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pacifiquempacifiquem
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feat: added rfid transaction system
1 parent e50a5e1 commit 01db2a8

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4 files changed

+263
-99
lines changed

4 files changed

+263
-99
lines changed

‎reading-rfid.ino/reading-rfid.ino renamed to ‎reading-rfid.ino/reading-rfid/reading-rfid.ino

+1-1
Original file line numberDiff line numberDiff line change
@@ -32,7 +32,7 @@ void loop(){
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mfrc522.PCD_StopCrypto1();
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}
3434
String readBytesFromBlock(){
35-
byte blockNumber = 4;
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byte blockNumber = 8;
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card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, blockNumber, &key, &(mfrc522.uid));
3838
if(card_status != MFRC522::STATUS_OK){

‎rfid-transaction.ino/rfid-transaction/rfid-transaction.ino/rfid-transaction.ino.ino

+181
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,181 @@
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/*
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* Project Name: RFID Transaction Management System
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* Author: Murangwa Pacifique
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* Co-Authors: Ighor - Tresor
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*/
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#include <SPI.h>
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#include <MFRC522.h>
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#define RST_PIN 9
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#define SS_PIN 10
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MFRC522 mfrc522(SS_PIN, RST_PIN);
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MFRC522::MIFARE_Key key;
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MFRC522::StatusCode card_status;
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int moneyAmount = 0;
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int pointsAmount = 0;
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void setup() {
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Serial.begin(9600);
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SPI.begin();
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mfrc522.PCD_Init();
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Serial.println(F("\n ==== Place the card near the reader. ==== \n"));
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}
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void loop() {
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for (byte i = 0; i < 6; i++) {
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key.keyByte[i] = 0xFF;
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}
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if (!mfrc522.PICC_IsNewCardPresent()) {
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return;
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}
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if (!mfrc522.PICC_ReadCardSerial()) {
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Serial.println(mfrc522.PICC_ReadCardSerial());
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Serial.println(F("Error reading card."));
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return;
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}
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byte buffer[18]; // Increased buffer size to account for null character
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byte moneyBlock = 4;
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byte pointsBlock = 8;
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byte len;
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Serial.println(F("Card detected."));
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// Authenticate moneyBlock to read money amount
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card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, moneyBlock, &key, &(mfrc522.uid));
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if (card_status != MFRC522::STATUS_OK) {
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Serial.println(F("Authentication error for moneyBlock."));
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return;
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}
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// Read money amount from moneyBlock
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card_status = mfrc522.MIFARE_Read(moneyBlock, buffer, &len);
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if (card_status != MFRC522::STATUS_OK) {
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Serial.println(F("Error reading moneyBlock."));
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return;
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}
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buffer[len] = '\0'; // Null-terminate the buffer
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moneyAmount = atoi((char*)buffer);
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// Authenticate block 8 to read pointsBlock amount
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card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, pointsBlock, &key, &(mfrc522.uid));
74+
if (card_status != MFRC522::STATUS_OK) {
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Serial.println(F("Authentication error for pointsBlock."));
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return;
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}
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// Read points amount from pointsBlock
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card_status = mfrc522.MIFARE_Read(pointsBlock, buffer, &len);
81+
if (card_status != MFRC522::STATUS_OK) {
82+
Serial.println(F("Error reading pointsBlock."));
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return;
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}
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buffer[len] = '\0'; // Null-terminate the buffer
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pointsAmount = atoi((char*)buffer);
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Serial.print(F("Available Money: $"));
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Serial.println(moneyAmount);
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Serial.print(F("Available Points: "));
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Serial.println(pointsAmount);
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Serial.println(F("Enter 'm' to use money, 'p' to use points:"));
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while (Serial.available() <= 0) {
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//Wait for input
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}
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char input = Serial.read();
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int amount = 0;
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if (input == 'm') {
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Serial.println(F("Enter the amount to deduct from money: "));
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while (Serial.available() <= 1) {
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// Wait for input
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}
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amount = Serial.parseInt();
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if (amount > moneyAmount) {
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Serial.println(F("Insufficient funds."));
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return;
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}
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moneyAmount -= amount;
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pointsAmount += 10; // Increased points by 10 because he/she used money
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Serial.println(F("Transaction completed successfully."));
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} else if (input == 'p') {
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Serial.println(F("Enter the amount to deduct from points: "));
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while (Serial.available() <= 1) {
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// Wait for input
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}
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amount = Serial.parseInt();
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131+
if (amount > pointsAmount) {
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Serial.println(F("Insufficient funds."));
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return;
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}
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pointsAmount -= amount;
137+
Serial.println(F("Transaction completed successfully."));
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} else {
139+
Serial.println("Invalid Input.");
140+
return;
141+
}
142+
143+
sprintf((char*)buffer, "%d", moneyAmount);
144+
card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, moneyBlock, &key, &(mfrc522.uid));
145+
if (card_status != MFRC522::STATUS_OK) {
146+
Serial.println(F("Authentication error for moneyBlock."));
147+
return;
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}
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card_status = mfrc522.MIFARE_Write(moneyBlock, buffer, 16);
150+
if (card_status != MFRC522::STATUS_OK) {
151+
Serial.println(F("Error writing to moneyBlock."));
152+
return;
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}
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155+
sprintf((char*)buffer, "%d", pointsAmount);
156+
card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, pointsBlock, &key, &(mfrc522.uid));
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if (card_status != MFRC522::STATUS_OK) {
159+
Serial.println(F("Authentication error for block 8."));
160+
return;
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}
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card_status = mfrc522.MIFARE_Write(pointsBlock, buffer, 16);
164+
165+
if (card_status != MFRC522::STATUS_OK) {
166+
Serial.println(F("Error writing to pointsBlock."));
167+
return;
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}
169+
170+
Serial.print(F("Remaining Money: $"));
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Serial.println(moneyAmount);
172+
Serial.print(F("Remaining Points: "));
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Serial.println(pointsAmount);
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175+
mfrc522.PICC_HaltA();
176+
mfrc522.PCD_StopCrypto1();
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Serial.println("Wait 10 seconds before making another transaction");
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180+
delay(10000); // Delay to allow card removal before the next transaction
181+
}

