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Adafruit ESP32 + PN532 Shield I2C Problem
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Adafruit ESP32 + PN532 Shield I2C Problem

by AlfredAB on Wed Nov 27, 2019 5:40 pm

Hy Community,

I try to connect a adafruit ESP32 with the PN532 Shield over the I2C Connection.
Every time i run the sample code the serial output display ( "Didn't find PN53x board")
If i run a I2C Scan the output showes me the adress 0x24. I tried to change the adress in the libary as well, but the error still exist.
i also made a test with a normal Arduino and the same code. Then it works. Does the ESP32 works different?

i attached a screen from the wiring.

Thanks for helping

Fredi
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AlfredAB
 
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Re: Adafruit ESP32 + PN532 Shield I2C Problem

by brubell on Mon Dec 02, 2019 11:24 am

It looks like the PN532 is connected from its 5V to the ESP32's 3V Pin. Try connecting the 3V pin on the PN532 to the 3V Pin one the ESP32.

brubell
 
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Please be positive and constructive with your questions and comments.