From 68f7e6027cf446c8dd0dbe0804a02d1094afbb5a Mon Sep 17 00:00:00 2001
From: Alexander Popov <iiiypuk@fastmail.fm>
Date: Sun, 4 Jun 2023 18:27:50 +0300
Subject: [PATCH] rfid

---
 RFID-RC522/README.md      |  3 +++
 RFID-RC522/RFID-RC522.ino | 46 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 RFID-RC522/README.md
 create mode 100644 RFID-RC522/RFID-RC522.ino

diff --git a/RFID-RC522/README.md b/RFID-RC522/README.md
new file mode 100644
index 0000000..dc99c66
--- /dev/null
+++ b/RFID-RC522/README.md
@@ -0,0 +1,3 @@
+## Library
+
+- [MFRC522](https://github.com/miguelbalboa/rfid)
diff --git a/RFID-RC522/RFID-RC522.ino b/RFID-RC522/RFID-RC522.ino
new file mode 100644
index 0000000..ac171bb
--- /dev/null
+++ b/RFID-RC522/RFID-RC522.ino
@@ -0,0 +1,46 @@
+/**
+ * ...
+ *
+ * Author: Alexander Popov
+ * License: Unlicense
+ */
+
+#include <SPI.h>
+#include <MFRC522.h>
+
+#define SS_PIN  7
+#define RST_PIN 9
+
+MFRC522 rfid(SS_PIN, RST_PIN);
+
+void setup() {
+  Serial.begin(9600);
+  SPI.begin();
+  rfid.PCD_Init();
+
+  Serial.println("Tap RFID/NFC Tag on reader.");
+}
+
+void loop() {
+  // new tag is available
+  if (rfid.PICC_IsNewCardPresent()) {
+    // NUID has been readed
+    if (rfid.PICC_ReadCardSerial()) {
+      MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
+
+      Serial.print("RFID/NFC Tag Type: ");
+      Serial.println(rfid.PICC_GetTypeName(piccType));
+
+      // print NUID in Serial Monitor in the hex format
+      Serial.print("UID:");
+      for (int i = 0; i < rfid.uid.size; i++) {
+        Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");
+        Serial.print(rfid.uid.uidByte[i], HEX);
+      }
+      Serial.println();
+
+      rfid.PICC_HaltA(); // halt PICC
+      rfid.PCD_StopCrypto1(); // stop encryption on PCD
+    }
+  }
+}