Arduino Based Automatic Solder Fan

1#define ledPin D4
2#define sensorPin D1
3#define relayPin D2
4
5unsigned
6  long previousMillis = 0;
7const long interval = 1000;
8int serialAlert = 0;
9
10void
11  setup() {
12  // put your setup code here, to run once:
13  
14  Serial.begin(9600);
15  
16  pinMode(ledPin, OUTPUT);
17  pinMode(sensorPin, INPUT);
18  pinMode(relayPin,
19  OUTPUT);
20}
21
22void loop() {
23  // put your main code here, to run repeatedly:
24
25
26  unsigned long currentMillis = millis();
27
28  if (currentMillis - previousMillis
29  >= interval) {
30    previousMillis = currentMillis;
31
32    if (digitalRead(sensorPin)
33  == LOW) {
34      if (serialAlert == 0) {
35        Serial.println("Objected
36  Detected");
37        serialAlert = 1;
38      }
39      digitalWrite(ledPin,
40  HIGH);
41      digitalWrite(relayPin, LOW);
42    }
43
44    else {
45      if
46  (serialAlert == 1) {
47        Serial.println("No Objected Detected");
48        serialAlert
49  = 0;
50      }
51      digitalWrite(ledPin, LOW);
52      digitalWrite(relayPin,
53  HIGH);
54    }
55
56  } //end millis loop
57
58}

1#define ledPin D4
2#define sensorPin D1
3#define relayPin D2
4
5unsigned  long previousMillis = 0;
6const long interval = 1000;
7int serialAlert = 0;
8
9void  setup() {
10  // put your setup code here, to run once:
11  
12  Serial.begin(9600);  
13  pinMode(ledPin, OUTPUT);
14  pinMode(sensorPin, INPUT);
15  pinMode(relayPin,  OUTPUT);
16}
17
18void loop() {
19  // put your main code here, to run repeatedly:
20
21  unsigned long currentMillis = millis();
22
23  if (currentMillis - previousMillis  >= interval) {
24    previousMillis = currentMillis;
25
26    if (digitalRead(sensorPin)  == LOW) {
27      if (serialAlert == 0) {
28        Serial.println("Objected  Detected");
29        serialAlert = 1;
30      }
31      digitalWrite(ledPin,  HIGH);
32      digitalWrite(relayPin, LOW);
33    }
34
35    else {
36      if  (serialAlert == 1) {
37        Serial.println("No Objected Detected");
38        serialAlert  = 0;
39      }
40      digitalWrite(ledPin, LOW);
41      digitalWrite(relayPin,  HIGH);
42    }
43
44  } //end millis loop
45
46}