Introduction
In this Tutorial, we will build a Smart shopping cart with an EM-18 RFID Module And Arduino. This project is easy to build because it requires only a few components. our system is just scanners in the mart all products have their own RFID tag, when you just scan the product name and price will display on an LCD Display.
You Can Check Also More Arduino Base Projects
Bill of Materials
S.N | Component's | Quanitity | Link To Buy |
1 | Arduino nano | 1 | |
2 | 16x2 LCD Display | 1 | |
3 | EM-18 Module | 1 | |
4 | Push Button | 1 | |
5 | Red LED | 1 | |
6 | Green LED | 1 | |
7 | Buzzer | 1 | |
8 | RFID Tag | 1 | |
9 | Zero PCB | 1 |
Arduino Nano
Here We used the Arduino nano controller and we showed the pin diagram of the Arduino nano microcontroller.
16×2 LCD Display
In this Project, we used the 16×2 LCD the team or the cost of the product that you purchase in a mart.
they are connected to the I2C protocol and are only four-pin connections.
- VCC – 5V
- GND – GND
- SDA – A4
- SCL – A5
If you did not use the I2C then You are required to connect a 4-pin connection I will provide all proper connections in this Article.
- Rs – 12
- Rw – GND
- E – 11
- D4 – 10
- D5 – 9
- D6 – 8
- D7 – 7
EM-18 RFID Module
- VCC – 5V
- GND – GND
- Tx – Rx
If you don’t know How You Find the Em-18 RFID Card Number then just Flow The Video
If you used the RC-522 RFID Module then follow the Article Smart Shopping Cart Using RC522 RFID
LED
we just connected the LED to Pin Numbers 7 And 8 or Pin Numbers 4 and 6
Buzzer
The Buzzer will be connected to PIN 6
Zero PCB
We just soldering all the components in a Zero Pcb
Block Diagram
This one is The Block Diagram Of Our Project on the Input Side just connected to the EM-18 RFID Module and the output side Will be Connected to the 16×2 LCD Display, Buzzer, red LED, and green LED.
Circuit Diagram
With I2C Module-Based Circuit Diagram
Without I2C Module Based Circuit Diagram
PCB Design
- we designed a PCB with the help of EasyEDA Software
- and in this circuit diagram, we used the 16×2 LCD Display With I2C Module.
Source Code
Before You Upload the Final code first find out the RFID Tag Number Using This Circuit Diagram & Code.
How to Find RFID Tag, Number Link
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int count = 0; char card_no[12]; void setup() { Serial.begin(9600); } void loop() { if(Serial.available()) { count = 0; while(Serial.available() && count < 12) { card_no[count] = Serial.read(); count++; delay(5); } Serial.print(card_no); } } |
- Then Put the Code Here
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1 |
if ((strncmp(input, "xxxxxxxxxxxx", 12) == 0) && (a == 1)) |
- Then You Uploading The Final Code with I2C
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#include <Arduino.h> #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); char input[12]; int count = 0; int a; int p1 = 0, p2 = 0, p3 = 0, p4 = 0; int c1 = 0, c2 = 0, c3 = 0, c4 = 0; double total = 0; int count_prod = 0; void setup() { pinMode(A4, INPUT_PULLUP); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(5, OUTPUT); lcd.init(); lcd.backlight(); lcd.clear(); Wire.begin(); Serial.begin(9600); lcd.setCursor(0, 0); lcd.print(" AUTOMATIC BILL"); delay(2000); lcd.setCursor(0, 1); lcd.print(" SHOPPING CART "); delay(2000); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Plz Add iTem"); } void loop() { count = 0; while (Serial.available() && count < 12) { input[count] = Serial.read(); count++; delay(5); } int a = digitalRead(A4); if ((strncmp(input, "xxxxxxxxxxxx", 12) == 0) && (a == 1)) { lcd.setCursor(0, 0); lcd.print("Rice Added "); lcd.setCursor(0, 1); lcd.print("Price :- 10.00 "); p1++; digitalWrite(6, HIGH); digitalWrite(7, HIGH); digitalWrite(5, LOW); delay(2000); total = total + 10.00; count_prod++; digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, HIGH); } else if ((strncmp(input, "xxxxxxxxxxxx", 12) == 0) && (a == 0)) { if (p1 > 0) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Rice Removed!!! "); digitalWrite(6, HIGH); digitalWrite(7, HIGH); digitalWrite(5, LOW); delay(2000); p1--; total = total - 10.00; count_prod--; lcd.clear(); digitalWrite(6, LOW); digitalWrite(7, LOW); digitalWrite(5, HIGH); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Total Price :-"); lcd.setCursor(0, 1); lcd.print(total); } else { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Not in cart!!! "); digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, HIGH); delay(2000); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, LOW); lcd.clear(); } } if ((strncmp(input, "xxxxxxxxxxx", 12) == 0) && (a == 1)) { lcd.setCursor(0, 0); lcd.print("Coffee Added "); lcd.setCursor(0, 1); lcd.print("Price :- 20.00 "); p2++; digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, LOW); delay(2000); total = total + 20.00; count_prod++; digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, HIGH); } else if ((strncmp(input, "xxxxxxxxxxx", 12) == 0) && (a == 0)) { if (p2 > 0) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Coffee Removed!!! "); digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, LOW); delay(2000); p2--; total = total - 20.00; count_prod--; lcd.clear(); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, HIGH); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Total Price :-"); lcd.setCursor(0, 1); lcd.print(total); } else { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Not in cart!!! "); digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, HIGH); delay(2000); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, LOW); lcd.clear(); } } if ((strncmp(input, "xxxxxxxxxxx", 12) == 0) && (a == 1)) { lcd.setCursor(0, 0); lcd.print("Oil Added "); lcd.setCursor(0, 1); lcd.print("Price :- 25.00 "); p3++; digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, LOW); delay(2000); total = total + 25.00; count_prod++; digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, HIGH); } else if ((strncmp(input, "xxxxxxxxxxx", 12) == 0) && (a == 0)) { if (p3 > 0) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Oil Removed!!! "); digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, LOW); delay(2000); p3--; total = total - 25.00; count_prod--; lcd.clear(); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, HIGH); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Total Price :-"); lcd.setCursor(0, 1); lcd.print(total); } else { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Not in cart!!! "); digitalWrite(7, HIGH); digitalWrite(6, HIGH); digitalWrite(5, HIGH); delay(2000); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, LOW); lcd.clear(); } } } |
Demo Of Project
We just connected the USB cable to the Arduino nano microcontroller the LCD Will Display the Welcome Message.
Now we just scan the first item card and the LCD will display the item name and cost of the item.
Now we just scan the Second item card and the LCD will display the item name and cost of the item.
After a few seconds if we do not scan any card the LCD Will Display the total cost How many items do you purchase in a mart and how much cost you pay for the mart?
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