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Extended RFID demo: display UID on OLED

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This commit is contained in:
zzzz 2024-05-01 00:22:27 +02:00
parent 04f49f8729
commit c48d941334
1 changed files with 17 additions and 0 deletions
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17
src/main.cpp
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@ -30,6 +30,15 @@ void serial_dump_byte_array(byte *buffer, byte bufferSize);
void printMsg(const String &s);
void printMsg(unsigned long l);
void oled_dump_byte_array(byte *buffer, byte bufferSize)
{
for (byte i = 0; i < bufferSize; i++)
{
display.print(buffer[i] < 0x10 ? " 0" : " ");
display.print(buffer[i], HEX);
}
}
void setup()
{
Serial.begin(9600);
@ -105,8 +114,16 @@ void loop()
// UID is a unique four hex pairs, e.g. E6 67 2A 12
Serial.print(F("Card UID:"));
serial_dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(0, 10);
display.println("Card UID: ");
oled_dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
display.println();
display.display();
// PICC type, e.g. "MIFARE 1K0"
Serial.print(F("PICC type: "));
MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);