all the wires connected as the code says, but still miscommunication. Using this code: ```
-
- Example sketch/program showing how to read data from a PICC to serial.
-
- This is a MFRC522 library example; for further details and other examples see: GitHub - miguelbalboa/rfid: Arduino RFID Library for MFRC522
- Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
- Reader on the Arduino SPI interface.
- When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
- then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
- you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
- will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
- when removing the PICC from reading distance too early.
- If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
- So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
- details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
- keep the PICCs at reading distance until complete.
- @license Released into the public domain.
- Typical pin layout used:
-
-
MFRC522 Arduino Arduino Arduino Arduino Arduino -
Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro - Signal Pin Pin Pin Pin Pin Pin
-
- RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
- SPI SS SDA(SS) 10 53 D10 10 10
- SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
- SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
- SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
- More pin layouts for other boards can be found here: GitHub - miguelbalboa/rfid: Arduino RFID Library for MFRC522
*/
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522
delay(4); // Optional delay. Some board do need more time after init to be ready, see Readme
mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD - MFRC522 Card Reader details
Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
}
void loop() {
// Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
if ( ! mfrc522.PICC_IsNewCardPresent()) {
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial()) {
return;
}
// Dump debug info about the card; PICC_HaltA() is automatically called
mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
}```
what else could be the problem?