125khz RFID tag reading functionality #116
Description
It would be nice if Bruce could include RFID125khz tag reading with a Grove RFID UART module
https://wiki.seeedstudio.com/Grove-125KHz_RFID_Reader/
Working Example
#include <M5Cardputer.h>
#include <FastLED.h>
#define PIN_LED 21 // Builtin
#define PIN_RX 1
#define PIN_TX 2
#define NUM_LEDS 1
CRGB leds[NUM_LEDS]; // init RGB LED builtin
HardwareSerial RFIDSerial(1); // UART1
unsigned char buffer[64]; // buffer array for data received over serial port
int count = 0; // counter for buffer array
M5GFX &Display = M5Cardputer.Display;
void clearBufferArray() {
for (int i = 0; i < count; i++) {
buffer[i] = 0;
}
}
void displayBuffer(unsigned char* buffer, int length) {
// Reset Screen
Display.fillRect(0, 67, 240, 70, TFT_BLACK);
Display.setTextColor(TFT_WHITE);
Display.setTextSize(1.4);
// STX
Display.setCursor(10, 67);
Display.printf("STX: %02X", buffer[0]);
// HEX
Display.setCursor(10, 80);
int halfLength = (length - 2) / 2;
for (int i = 1; i < length - 1; i++) { // data between STX and ETX
if (i == halfLength + 1) {
Display.setCursor(10, 93);
}
Display.printf("%02X ", buffer[i]);
}
// ETX
Display.setCursor(10, 106);
Display.printf("ETX: %02X", buffer[length - 1]);
// ASCII
M5Cardputer.Display.setTextColor(TFT_ORANGE);
Display.setTextSize(1.1);
Display.setCursor(55, 120);
Display.printf("ASCII: .");
for (int i = 1; i < length - 1; i++) {
Display.printf("%c", buffer[i]);
}
Display.printf(".");
}
void setup() {
// UART init
RFIDSerial.begin(9600, SERIAL_8N1, PIN_RX, PIN_TX);
// Cardputer Init
auto cfg = M5.config();
M5Cardputer.begin(cfg, true);
Display.setRotation(1);
Display.setTextColor(TFT_LIGHTGRAY);
Display.setTextSize(2);
// Display Title
M5Cardputer.Display.drawRect(10, 10, 220, 40, TFT_LIGHTGRAY);
M5Cardputer.Display.setTextColor(TFT_LIGHTGRAY);
M5Cardputer.Display.setCursor(18, 18);
M5Cardputer.Display.setTextSize(3.2);
M5Cardputer.Display.printf("RFID 125KHZ");
// Dislay Tag infos
M5Cardputer.Display.setTextSize(1);
M5Cardputer.Display.setCursor(68,55);
M5Cardputer.Display.setTextColor(TFT_ORANGE);
M5Cardputer.Display.printf("Waiting for tags");
M5Cardputer.Display.setTextColor(TFT_LIGHTGRAY);
// Builtin LED init
FastLED.addLeds<WS2812, PIN_LED, GRB>(leds, NUM_LEDS);
}
void loop() {
if (RFIDSerial.available()) {
while (RFIDSerial.available()) { // Read data
buffer[count++] = RFIDSerial.read(); // Write data into buffer
if (count == 64) break;
}
// Led & Buzzer
M5Cardputer.Speaker.tone(5000, 20);
leds[0] = CRGB::Green;
FastLED.show();
delay(20);
FastLED.clear(true);
// Screen
displayBuffer(buffer, count);
clearBufferArray();
count = 0;
}
delay(200);
}