Hey.
I'm making a school project with Arduino Uno. I bought an NFC reader (seeed Grove NFC). However, I can't get it to read anything. Am I supposed to have an NFC shield? I also find no information online about which pins I should connect the NFC reader to.
Any help greatly appreciated!
The Grove NFC reader can be accessed by I2C or UART. The selection is done by a solder bridge. What did you choose?
Post a wiring diagram (may be hand drawn). Also post the complete code you use for testing.
Hey and thanks for your reply. I took a picture of the solderings I did. I just typed a super long message but it got deleted so I try to make a tighter one fast. Feels frustrating...
Code I used:
#if 0
#include <SPI.h>
#include <PN532_SPI.h>
#include <PN532.h>
#include <NfcAdapter.h>
PN532_SPI pn532spi(SPI, 10);
NfcAdapter nfc = NfcAdapter(pn532spi);
#else
#include <Wire.h>
#include <PN532_I2C.h>
#include <PN532.h>
#include <NfcAdapter.h>
PN532_I2C pn532_i2c(Wire);
NfcAdapter nfc = NfcAdapter(pn532_i2c);
#endif
void setup(void) {
Serial.begin(9600);
Serial.println("NDEF Reader");
nfc.begin();
}
void loop(void) {
Serial.println("\nScan a NFC tag\n");
if (nfc.tagPresent())
{
NfcTag tag = nfc.read();
tag.print();
}
delay(5000);
}
I get the error message "Didn't find PN53x board". Thanks for helping!
Switch to I2C, Run the I2C-scanner program to verify its 'existance'
Aaand the picture..
The picture is unfortunately not very sharp. I can see wires from the solder bridge to some test points but I cannot see soldering on the bridge itself. Can you explain what exactly you soldered. It doesn't look like you actually activated the I2C interface.
