Improved keyboard wedge

ekt · December 17, 2021, 6:51am

Devilclarke’s repo works great.
The PN532 is far superior to the MFRC522. I’ve created the code for ESP32 and PN532 using Devilclarke’s lib. This one uses I2C instead of SPI, saving some cables. I’ve not bothered with the array password, since I am not going to use it, but it should be easy to add it. It works a lot better than my MFRC522-code.
My wedge is now working exactly as I want, now I only need to make an eclosure.
If anyone else is using ESP32, feel free to steal and modify:

github.com

erikkt/KeyboardWedge/blob/main/esp32_PN532_wedge


// NFC Tools works good for entering passwords on chip. It's advisable to enter the password as the first NDEF record, 
// if you have more than one record. This increase the chance of finding the password on first try. 
// On ESP32, use GPIO 21 for SDA and GPIO 22 for SCL.
// Keep in mind some special characters, like €, does not seem to be printed correctly with BLEKeyboard.
// Add a LED to GPIO23 and it will light continously while connected to bluetooth, and blink when a password is found.
// It's advisable to add 3.3 kOhm pullups to SDA and SCL lines, due to weak internal ones. 

#include <Wire.h>
#include <PN532_I2C.h>
#include <PN532.h>
#include <NfcAdapter.h>
#include <BleKeyboard.h>
#define LEDPIN 23

BleKeyboard bleKeyboard("ESP32 Wedge");
PN532_I2C pn532_i2c(Wire);
NfcAdapter nfc = NfcAdapter(pn532_i2c);

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