PN522 reader as keyboard using Cjmcu Beetle (ATMEGA32U4)

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PN522 reader that send data as keyaboard to PC using an CJMCU Beetle (ATMEGA32U4) Beetle programmed as Leonardo using Arduino IDE 1.8.5. PN522 set as I2C using dip on module (1=on 2=off). A yellow led with resistor is on when ready, active buzzer beep when good, double beep when wrong card (and led blink). I read max 16 char from card in block 5. I add < and > char for my purpose. Very hard to send to my italian keyaboard, keyboard.h library is for english keyboard scancode Libraries: Adafruit_PN532.h and Keyboar.h for leonardo Code (missing hashtag char): include <Keyboard.h> //Keyboard.h include <Wire.h> // Wire.h include <Adafruit_PN532.h> //Adafruit_PN532.h define PN532_IRQ A0 define PN532_RESET 15 define PIN_TONE 11 define PIN_LED 10 define PLAY_ERROR tone(11, 100,500) define PLAY_OKAY1 tone(11, 600, 200) define PLAY_OKAY2 tone(11, 700, 200) uint8_t success; // Flag to check if there was an error with the PN532 uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type) uint8_t currentblock; // Counter to keep track of which block we're on bool authenticated = false; // Flag to indicate if the sector is authenticated uint8_t data[16]; // Array to store block data during reads uint8_t keyuniversal[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; // Keyb on NDEF and Mifare Classic should be the same Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET); void setup(void) { delay(1000); pinMode(PIN_LED, OUTPUT); nfc.begin(); uint32_t versiondata = nfc.getFirmwareVersion(); if (! versiondata) { PLAY_ERROR; PLAY_ERROR; while (1) { digitalWrite(PIN_LED, HIGH); delay(300); digitalWrite(PIN_LED, LOW); }; // halt } nfc.SAMConfig(); // configure board to read RFID tags digitalWrite(PIN_LED, HIGH); Keyboard.begin(); } void loop(void) { // Wait a bit before trying again digitalWrite(PIN_LED, LOW); delay(2000); digitalWrite(PIN_LED, HIGH); success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength); if (!success) { PLAY_ERROR; return; } if (uidLength != 4) { PLAY_ERROR; return; } // We probably have a Mifare Classic card ... authenticated = false; currentblock = 5; if (nfc.mifareclassic_IsFirstBlock(currentblock)) authenticated = false; if (!authenticated) { success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, currentblock, 1, keyuniversal); if(!success) { PLAY_ERROR; return; } authenticated = true; } // If we're still not authenticated just skip the block // Authenticated ... we should be able to read the block now success = nfc.mifareclassic_ReadDataBlock(currentblock, data); if (!success) { PLAY_ERROR; return; } // Read successful for(int i=0;data[i]>0;i++) { if(data[i]=='<') { Keyboard.write(236); // < } else if(data[i]=='>') { Keyboard.press(KEY_LEFT_SHIFT); Keyboard.write(236); // > Keyboard.release(KEY_LEFT_SHIFT); } else { Keyboard.print((char)data[i]); } } PLAY_OKAY1; delay(100); PLAY_OKAY2; } PCB Wires: Yellow to led Blue GND for led and buzzer Green to buzzer PN522: Black GND Red VCC White to SDA Gray to SCL Purple to IRQ Pink to RTS0