RFID Based LIQUID Vending Machine

1#include <LiquidCrystal.h>
2LiquidCrystal lcd(4, 5, 6, 7, 8, 9); //(RS,  EN, D4, D5, D6, D7)
3
4//you can add multiple tags no.
5String tag1 = "430077CECB31";  //you can change tag no.
6String tag2 = "3B004D93C025";
7
8byte statusLed    = 13;
9byte sensorInterrupt = 0;  // 0 = digital pin 2
10byte sensorPin       =  2;
11
12int tap = 3; //relay is connected which triger solenoid
13
14float calibrationFactor  = 4.5;
15
16volatile byte pulseCount;
17
18float flowRate;
19unsigned int flowMilliLitres;
20unsigned  long totalMilliLitres;
21unsigned long quantity = 1000; //1000ml-you can change  as per your requirment
22unsigned long flow_reading = 0;
23unsigned long oldTime;
24
25void  setup()
26{
27
28  Serial.begin(9600);
29  lcd.begin(16, 2);
30  lcd.setCursor(5,  0);
31  lcd.print("welcome");
32  lcd.setCursor(0, 1);
33  lcd.print("swipe  tag");
34
35  pinMode(statusLed, OUTPUT);
36  pinMode(tap, OUTPUT);
37  digitalWrite(statusLed,  HIGH);
38  Serial.println("cheked");
39  while (!Serial.available()) {
40    delay(1000);
41  }
42
43  digitalWrite(tap, HIGH);
44  pinMode(sensorPin, INPUT);
45  digitalWrite(sensorPin,  HIGH);
46
47  pulseCount        = 0;
48  flowRate          = 0.0;
49  flowMilliLitres   = 0;
50  totalMilliLitres  = 0;
51  oldTime           = 0;
52  attachInterrupt(sensorInterrupt,  pulseCounter, FALLING);
53}
54void loop()
55{
56  Serial.print("hi");
57  String tagdata = Serial.readString();
58  if (tagdata == tag1) //person1 tag  match if match he/she will get 1litre of liquid
59  {
60    lcd.clear();
61    lcd.setCursor(2,  0);
62    lcd.print("put pot");
63    lcd.setCursor(4, 1);
64    lcd.print("person1");
65    digitalWrite(tap, 1);
66    Serial.print("ok");
67    while (flow_reading  < quantity) {
68      flow_reading = getFlowData();
69      lcd.clear();
70      lcd.setCursor(0,  0);
71      lcd.print("Flow Amount ");
72      lcd.setCursor(0, 1);
73      lcd.print(flow_reading);
74
75      delay(1000);
76
77    }
78
79    //solenoid  to close via relay
80    digitalWrite(tap,  LOW);
81
82  }
83
84  else if (tagdata == tag2) //person2 tag match if match  he/she will get 1litre of liquid
85  {
86    lcd.clear();
87    lcd.setCursor(0,  0);
88    lcd.print("put pot");
89    lcd.setCursor(0, 1);
90    lcd.print("person  2");
91    digitalWrite(tap, 1);
92    while (flow_reading < quantity) {
93      flow_reading = getFlowData();
94      lcd.clear();
95      lcd.setCursor(0,  0);
96      lcd.print("Flow Amount ");
97      lcd.setCursor(0, 1);
98      lcd.print(flow_reading);
99
100      delay(1000);
101
102    }
103
104    //solenoid  to close via relay
105    digitalWrite(tap,  LOW);
106    lcd.clear();
107    lcd.setCursor(0, 0);
108    lcd.print("Remove  Pot");
109  }
110}
111unsigned long getFlowData() {
112
113  detachInterrupt(sensorInterrupt);
114
115  flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
116
117  oldTime = millis();
118
119  flowMilliLitres = (flowRate / 60) * 1000;
120  totalMilliLitres  += flowMilliLitres;
121
122  unsigned int frac;
123
124
125  pulseCount = 0;
126  attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
127
128  return totalMilliLitres;
129
130}
131
132void  pulseCounter()
133{
134  // Increment the pulse counter
135  pulseCount++;
136}

1#include <LiquidCrystal.h>
2LiquidCrystal lcd(4, 5, 6, 7, 8, 9); //(RS,
3  EN, D4, D5, D6, D7)
4
5//you can add multiple tags no.
