MFRC522, Ethernet/Serial, Nano/Uno/Mega
Steve,
OK, so after much experimenting at home, it's simply the debugging messages being sent to the serial connection. I commented ALL of them out and now the sketch works via the serial connection as expected. LOL! The reason the Ethernet connection worked was because the debugging messages only were sent via Serial. Easy squeezy.
// Import Libraries
#include <SPI.h>? ? ? ? ? ?// SPI library for communicating with the MFRC522 reader
#include <MFRC522.h>? ? ? ?// MFRC522 library for reading RFID cards
#include <Ethernet.h>? ? ? // Ethernet library for the Ethernet shield
?
// Ethernet configuration
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(192, 168, 1, 177); // Replace with the desired IP address
unsigned int serverPort = 8888;? // Replace with the desired port number
EthernetServer server(serverPort);
?
// Define the SS (Slave Select) and RST (Reset) pins for each reader
#if defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO)
const uint8_t ssPins[] = {5, 6, 7, A0, A1, A2};
const uint8_t rstPins[] = {4, 8, 9, A3, A4, A5};
const uint8_t readerAssignment[] = {1, 2, 3, 4, 5, 6}; // Assign reader numbers based on SS and RST pins
#elif defined(ARDUINO_AVR_MEGA2560)
const uint8_t ssPins[] = {5, 6, 7, 8, 9, A0, A1, A2};
const uint8_t rstPins[] = {22, 23, 24, 25, 26, 27, 28, 29};
const uint8_t readerAssignment[] = {1, 2, 3, 4, 5, 6, 7, 8}; // Assign reader numbers based on SS and RST pins
#endif
?
const int numReaders = sizeof(ssPins) / sizeof(ssPins[0]);
const char readerID[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'};
?
struct RFIDReader {
? char id;
? uint8_t ssPin;
? uint8_t rstPin;
? MFRC522 mfrc522;
? byte nuid[7];
? bool isConnected;
?
? RFIDReader() : id(0), ssPin(0), rstPin(0), mfrc522(MFRC522(0, 0)), isConnected(false) {}
};
?
RFIDReader readers[numReaders];
EthernetClient client;
bool isEthernetConnected = false;
?
void setup() {
? Serial.begin(9600);
? SPI.begin();
? pinMode(10, OUTPUT);
? digitalWrite(10, HIGH);
?
? // Set pin 53 as OUTPUT for the Arduino Mega 2560
? #if defined(ARDUINO_AVR_MEGA2560)
? ? pinMode(53, OUTPUT);
? #endif
?
? pinMode(4, OUTPUT);
? digitalWrite(4, HIGH);
?
? Ethernet.begin(mac, ip);
?
? if (Ethernet.hardwareStatus() == EthernetNoHardware || Ethernet.linkStatus() == LinkOFF) {
? ? // Serial.println("Ethernet shield not connected or network not available");
? ? isEthernetConnected = false;
? } else {
? ? isEthernetConnected = true;
? }
?
? for (uint8_t i = 0; i < numReaders; i++) {
? ? readers[i].ssPin = ssPins[i];
? ? readers[i].rstPin = rstPins[i];
? ? readers[i].id = readerID[readerAssignment[i] - 1];
? ? readers[i].mfrc522 = MFRC522(readers[i].ssPin, readers[i].rstPin);
? ? readers[i].mfrc522.PCD_Init();
? ? readers[i].mfrc522.PCD_SetAntennaGain(readers[i].mfrc522.RxGain_max);
?
? ? // Check if the reader is connected
? ? if (readers[i].mfrc522.PCD_PerformSelfTest()) {
? ? ? readers[i].isConnected = true;
?
? ? ? // Print debugging information
? ? ? // Serial.print("Reader ");
? ? ? // Serial.print(readers[i].id);
? ? ? // Serial.print(" detected on SS pin ");
? ? ? // Serial.println(readers[i].ssPin);
? ? } else {
? ? ? readers[i].isConnected = false;
? ? }
? }
?
? if (isEthernetConnected) {
? ? server.begin();
? }
?
? // Blink the LED to indicate the number of detected readers
? pinMode(LED_BUILTIN, OUTPUT);
? for (int i = 0; i < numReaders; i++) {
? ? if (readers[i].isConnected) {
? ? ? digitalWrite(LED_BUILTIN, HIGH);
? ? ? delay(300);
? ? ? digitalWrite(LED_BUILTIN, LOW);
? ? ? delay(300);
? ? }
? }
}
?
void loop() {
? if (isEthernetConnected) {
? ? if (!client.connected()) {
? ? ? client.stop();
? ? ? client = server.accept();
? ? ? /*if (client) {
? ? ? ? Serial.println("Client connected");
? ? ? }*/
? ? }
? }
?
? for (uint8_t i = 0; i < numReaders; i++) {
? ? if (readers[i].isConnected && readers[i].mfrc522.PICC_IsNewCardPresent() && readers[i].mfrc522.PICC_ReadCardSerial()) {
? ? ? for (uint8_t j = 0; j < readers[i].mfrc522.uid.size; j++) {
? ? ? ? readers[i].nuid[j] = readers[i].mfrc522.uid.uidByte[j];
? ? ? }
?
? ? ? byte checksum = readers[i].nuid[0];
? ? ? for (uint8_t j = 1; j < 5; j++) {
? ? ? ? checksum ^= readers[i].nuid[j];
? ? ? }
?
? ? ? // Send output to Serial connection
? ? ? Serial.write(readers[i].id);
?
? ? ? // Send output to Ethernet client, if connected
? ? ? if (isEthernetConnected && client.connected()) {
? ? ? ? client.write(readers[i].id);
? ? ? }
?
? ? ? for (uint8_t 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);
?
? ? ? ? // Send output to Ethernet client, if connected
? ? ? ? if (isEthernetConnected && client.connected()) {
? ? ? ? ? client.print(readers[i].nuid[j] < 0x10 ? "0" : "");
? ? ? ? ? client.print(readers[i].nuid[j], HEX);
? ? ? ? }
? ? ? }
?
? ? ? // Send output to Serial connection
? ? ? Serial.print(checksum < 0x10 ? "0" : "");
? ? ? Serial.print(checksum, HEX);
?
? ? ? // Send output to Ethernet client, if connected
? ? ? if (isEthernetConnected && client.connected()) {
? ? ? ? client.print(checksum < 0x10 ? "0" : "");
? ? ? ? client.print(checksum, HEX);
? ? ? }
?
? ? ? // Send output to Serial connection
? ? ? Serial.write(0x0D);
? ? ? Serial.write(0x0A);
? ? ? Serial.write('>');
?
? ? ? // Send output to Ethernet client, if connected
? ? ? if (isEthernetConnected && client.connected()) {
? ? ? ? client.write(0x0D); // CR
? ? ? ? client.write(0x0A); // LF
? ? ? ? client.write('>');? // ETX replaced by '>'
? ? ? }
?
? ? ? readers[i].mfrc522.PICC_HaltA();
? ? ? readers[i].mfrc522.PCD_StopCrypto1();
? ? }
? }
}
Tom
