Hi there,
I am building a humidity/temperature controlled fan with iris+stepper motor for my basement where humidty is really high. Using Arduino UNO, L298N driver and 28BYJ-48 stepper motor.
In my code I am using temperature sensor to work with not the humidity.
The aim would be when the sensor value (hum) goes up higher than the threshold (32%) then the stepper motor open the iris and starts the ventillation. It keeps in this phase until the humidity goes back under the threshold. If reaches a lower value than 32% it closes the iris and stops the ventillation. This is the concept and this is my code. Is it a good approach or my code is already a crap? Can you advise how to move forward?
#include <AccelStepper.h>
#include "DHT.h"
#define DHTPIN 7
#define DHTTYPE DHT11
AccelStepper stepper; // Defaults to AccelStepper (4 pins) on 2, 3, 4, 5
DHT dht(DHTPIN, DHTTYPE);
//Termometer Icon
byte tempchar1[8] = {B00000, B00001, B00010, B00100, //Row 0, Col 2
B00100, B00100, B00100, B00111,
};
byte tempchar2[8] = {B00111, B00111, B00111, B01111, //Row 1, Col 2
B11111, B11111, B01111, B00011,
};
byte tempchar3[8] = {B00000, B10000, B01011, B00100, //ROW 0, Col 3
B00111, B00100, B00111, B11100,
};
byte tempchar4[8] = {B11111, B11100, B11100, B11110, //Row 1, Col 3
B11111, B11111, B11110, B11000,
};
//Humidity Icon
byte humchar1[8] = {B00000, B00001, B00011, B00011, //Row 0, Col 2
B00111, B01111, B01111, B11111,
};
byte humchar2[8] = {B11111, B11111, B11111, B01111, //Row 1, Col 2
B00011, B00000, B00000, B00000,
};
byte humchar3[8] = {B00000, B10000, B11000, B11000, //ROW 0, Col 3
B11100, B11110, B11110, B11111,
};
byte humchar4[8] = {B11111, B11111, B11111, B11110, //Row 1, Col 3
B11100, B00000, B00000, B00000,
};
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 4);
void setup() {
dht.begin();
lcd.backlight();
lcd.init();
lcd.clear();
Serial.begin(9600);
stepper.setMaxSpeed(200); //Stepper MaxSpeed
stepper.setAcceleration(40); //Stepper Acceleration
stepper.moveTo(2000); //Stepper MaxSteps
}
void dht_lcd() {
lcd.createChar(1, tempchar1);
lcd.createChar(2, tempchar2);
lcd.createChar(3, tempchar3);
lcd.createChar(4, tempchar4);
lcd.setCursor(0, 0);
lcd.write(1);
lcd.setCursor(0, 1);
lcd.write(2);
lcd.setCursor(1, 0);
lcd.write(3);
lcd.setCursor(1, 1);
lcd.write(4);
lcd.setCursor(3, 0);
lcd.print((float)dht.readTemperature());//print the temperature
lcd.print("C");
lcd.createChar(5, humchar1);
lcd.createChar(6, humchar2);
lcd.createChar(7, humchar3);
lcd.createChar(8, humchar4);
lcd.setCursor(11, 0);
lcd.write(5);
lcd.setCursor(11, 1);
lcd.write(6);
lcd.setCursor(12, 0);
lcd.write(7);
lcd.setCursor(12, 1);
lcd.write(8);
lcd.setCursor(14, 0);
lcd.print((float)dht.readHumidity());//print the humidity
lcd.print("%");
delay(500);
lcd.clear();
}
void open() {
stepper.moveTo(2000);
while (stepper.currentPosition() != 1800) // Full speed up to 1800
stepper.run();
stepper.stop(); // Stop as fast as possible: sets new target
stepper.runToPosition();
stepper.stop();
}
void close() {
stepper.moveTo(0);
while (stepper.currentPosition() != 200) // Full speed back to 0
stepper.run();
stepper.stop(); // Stop as fast as possible: sets new target
stepper.runToPosition();
stepper.stop();
}
void loop() {
dht_lcd();
int temp_threshold = 24;
int hum_thershold = 32;
float hum_sens = dht.readHumidity();
float temp_sens = dht.readTemperature();
if (temp_sens >= temp_threshold) {
open();
}
else if ( temp_sens < temp_threshold) {
close();
}
}
