From 19461b34d38871ba2722dab7a3a76028eddebaa1 Mon Sep 17 00:00:00 2001
From: Rotzbua <Rotzbua@users.noreply.github.com>
Date: Sun, 3 Dec 2017 11:30:31 +0100
Subject: [PATCH] Update README.rst

add cold solder joints hint
---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index dbd28e1..a1c7442 100644
--- a/README.rst
+++ b/README.rst
@@ -221,6 +221,7 @@ Troubleshooting
 * **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?**
 
   #. Check your connection, see `Pin Layout`_ .
+  #. Check your pin header soldering. Maybe you have cold solder joints.
   #. Check voltage. Most breakouts work with 3.3V.
   #. SPI only works with 3.3V, most breakouts seem 5V tollerant, but try a level shifter.
   #. SPI does not like long connections. Try shorter connections.