How to repair a Dehumidifier with Arduino Uno

1/*  Created by Mário Cordeiro, you can see the presentation in video  in  the Youtube MA2COR channel Tecnologies
2 *  https://www.youtube.com/channel/UC1UEzlX6C7bHL-PeAGvP-Kw
3  *  This sketch controls a  dehumidifier, the ON, OFF , radiator temperature and  water tank
4
5 */
6
7#define RelayFAN 2 //Controls  FAN
8#define RelayCOMP  3 //Controls the compressor
9#define Temperature A0 //measure the temperature  in the compressor radiator by using the thermocouple from the dehumidifier
10
11
12int  value = 0;
13int ledUnfreeze = 8; // unfreeze light indicator when the thermocouple  read low temperature ice formation 
14int ledON = 4; // ON - dehumidifier ON
15int  ledTank = 5; // warning light of full or out Water tank 
16int inputPin = 6;   //  Check if water tank is full or out
17int Buzzer = 7;   //Buzzer ON/OFF/Water tank  full or out
18int flagH = 0;  //To run once
19int flagM = 0;
20int flagL = 0;
21
22void  setup()
23{
24  
25  pinMode(RelayFAN,OUTPUT);
26  digitalWrite(RelayFAN,LOW);
27  pinMode(RelayCOMP,OUTPUT);
28  digitalWrite(RelayCOMP,LOW);
29  pinMode(Buzzer,  OUTPUT);
30  digitalWrite(Buzzer, LOW);  
31  pinMode(inputPin, INPUT);
32  digitalWrite(inputPin,  LOW);  
33  pinMode(ledON, OUTPUT);
34  pinMode(ledTank, OUTPUT);
35  pinMode(ledUnfreeze,  OUTPUT);    
36  Serial.begin(115200);
37  delay(10);
38
39
40}
41
42
43void  loop() {
44
45
46
47 value = digitalRead(inputPin); // Check if tank is full  or out (3V3- Digital 1 HIGH, 0V - digital 0 LOW)
48     Serial.print("Tank: ");  
49           Serial.println(value);
50        delay(200);
51        while  (value == 0){
52            digitalWrite(ledON, LOW);
53            digitalWrite(ledUnfreeze,  LOW);
54            digitalWrite(RelayFAN,LOW);
55            digitalWrite(RelayCOMP,LOW);
56            digitalWrite(Buzzer, HIGH);
57            tone(Buzzer, 1800, 500);
58            delay(500);
59            noTone(Buzzer);
60              // if the  LED is off turn it on and vice-versa:
61              if (digitalRead(ledTank)  == LOW) {
62                digitalWrite(ledTank, HIGH);
63                delay(500);
64                } else {
65                  digitalWrite(ledTank, LOW);
66                  delay(500);
67                        }
68            value = digitalRead(inputPin); // Check  inside de loop (3V3)                 
69        }
70              
71             int  Temp = analogRead(Temperature);     // Read de voltage in A0 and convert it to digital  0-1023
72             Serial.print("ConvertedTemp: ");//I made some tests with  the thermocouple in water at 0 degrees, 10, 20, 30, .... 80º and made conversion  in 0-1023
73             Serial.println(Temp);             
74                if  ((Temp > 700) && (flagH == 0)){     //Prevent ice formation, ICE in  evaporator,  Unfreeze process
75                digitalWrite(RelayCOMP,LOW);
76                delay(100);
77                digitalWrite(ledUnfreeze, HIGH);
78                delay(100);
79                digitalWrite(RelayFAN,HIGH);
80                digitalWrite(ledTank,  LOW);
81                tone(Buzzer, 1800, 2000);
82                delay(1000);
83                noTone(Buzzer);                
84                flagH = 1;
85                flagM = 0;
86                flagL = 0;noTone(Buzzer);
87                }
88                if ((Temp > 200) && (Temp < 701) && (flagM == 0)){ //Normal working
89                digitalWrite(RelayFAN,HIGH);
90                digitalWrite(RelayCOMP,HIGH);
91                delay(100);
92                digitalWrite(ledUnfreeze, LOW);
93                delay(100);
94                digitalWrite(RelayCOMP,HIGH);
95                digitalWrite(ledTank, LOW);
96                digitalWrite(ledON,  HIGH);
97                tone(Buzzer, 1800, 1000);
98                delay(1000);
99                noTone(Buzzer);                                
100                flagH  = 0;
101                flagM = 1;
102                flagL = 0;                
103                }                
104                 if ((Temp < 201) && (flagL  == 0)){ // High temperature in evaporator. Prevents damage
105                digitalWrite(RelayCOMP,LOW);
106                delay(100);
107                digitalWrite(ledUnfreeze, HIGH);
108                delay(100);
109                digitalWrite(RelayFAN,HIGH);
110                digitalWrite(ledTank, LOW);
111                digitalWrite(ledON,  LOW);
112                tone(Buzzer, 1800, 1000);
113                delay(1000);
114                tone(Buzzer, 1800, 1000);
115                noTone(Buzzer);                                                        
116                flagH = 0;
117                flagM = 0;
118                flagL  = 1;   
119                } 
120        }

1/*  Created by Mário Cordeiro, you can see the presentation in video  in