‎writing-rfid.ino/writing.ino

-98
This file was deleted.

‎writing.ino/writing/writing.ino

+81
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,81 @@
1+
#include <SPI.h>
2+
#include <MFRC522.h>
3+
#define RST_PIN 9
4+
#define SS_PIN 10
5+
MFRC522 mfrc522(SS_PIN, RST_PIN);
6+
MFRC522::MIFARE_Key key;
7+
MFRC522::StatusCode card_status;
8+
void setup(){
9+
Serial.begin(9600);
10+
SPI.begin();
11+
mfrc522.PCD_Init();
12+
Serial.println(F("Enter data, ending with #"));
13+
Serial.println("");
14+
}
15+
void loop(){
16+
for(byte i = 0; i < 6; i++){
17+
key.keyByte[i] = 0xFF;
18+
}
19+
if(!mfrc522.PICC_IsNewCardPresent()){
20+
return;
21+
}
22+
23+
if (!mfrc522.PICC_ReadCardSerial()){
24+
Serial.println("[Bring PIIC closer to PCD]");
25+
return;
26+
}
27+
28+
byte buffr[16];
29+
byte block = 8;
30+
byte len;
31+
32+
Serial.setTimeout(1000L);
33+
/*
34+
* Read data from serial
35+
*/
36+
len = Serial.readBytesUntil('#', (char *) buffr, 16) ;
37+
Serial.println("[PIIC ready!]");
38+
if(len>0){
39+
for(byte i = len; i < 16; i++){
40+
buffr[i] = ' '; //We have to pad array items with spaces.
41+
}
42+
String mString;
43+
mString = String((char*)buffr);
44+
45+
Serial.println(" ");
46+
writeBytesToBlock(block, buffr);
47+
Serial.println(" ");
48+
mfrc522.PICC_HaltA();
49+
mfrc522.PCD_StopCrypto1();
50+
Serial.print("Saved on block ");
51+
Serial.print(block);
52+
Serial.print(":");
53+
Serial.println(mString);
54+
Serial.println("Note: To rewrite to this PICC, take it away from the PCD, and bring it closer again.");
55+
}
56+
delay(500);
57+
}
58+
void writeBytesToBlock(byte block, byte buff[]){
59+
card_status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid));
60+
61+
if(card_status != MFRC522::STATUS_OK) {
62+
Serial.print(F("PCD_Authenticate() failed: "));
63+
Serial.println(mfrc522.GetStatusCodeName(card_status));
64+
return;
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}
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else{
68+
Serial.println(F("PCD_Authenticate() success: "));
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}
70+
// Write block
71+
card_status = mfrc522.MIFARE_Write(block, buff, 16);
72+
73+
if (card_status != MFRC522::STATUS_OK) {
74+
Serial.print(F("MIFARE_Write() failed: "));
75+
Serial.println(mfrc522.GetStatusCodeName(card_status));
76+
return;
77+
}
78+
else{
79+
Serial.println(F("Data saved."));
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}
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}

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