From 906e57d5e410b7fc2e3756f0712a4c62cbc918a6 Mon Sep 17 00:00:00 2001
From: Rotzbua <Rotzbua@users.noreply.github.com>
Date: Thu, 6 May 2021 13:22:01 +0200
Subject: [PATCH] Add notice about power supply #560

---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index 2382724..26e6b8f 100644
--- a/README.rst
+++ b/README.rst
@@ -250,6 +250,7 @@ Troubleshooting
   #. Check your physical connection, see `Pin Layout`_ .
   #. Check your pin settings/variables in the code, see `Pin Layout`_ .
   #. Check your pin header soldering. Maybe you have cold solder joints.
+  #. Check your power supply. Maybe add a capacitor between 3.3V and GND to stabilize the power #560, sometimes an additional delay after `PCD_Init()` can help.
   #. Check voltage. Most breakouts work with 3.3V.
   #. SPI only works with 3.3V, most breakouts seem 5V tolerant, but try a level shifter.
   #. SPI does not like long connections. Try shorter connections.