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Refactor RFID code to add 0-leading to bytes when building tagID #8

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Refactor RFID code to add 0-leading to bytes when building tagID #8

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9 changes: 8 additions & 1 deletion rfid/rfid.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -104,11 +104,18 @@ boolean getID()
for ( uint8_t i = 0; i < 4; i++) {
//readCard[i] = mfrc522.uid.uidByte[i];
// Adds the 4 bytes in a single String variable
tagID.concat(String(mfrc522.uid.uidByte[i], HEX));
uint8_t value = mfrc522.uid.uidByte[i];
// Checks to see if the value is smaller
// than 16 (0x10) and adds the 0 padding needed if needed
if (value<0x10) {
tagID.concat("0");
}
tagID.concat(String(value, HEX));
}
//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
tagID.toUpperCase();
mfrc522.PICC_HaltA(); // Stop reading
return true;
//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
}