Hi,
I’ve looked into the layout of the NFC board, and from what I’ve seen this is the problem:
The solder-jumper P1 is always connected to UART (meaning GND) and ‘SEL0’
The NFC chip has 3 modes of communication, switched by the SEL0 and SEL1 level.
The correct usage is found here: www(dot)nxp(dot)com/documents/user_manual/141520.pdf (not allowed to post links -.-)
UART SEL0 0 | SEL1 0
SPI SEL0 0 | SEL1 1
I2C SEL0 1 | SEL1 0
So to be able to use I2C it is necessary to somehow unconnect the UART pad from the P1 jumper and then solder the jumper to the I2C pad.
Can someone confirm on that please?
Regards,
Chris