Im lost, my code runs fine but i want to be able to change the dew point with the push of a button.
ive tried eveything i can think of but im lost.
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 11 // what pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);
//DHT dht(DHTPIN, DHTTYPE, 30);
int intakefan = 2; // Intake fan for Humid box and dry box
int humidv = 3; // Valve for humud intake
int dryv = 4; // dry box valve
int exfan = 5; // exhaust fan
int exv = 6; // exhaust valve
int returnfan = 7; // fan to bring air from inside box
int returnv = 8; // return valve, air from inside box
//int lock = 9; // Electric lock
const int buttonPin = 10; // button to reset cycle
int fridge = 13; // relay to fridge 240v
int DHTpower = 12; // constant 5v to DHT11
int buttonState = 0; // variable for reading the pushbutton
float lowDry, highDry;
float lowStore, highStore;
//bool cycle;
LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD address to 0x27 for a 16x2 display
double dewPoint(double celsius, double humidity) {
// (1) Saturation Vapor Pressure = ESGG(T)
double RATIO = 373.15 / (273.15 + celsius);
double RHS = -7.90298 * (RATIO - 1);
RHS += 5.02808 * log10(RATIO);
RHS += -1.3816e-7 * (pow(10, (11.344 * (1 - 1 / RATIO))) - 1);
RHS += 8.1328e-3 * (pow(10, (-3.49149 * (RATIO - 1))) - 1);
RHS += log10(1013.246);
// factor -3 is to adjust units - Vapor Pressure SVP * humidity
double VP = pow(10, RHS - 3) * humidity;
// (2) DEWPOINT = F(Vapor Pressure)
double T = log(VP / 0.61078); // temp var
return (241.88 * T) / (17.558 - T);
}
void setup() {
pinMode(intakefan, OUTPUT);
pinMode(fridge, OUTPUT);
pinMode(humidv, OUTPUT);
pinMode(dryv, OUTPUT);
pinMode(exfan, OUTPUT);
pinMode(exv, OUTPUT);
pinMode(returnfan, OUTPUT);
pinMode(returnv, OUTPUT);
pinMode(DHTpower, OUTPUT);
pinMode(buttonPin, INPUT);
digitalWrite(intakefan, LOW);
digitalWrite(humidv, LOW);
digitalWrite(dryv, LOW);
digitalWrite(exfan, LOW);
digitalWrite(exv, LOW);
digitalWrite(returnfan, LOW);
digitalWrite(returnv, LOW);
digitalWrite(DHTpower, HIGH);
digitalWrite(fridge, LOW);
Serial.begin(9600);
lcd.init(); // Initialize the LCD
lcd.backlight(); // Turn on the backlight
lcd.clear(); // Clear the LCD screen
lcd.setCursor(3, 0);
lcd.print("The Green");
lcd.setCursor(4, 1);
lcd.print("Ninja");
delay(2000); // Display the startup message for 2 seconds
lcd.clear();
dht.begin();
lowStore = 10.5;
highStore = 11.5; // aim for 11
lowDry = 11.5; // Dry aim for 12
highDry = 12.5;
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius
float t = dht.readTemperature();
// Read temperature as Fahrenheit
float f = dht.readTemperature(true);
float currentDew = dewPoint(t, h); // Dew Point for setting pins high
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
lcd.clear();
lcd.print("Failed to read from DHT sensor!");
return;
}
// Compute heat index
// Must send in temp in Fahrenheit!
float hi = dht.computeHeatIndex(f, h);
float hiDegC = dht.convertFtoC(hi);
if (f < 19) {
digitalWrite(fridge, LOW);
}
if (f > 21) {
digitalWrite(fridge, HIGH);
}
if (currentDew > lowDry && (currentDew < highDry)) { // Level to aim for dew point
dewPointOk(t, h);
}
if (currentDew >= highDry) { // High dew point, send to dry box
dewPointHigh(t, h);
}
if (currentDew <= lowDry) { // Dew point low, send to humid box
dewPointLow(t, h);
}
}
void dewPointOk(float t, float h) {
digitalWrite(intakefan, LOW);
digitalWrite(humidv, LOW);
digitalWrite(dryv, LOW);
digitalWrite(exfan, LOW);
digitalWrite(exv, LOW);
digitalWrite(returnfan, LOW);
digitalWrite(returnv, LOW);
lcd.print("Dew point OK");
lcd.setCursor(0, 1);
lcd.print(dewPoint(t, h));
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
lcd.clear();
lcd.print("Temperature");
lcd.setCursor(0, 1);
lcd.print(dht.readTemperature());
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
lcd.clear();
lcd.print("Humidity");
lcd.setCursor(0, 1);
lcd.print(dht.readHumidity());
lcd.setCursor(6, 1);
lcd.print("%");
delay(2000);
}
void dewPointHigh(float t, float h) {
digitalWrite(humidv, LOW);
digitalWrite(dryv, HIGH);
digitalWrite(exv, HIGH);
digitalWrite(returnv, HIGH);
lcd.clear();
lcd.print("Dew Point High");
lcd.setCursor(0, 1);
lcd.print(dewPoint(t, h));
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
lcd.clear();
lcd.print("Temperature");
lcd.setCursor(0, 1);
lcd.print(dht.readTemperature());
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
lcd.clear();
lcd.print("Dry Box On");
lcd.setCursor(0, 1);
lcd.print("Fans On");
digitalWrite(intakefan, HIGH);
digitalWrite(exfan, HIGH);
digitalWrite(returnfan, HIGH);
delay(2000);
lcd.clear();
lcd.print("Humidity");
lcd.setCursor(0, 1);
lcd.print(dht.readHumidity());
lcd.setCursor(6, 1);
lcd.print("%");
delay(2000);
}
void dewPointLow(float t, float h) {
digitalWrite(humidv, HIGH);
digitalWrite(dryv, LOW);
digitalWrite(exv, HIGH);
digitalWrite(returnfan, LOW);
digitalWrite(returnv, LOW);
lcd.print("Dew point LOW");
lcd.setCursor(0, 1);
lcd.print(dewPoint(t, h));
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
digitalWrite(intakefan, HIGH);
digitalWrite(exfan, HIGH);
lcd.clear();
lcd.print("Humid Box On");
lcd.setCursor(0, 1);
lcd.print("Fans On");
delay(2000);
lcd.clear();
lcd.print("Dew Point Low");
lcd.setCursor(0, 1);
lcd.print(dewPoint(t, h));
lcd.setCursor(6, 1);
lcd.print("c");
delay(2000);
lcd.clear();
lcd.print("Temperature");
lcd.setCursor(0, 1);
lcd.print(dht.readTemperature());
delay(2000);
lcd.clear();
lcd.print("Humidity");
lcd.setCursor(0, 1);
lcd.print(dht.readHumidity());
lcd.setCursor(6, 1);
lcd.print("%");
lcd.clear();
}
I want to be able to change this;
if (currentDew > lowDry && (currentDew < highDry)) { // Level to aim for dew point
dewPointOk(t, h);
}
if (currentDew >= highDry) { // High dew point, send to dry box
dewPointHigh(t, h);
}
if (currentDew <= lowDry) { // Dew point low, send to humid box
dewPointLow(t, h);
}
}
with the push of a button be able to swap the lowDry and highDry to lowCure and highCure.
Can i do this??
2 posts - 2 participants
