libs/RFID.MFRC522
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add notice according to #299

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Rotzbua
2018-06-12 15:15:18 +02:00
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commit c8b922c8a4
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README.rst
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@@ -223,7 +223,8 @@ Troubleshooting
* **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?** * **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?**
#. Check your connection, see `Pin Layout`_ . #. 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 pin header soldering. Maybe you have cold solder joints.
#. Check voltage. Most breakouts work with 3.3V. #. 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 only works with 3.3V, most breakouts seem 5V tollerant, but try a level shifter.