RC522 ，UID “0” maybe ignored

[kkstun]

rfid.esp uid += String(mfrc522.uid.uidByte[i], HEX);

if uid is 1bec07ec , will be 1bec7ec . The "0x07" ->7

for (int i = 0; i < mfrc522.uid.size; ++i) { if(mfrc522.uid.uidByte[i] < 16) uid += "0"; uid += String(mfrc522.uid.uidByte[i], HEX); } work well

any other good idea?

[omersiar]

Good finding, maybe we should get rid of string conversion.

[windy54]

I had not seen this issue and have added the same fix to the issue I rasied 466. They could both be combined and go with this fix or the one Hinkma suggested as a reply to 466 uid += String(mfrc522.uid.uidByte[mfrc522.uid.size - (i + 1)] < 0x10 ? "0" : ""); uid += String(mfrc522.uid.uidByte[mfrc522.uid.size - (i + 1)], HEX);

[kkstun]

nice