Add notice about power supply #560

2021-05-06 13:22:01 +02:00
parent a6bf4dcf0f
commit 906e57d5e4
1 changed files with 1 additions and 0 deletions
--- 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.