Fix read with MFRC522

Zeros in UID had a bug in HEX conversion
esprfid · Mar 28, 2023 · abd0e66 · abd0e66
1 parent 5543625
commit abd0e66
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/rfid.esp b/src/rfid.esp
@@ -114,7 +114,7 @@ void mfrc522Read()
 #endif
 	for (int i = 0; i < mfrc522.uid.size; ++i)
 	{
-		uid += String(mfrc522.uid.uidByte[i], HEX);
+		uid += String(mfrc522.uid.uidByte[mfrc522.uid.size - (i + 1)] < 0x10 ? "0" : "");
 		rfidState = cardSwiped;
 	}
 #ifdef DEBUG