2  the Youtube MA2COR channel Tecnologies
3 *  https://www.youtube.com/channel/UC1UEzlX6C7bHL-PeAGvP-Kw
4
5  *  This sketch controls a  dehumidifier, the ON, OFF , radiator temperature and
6  water tank
7
8 */
9
10#define RelayFAN 2 //Controls  FAN
11#define RelayCOMP
12  3 //Controls the compressor
13#define Temperature A0 //measure the temperature
14  in the compressor radiator by using the thermocouple from the dehumidifier
15
16
17int
18  value = 0;
19int ledUnfreeze = 8; // unfreeze light indicator when the thermocouple
20  read low temperature ice formation 
21int ledON = 4; // ON - dehumidifier ON
22int
23  ledTank = 5; // warning light of full or out Water tank 
24int inputPin = 6;   //
25  Check if water tank is full or out
26int Buzzer = 7;   //Buzzer ON/OFF/Water tank
27  full or out
28int flagH = 0;  //To run once
29int flagM = 0;
30int flagL = 0;
31
32void
33  setup()
34{
35  
36  pinMode(RelayFAN,OUTPUT);
37  digitalWrite(RelayFAN,LOW);
38
39  pinMode(RelayCOMP,OUTPUT);
40  digitalWrite(RelayCOMP,LOW);
41  pinMode(Buzzer,
42  OUTPUT);
43  digitalWrite(Buzzer, LOW);  
44  pinMode(inputPin, INPUT);
45  digitalWrite(inputPin,
46  LOW);  
47  pinMode(ledON, OUTPUT);
48  pinMode(ledTank, OUTPUT);
49  pinMode(ledUnfreeze,
50  OUTPUT);    
51  Serial.begin(115200);
52  delay(10);
53
54
55}
56
57
58void
59  loop() {
60
61
62
63 value = digitalRead(inputPin); // Check if tank is full
64  or out (3V3- Digital 1 HIGH, 0V - digital 0 LOW)
65     Serial.print("Tank: ");
66  
67           Serial.println(value);
68        delay(200);
69        while
70  (value == 0){
71            digitalWrite(ledON, LOW);
72            digitalWrite(ledUnfreeze,
73  LOW);
74            digitalWrite(RelayFAN,LOW);
75            digitalWrite(RelayCOMP,LOW);
76
77            digitalWrite(Buzzer, HIGH);
78            tone(Buzzer, 1800, 500);
79
80            delay(500);
81            noTone(Buzzer);
82              // if the
83  LED is off turn it on and vice-versa:
84              if (digitalRead(ledTank)
85  == LOW) {
86                digitalWrite(ledTank, HIGH);
87                delay(500);
88
89                } else {
90                  digitalWrite(ledTank, LOW);
91                  delay(500);
92
93                        }
94            value = digitalRead(inputPin); // Check
95  inside de loop (3V3)                 
96        }
97              
98             int
99  Temp = analogRead(Temperature);     // Read de voltage in A0 and convert it to digital
100  0-1023
101             Serial.print("ConvertedTemp: ");//I made some tests with
102  the thermocouple in water at 0 degrees, 10, 20, 30, .... 80º and made conversion
103  in 0-1023
104             Serial.println(Temp);             
105                if
106  ((Temp > 700) && (flagH == 0)){     //Prevent ice formation, ICE in  evaporator,
107  Unfreeze process
108                digitalWrite(RelayCOMP,LOW);
109                delay(100);
110
111                digitalWrite(ledUnfreeze, HIGH);
112                delay(100);
113
114                digitalWrite(RelayFAN,HIGH);
115                digitalWrite(ledTank,
116  LOW);
117                tone(Buzzer, 1800, 2000);
118                delay(1000);
119
120                noTone(Buzzer);                
121                flagH = 1;
122
123                flagM = 0;
124                flagL = 0;noTone(Buzzer);
125                }
126
127                if ((Temp > 200) && (Temp < 701) && (flagM == 0)){ //Normal working
128
129                digitalWrite(RelayFAN,HIGH);
130                digitalWrite(RelayCOMP,HIGH);
131
132                delay(100);
133                digitalWrite(ledUnfreeze, LOW);
134
135                delay(100);
136                digitalWrite(RelayCOMP,HIGH);
137
138                digitalWrite(ledTank, LOW);
139                digitalWrite(ledON,
140  HIGH);
141                tone(Buzzer, 1800, 1000);
142                delay(1000);
143
144                noTone(Buzzer);                                
145                flagH
146  = 0;
147                flagM = 1;
148                flagL = 0;                
149
150                }                
151                 if ((Temp < 201) && (flagL
152  == 0)){ // High temperature in evaporator. Prevents damage
153                digitalWrite(RelayCOMP,LOW);
154
155                delay(100);
156                digitalWrite(ledUnfreeze, HIGH);
157
158                delay(100);
159                digitalWrite(RelayFAN,HIGH);
160
161                digitalWrite(ledTank, LOW);
162                digitalWrite(ledON,
163  LOW);
164                tone(Buzzer, 1800, 1000);
165                delay(1000);
166
167                tone(Buzzer, 1800, 1000);
168                noTone(Buzzer);                                                        
169
170                flagH = 0;
171                flagM = 0;
172                flagL
173  = 1;   
174                } 
175        }