6String tag1 = "430077CECB31";
7  //you can change tag no.
8String tag2 = "3B004D93C025";
9
10byte statusLed
11    = 13;
12byte sensorInterrupt = 0;  // 0 = digital pin 2
13byte sensorPin       =
14  2;
15
16int tap = 3; //relay is connected which triger solenoid
17
18float calibrationFactor
19  = 4.5;
20
21volatile byte pulseCount;
22
23float flowRate;
24unsigned int flowMilliLitres;
25unsigned
26  long totalMilliLitres;
27unsigned long quantity = 1000; //1000ml-you can change
28  as per your requirment
29unsigned long flow_reading = 0;
30unsigned long oldTime;
31
32void
33  setup()
34{
35
36  Serial.begin(9600);
37  lcd.begin(16, 2);
38  lcd.setCursor(5,
39  0);
40  lcd.print("welcome");
41  lcd.setCursor(0, 1);
42  lcd.print("swipe
43  tag");
44
45  pinMode(statusLed, OUTPUT);
46  pinMode(tap, OUTPUT);
47  digitalWrite(statusLed,
48  HIGH);
49  Serial.println("cheked");
50  while (!Serial.available()) {
51    delay(1000);
52
53  }
54
55  digitalWrite(tap, HIGH);
56  pinMode(sensorPin, INPUT);
57  digitalWrite(sensorPin,
58  HIGH);
59
60  pulseCount        = 0;
61  flowRate          = 0.0;
62  flowMilliLitres
63   = 0;
64  totalMilliLitres  = 0;
65  oldTime           = 0;
66  attachInterrupt(sensorInterrupt,
67  pulseCounter, FALLING);
68}
69void loop()
70{
71  Serial.print("hi");
72
73  String tagdata = Serial.readString();
74  if (tagdata == tag1) //person1 tag
75  match if match he/she will get 1litre of liquid
76  {
77    lcd.clear();
78    lcd.setCursor(2,
79  0);
80    lcd.print("put pot");
81    lcd.setCursor(4, 1);
82    lcd.print("person1");
83
84    digitalWrite(tap, 1);
85    Serial.print("ok");
86    while (flow_reading
87  < quantity) {
88      flow_reading = getFlowData();
89      lcd.clear();
90      lcd.setCursor(0,
91  0);
92      lcd.print("Flow Amount ");
93      lcd.setCursor(0, 1);
94      lcd.print(flow_reading);
95
96
97      delay(1000);
98
99    }
100
101    //solenoid  to close via relay
102    digitalWrite(tap,
103  LOW);
104
105  }
106
107  else if (tagdata == tag2) //person2 tag match if match
108  he/she will get 1litre of liquid
109  {
110    lcd.clear();
111    lcd.setCursor(0,
112  0);
113    lcd.print("put pot");
114    lcd.setCursor(0, 1);
115    lcd.print("person
116  2");
117    digitalWrite(tap, 1);
118    while (flow_reading < quantity) {
119
120      flow_reading = getFlowData();
121      lcd.clear();
122      lcd.setCursor(0,
123  0);
124      lcd.print("Flow Amount ");
125      lcd.setCursor(0, 1);
126      lcd.print(flow_reading);
127
128
129      delay(1000);
130
131    }
132
133    //solenoid  to close via relay
134    digitalWrite(tap,
135  LOW);
136    lcd.clear();
137    lcd.setCursor(0, 0);
138    lcd.print("Remove
139  Pot");
140  }
141}
142unsigned long getFlowData() {
143
144  detachInterrupt(sensorInterrupt);
145
146
147  flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
148
149
150  oldTime = millis();
151
152  flowMilliLitres = (flowRate / 60) * 1000;
153  totalMilliLitres
154  += flowMilliLitres;
155
156  unsigned int frac;
157
158
159  pulseCount = 0;
160
161  attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
162
163  return totalMilliLitres;
164
165}
166
167void
168  pulseCounter()
169{
170  // Increment the pulse counter
171  pulseCount++;
172}