From 5d91c5f6b014dc7d7f3864188e6a858600080723 Mon Sep 17 00:00:00 2001
From: Stephan Eisfeld <github@eisfeld.ws>
Date: Thu, 9 Aug 2018 12:08:22 +0200
Subject: [PATCH] fixes edge case when detecting nfc tags

---
 community/seisfeld/tonuino.ino | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/community/seisfeld/tonuino.ino b/community/seisfeld/tonuino.ino
index a00ac44..923f068 100644
--- a/community/seisfeld/tonuino.ino
+++ b/community/seisfeld/tonuino.ino
@@ -859,7 +859,11 @@ void loop()
       // ######################################################################
 
       // nfc tag is unknown but not not blank, ignore
-      else Serial.println(F("nfc | tag is not one of ours"));
+      else {
+        Serial.println(F("nfc | tag is not one of ours"));
+        mfrc522.PICC_HaltA();
+        mfrc522.PCD_StopCrypto1();
+      }
     }
     // # end - nfc tag is successfully read
     // ####################################