First, the MFRC Ethernet sketch should work via serial only too, even without the shield attached. Like you said, the goal is to offer a Swiss Army Knife approach to these things for users. I can likely add the blinking and 'reader connected' messages to the MFRC522 sketch. Also, the following is an Ethernet/Serial version of the PN532 sketch.?
// Include Libraries
#include <SPI.h>
#include <Adafruit_PN532.h>
#include <string.h>
#include <Ethernet.h>
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// Ethernet configuration
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(192, 168, 1, 177);
unsigned int serverPort = 8888; // Replace with the desired port number
EthernetServer server(serverPort); // Start the Ethernet server
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struct RFIDReader {
? char id;
? uint8_t ssPin;
? Adafruit_PN532 pn532;
? byte nuid[7];
? bool cardRead;
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? RFIDReader() : id(0), ssPin(0), pn532(Adafruit_PN532(0, &SPI)), cardRead(false) {}
};
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#if defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO)
const uint8_t ssPins[] = {9, 8, 7, 6, 5, A0};
const char readerID[] = {'A', 'B', 'C', 'D', 'E', 'F'};
#elif defined(ARDUINO_AVR_MEGA2560)
const uint8_t ssPins[] = {53, 52, 51, 50, 49, 48, 47, 46};
const char readerID[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'};
#endif
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const int numReaders = sizeof(ssPins) / sizeof(ssPins[0]);
RFIDReader readers[numReaders];
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void setup() {
? Serial.begin(9600);
? SPI.begin();
? Ethernet.begin(mac, ip); // Initialize the Ethernet
? server.begin(); // Start the Ethernet server
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? for (uint8_t i = 0; i < numReaders; i++) {
? ? readers[i].ssPin = ssPins[i];
? ? readers[i].id = readerID[i];
? ? readers[i].cardRead = false;
? ? readers[i].pn532 = Adafruit_PN532(ssPins[i], &SPI);
? ? readers[i].pn532.begin();
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? ? if (readers[i].pn532.getFirmwareVersion()) {
? ? ? readers[i].pn532.SAMConfig();
? ? ? // Print information about the detected reader
? ? ? Serial.print("Reader ");
? ? ? Serial.print(readers[i].id);
? ? ? Serial.print(" detected on SS pin: ");
? ? ? Serial.println(readers[i].ssPin);
? ? } else {
? ? ? readers[i].ssPin = 0; // Mark as not detected
? ? }
? }
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? pinMode(LED_BUILTIN, OUTPUT);
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? // Count the number of detected readers
? uint8_t detectedReaders = 0;
? for (uint8_t i = 0; i < numReaders; i++) {
? ? if (readers[i].ssPin != 0) {
? ? ? detectedReaders++;
? ? }
? }
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? // Blink the on-board LED based on the number of detected readers
? for (uint8_t i = 0; i < detectedReaders; i++) {
? ? digitalWrite(LED_BUILTIN, HIGH);
? ? delay(200);
? ? digitalWrite(LED_BUILTIN, LOW);
? ? if (i < detectedReaders - 1) {
? ? ? delay(200);
? ? }
? }
}
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void loop() {
? EthernetClient client = server.available(); // Check if there's a client connected
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? for (uint8_t i = 0; i < numReaders; i++) {
? ? if (readers[i].ssPin == 0) {
? ? ? continue;
? ? }
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? ? uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0};
? ? uint8_t uidLength;
? ? uint8_t success = readers[i].pn532.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
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? ? if (success) {
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? ? ? memcpy(readers[i].nuid, uid, 7);
? ? ? readers[i].cardRead = true;
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? ? ? byte checksum = readers[i].nuid[0];
? ? ? for (byte j = 1; j < 5; j++) {
? ? ? ? checksum ^= readers[i].nuid[j];
? ? ? }
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? ? ? // Send output to Serial connection
? ? ? Serial.write(readers[i].id);
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? ? ? // Send output to Ethernet client
? ? ? if (client) {
? ? ? ? client.write(readers[i].id);
? ? ? }
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? ? ? for (byte j = 0; j < 5; j++) {
? ? ? ? // Send output to Serial connection
? ? ? ? Serial.print(readers[i].nuid[j] < 0x10 ? "0" : "");
? ? ? ? Serial.print(readers[i].nuid[j], HEX);
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? ? ? ? // Send output to Ethernet client
? ? ? ? if (client) {
? ? ? ? ? client.print(readers[i].nuid[j] < 0x10 ? "0" : "");
? ? ? ? ? client.print(readers[i].nuid[j], HEX);
? ? ? ? }
? ? ? }
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? ? ? // Send output to Serial connection
? ? ? Serial.print(checksum < 0x10 ? "0" : "");
? ? ? Serial.print(checksum, HEX);
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? ? ? // Send output to Ethernet client
? ? ? if (client) {
? ? ? ? client.print(checksum < 0x10 ? "0" : "");
? ? ? ? client.print(checksum, HEX);
? ? ? }
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? ? ? // Send output to Serial connection
? ? ? Serial.write(0x0D);
? ? ? Serial.write(0x0A);
? ? ? Serial.write('>');
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? ? ? // Send output to Ethernet client
? ? ? if (client) {
? ? ? ? client.write(0x0D); // CR
? ? ? ? client.write(0x0A); // LF
? ? ? ? client.write('>');? // ETX replaced by '>'
? ? ? }
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? ? ? delay(500); // Add a delay to avoid multiple reads
? ? } else {
? ? ? readers[i].cardRead = false;
? ? }
? }
}
