I have connected my Raspberry Pi 3b to a PN532 NFC reader using the I2C interface. I am using the red version 3.0 board. I have set the switches: 1 to on, 2 to off, as according to the table for I2C. I have connected GND, VCC, SDA and SCL correctly, the LED lights up. I have enabled I2C interface on the PI.
With all of that, triple checked, when I run
sudo i2cdetect -y 1 on the PI, it just prints an empty table and doesn't detect the PN532 board.
Am I missing something crucial?