600000) {
hour++;
hourprevMillis = hourcurrentMillis;
if (hour == 24) { hour = 1; }
// Serial.println(day);
}
return hour;
}
void lcdprint(char *menuname, char *mnushort, char *value) {
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Set ");
lcd.print(menuname);
lcd.print(":");
lcd.setCursor(1, 0);
lcd.print(mnushort);
lcd.print(" - ");
lcd.print(value);
}
void ShowSubMenu(int op) {
if (op == 0) {
if (submenuselection == 0) {
temp = temp + 0.5;
lcdprint("Temperature", "Temp", dtostrf(temp, 2, 1, value));
} else if (submenuselection = 1) {
hum = hum + 0.5;
lcdprint("Humidity", "Hum", dtostrf(hum, 2, 1, value));
} else if (submenuselection = 2) {
day = day + 1;
lcdprint("Days", "Day", dtostrf(day, 2, 0, value));
}
} else if (op == 1) {
if (submenuselection == 0) {
temp = temp - 0.5;
lcdprint("Temperature", "Temp", dtostrf(temp, 2, 1, value));
} else if (submenuselection = 1) {
hum = hum - 0.5;
lcdprint("Humidity", "Hum", dtostrf(hum, 2, 1, value));
} else if (submenuselection = 2) {
day = day - 1;
lcdprint("Days", "Day", dtostrf(day, 2, 0, value));
}
}
}
void ShowSelectedItem() {
if (submenuselection == 0) {
lcd.setCursor(1, 0);
lcd.print('>');
lcd.setCursor(1, 6);
lcd.print(' ');
lcd.setCursor(1, 11);
lcd.print(11, ' ');
} else if (submenuselection == 1) {
lcd.setCursor(1, 0);
lcd.print(' ');
lcd.setCursor(1, 6);
lcd.print('>');
lcd.setCursor(1, 11);
lcd.print(' ');
} else if (submenuselection == 2) {
lcd.setCursor(1, 0);
lcd.print(' ');
lcd.setCursor(1, 6);
lcd.print(' ');
lcd.setCursor(1, 11);
lcd.print('>');
}
}
void setup() {
Serial.begin(9600);
pinMode(MENUSET, INPUT);
pinMode(INCRSET, INPUT);
pinMode(DECRSET, INPUT);
pinMode(EXIT, INPUT);
pinMode(DHTPIN, INPUT);
pinMode(SERVO, OUTPUT);
pinMode(FAN, OUTPUT);
pinMode(HUMIDIFIER, OUTPUT);
pinMode(HEATER, OUTPUT);
dht.begin(); // initialize the sensor
lcd.init(); // initialize the lcd
lcd.backlight(); // open the backlight
lcd.clear();
servo.attach(SERVO);
//Serial.begin(9600);
servo.write(angle);
}
void loop() {
pollpins();
ShowValues();
turner();
}
I even tried asking Chatgpt and it said my code was ok, and I should be checking the electrical connections made.
These are the component I used -
- Servo MG996r
- CPU fan 12v dc
- DHT11 sensor
- 12v Relay module.
- 3 IRLZ44N Mosfets to switch relay, fan and humidifier
- 5v ultrasonic Humidifier 113khz.
- 5200 mah li-ion battery
- MP1584 3amp buck converter.
- 100 watt bulb.
- 1602 LCD with I2C interface.
