Terrarium Climate Control System

1#include <LiquidCrystal.h>
2
3
4const int SOIL_POW = A0;
5const int SOIL_SENS = A1;
6const int TEMP = A2;
7const int FAN_LIGHT = 2;
8const int HEAT_LAMP = 9;
9
10const int RS = 3;
11const int E = 4;
12const int DB4 = 5;
13const int DB5 = 6;
14const int DB6 = 7;
15const int DB7 = 8;
16
17
18const char DEGREE = (char) 178;
19
20LiquidCrystal lcd(RS, E, DB4, DB5, DB6, DB7);
21
22int moisture = 0;
23int tempVal;
24int tempC;
25
26void setup()
27{
28  lcd.begin(16,2);
29  
30  pinMode(TEMP, INPUT);
31  pinMode(FAN_LIGHT, OUTPUT);
32  pinMode(HEAT_LAMP, OUTPUT);
33  
34  pinMode(SOIL_POW, OUTPUT);
35  pinMode(SOIL_SENS, INPUT);
36}
37
38void loop()
39{
40  lcd.clear();
41  
42  tempVal = analogRead(TEMP);
43  tempC = map(tempVal, 20, 358, -40, 125);
44  
45  digitalWrite(SOIL_POW, HIGH);
46  delay(10);
47  moisture = analogRead(SOIL_SENS);
48  digitalWrite(SOIL_POW, LOW);
49  
50  lcd.setCursor(0,0);
51  lcd.print("Temp: ");
52  lcd.print(tempC);
53  lcd.print(DEGREE);
54  lcd.print("C ");
55  lcd.setCursor(0,1);
56  
57  if (moisture < 300){
58    lcd.print("Water ASAP");
59  }
60  else if (moisture < 600){
61    lcd.print("Dry");
62  }
63  else{
64    lcd.print("Moist");
65  }
66  if (tempC < 25){
67    digitalWrite(HEAT_LAMP, HIGH);
68    digitalWrite(FAN_LIGHT, LOW);
69  }
70  else if (tempC > 29){
71    digitalWrite(HEAT_LAMP, LOW);
72    digitalWrite(FAN_LIGHT, HIGH);
73  }
74  else {
75    digitalWrite(FAN_LIGHT, LOW);
76    digitalWrite(HEAT_LAMP, LOW);
77  }
78  delay(1000);
79}