feat: implemented simple logic to detect cards and send information to master via I2C

APL_Master/README.md

@@ -10,4 +10,11 @@ Addresses:
  - Slave 2 -> `0x09`
  - Slave 3 -> `0x0A`
  - Slave 4 -> `0x0B`
- - Slave 5 -> `0x0C`
+ - Slave 5 -> `0x0C`
+
+# LED config
+
+Led Type: WS2812B
+Pin: 5
+Count: 29
+Color Order: GRB

APL_Master/src/main.cpp

@@ -38,6 +38,9 @@ void setup()
 void loop()
 {
   // put your main code here, to run repeatedly:
+  // TODO: Implement the main loop logic for I2C communication with slave devices
+  // TODO: Implement the logic to control the LED strip based on the received data from slave devices
+  // TODO: Send informations to PC via Serial communication, needs to be implemented based on the previous code snippets.
 }
 
 void testLedStrip()

APL_Slave_1/platformio.ini

@@ -13,4 +13,6 @@ platform = espressif32
 board = esp32dev
 framework = arduino
 
-monitor_speed = 115200
+monitor_speed = 115200
+
+lib_deps = miguelbalboa/MFRC522@^1.4.12

APL_Slave_1/src/main.cpp

@@ -1,13 +1,64 @@
 #include <Arduino.h>
 #include <Wire.h>
+#include <MFRC522.h>
 
 #define SDA_PIN 21
 #define SCL_PIN 22
 
 #define SLAVE_ADDRESS 0x08
 
+// Card reader pins
+#define READER_COUNT 6
+
+#define RST_PIN 9
+
+#define SS_ONE_PIN 10
+#define SS_TWO_PIN 5
+#define SS_THREE_PIN 4
+#define SS_FOUR_PIN 2
+#define SS_FIVE_PIN 15
+#define SS_SIX_PIN 13
+
+// Card status definitions
+#define CARD_NOT_DETECTED 0
+#define CARD_OK 1
+#define CARD_WRONG 2
+
+// Slave select pins for each reader
+const byte SS_PINS[READER_COUNT] = {SS_ONE_PIN, SS_TWO_PIN, SS_THREE_PIN, SS_FOUR_PIN, SS_FIVE_PIN, SS_SIX_PIN};
+
+// I2C addresses for each reader
+// TODO: Update the addresses to specific setup
+const byte READER_ADDRESSES[READER_COUNT] = {
+    0x04, 0x05, 0x06, 0x07, 0x08, 0x09};
+
+// List of proper cards uuid's
+const byte CORRECT_UIDS[READER_COUNT][4] = {
+    {0xDE, 0xAD, 0xBE, 0xEF}, // Reader 1
+    {0xCA, 0xFE, 0xBA, 0xBE}, // Reader 2
+    {0xFA, 0xCE, 0xB0, 0x0C}, // Reader 3
+    {0xBA, 0xAD, 0xF0, 0x0D}, // Reader 4
+    {0xFE, 0xED, 0xFA, 0xCE}, // Reader 5
+    {0xC0, 0xFF, 0xEE, 0x00}  // Reader 6
+};
+
+// Reader statuses: 0 - not detected, 1 - okey, 2 - wrong card
+volatile byte readerStatus[READER_COUNT] = {
+    CARD_NOT_DETECTED,
+    CARD_NOT_DETECTED,
+    CARD_NOT_DETECTED,
+    CARD_NOT_DETECTED,
+    CARD_NOT_DETECTED,
+    CARD_NOT_DETECTED};
+
+MFRC522 mfrc522[READER_COUNT]; // Create MFRC522 instances for each reader
+
 void requestEvent();
 
+void initializeReaders();
+
+bool compareUID(byte *readUID, const byte *correctUID, byte size);
+
 void setup()
 {
   Serial.begin(115200);
@@ -15,15 +66,73 @@ void setup()
   Wire.begin(SDA_PIN, SCL_PIN, SLAVE_ADDRESS); // Initialize I2C with specified SDA and SCL pins
 
   Wire.onRequest(requestEvent);
+
+  initializeReaders();
 }
 
 void loop()
 {
+  for (byte i = 0; i < READER_COUNT; i++)
+  {
+    if (!mfrc522[i].PICC_IsNewCardPresent() || !mfrc522[i].PICC_ReadCardSerial())
+    {
+      MFRC522::StatusCode buffer_status;
+      byte buffer_atqa[2];
+      byte buffer_size = sizeof(buffer_atqa);
+
+      buffer_status = mfrc522[i].PICC_WakeupA(buffer_atqa, &buffer_size);
+
+      if (buffer_status != MFRC522::STATUS_OK)
+      {
+        readerStatus[i] = CARD_NOT_DETECTED;
+      }
+      continue;
+    }
+
+    if (compareUID(mfrc522[i].uid.uidByte, CORRECT_UIDS[i], mfrc522[i].uid.size))
+    {
+      readerStatus[i] = CARD_OK;
+    }
+    else
+    {
+      readerStatus[i] = CARD_WRONG;
+    }
+
+    mfrc522[i].PICC_HaltA();
+    mfrc522[i].PCD_StopCrypto1();
+  }
+
+  delay(50);
+}
+
+void initializeReaders()
+{
+  for (byte i = 0; i < READER_COUNT; i++)
+  {
+    mfrc522[i].PCD_Init(SS_PINS[i], RST_PIN);
+  }
+}
+
+bool compareUID(byte *readUID, const byte *correctUID, byte size)
+{
+  for (byte i = 0; i < size; i++)
+  {
+    if (readUID[i] != correctUID[i])
+    {
+      return false;
+    }
+  }
+  return true;
 }
 
 void requestEvent()
 {
-  // TODO: Send data to the master when requested
-  Serial.println("Master requested data from Slave.");
-  Wire.write("Hello from Slave!");
+  byte outputData[READER_COUNT];
+
+  for (byte i = 0; i < READER_COUNT; i++)
+  {
+    outputData[i] = READER_ADDRESSES[i] + readerStatus[i];
+  }
+
+  Wire.write(outputData, READER_COUNT);
 }

APL_Slave_2/platformio.ini

@@ -13,4 +13,6 @@ platform = espressif32
 board = esp32dev
 framework = arduino
 
-monitor_speed = 115200
+monitor_speed = 115200
+
+lib_deps = miguelbalboa/MFRC522@^1.4.12

APL_Slave_3/platformio.ini

@@ -13,4 +13,6 @@ platform = espressif32
 board = esp32dev
 framework = arduino
 
-monitor_speed = 115200
+monitor_speed = 115200
+
+lib_deps = miguelbalboa/MFRC522@^1.4.12

APL_Slave_4/platformio.ini

@@ -13,4 +13,6 @@ platform = espressif32
 board = esp32dev
 framework = arduino
 
-monitor_speed = 115200
+monitor_speed = 115200
+
+lib_deps = miguelbalboa/MFRC522@^1.4.12

APL_Slave_5/platformio.ini

@@ -13,4 +13,6 @@ platform = espressif32
 board = esp32dev
 framework = arduino
 
-monitor_speed = 115200
+monitor_speed = 115200
+
+lib_deps = miguelbalboa/MFRC522@^1.4.12