commit b89e7087569d3ed0075d3fe1636dd1e09dacfc35
Author: Emil Miler <em@0x45.cz>
Date:   Wed Dec 13 17:30:14 2023 +0100

    Commit local files

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..66fc7a3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.pio/
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..b57208c
--- /dev/null
+++ b/makefile
@@ -0,0 +1,18 @@
+PROJECT_DIR = $(CURDIR)
+PLATFORMIO_BIN = /bin/pio
+
+all: build upload
+
+build:
+	$(PLATFORMIO_BIN) run -d $(PROJECT_DIR)
+
+upload:
+	$(PLATFORMIO_BIN) run -d $(PROJECT_DIR) -t upload
+
+clean:
+	$(PLATFORMIO_BIN) run -d $(PROJECT_DIR) -t clean
+
+monitor:
+	$(PLATFORMIO_BIN) device monitor
+
+.PHONY: all build upload clean monitor
diff --git a/platformio.ini b/platformio.ini
new file mode 100644
index 0000000..4e17fac
--- /dev/null
+++ b/platformio.ini
@@ -0,0 +1,10 @@
+[env:uno]
+platform = atmelavr
+board = uno
+framework = arduino
+upload_port = /dev/ttyUSB0
+monitor_speed = 9600
+
+lib_deps =
+		SPI
+		miguelbalboa/MFRC522@^1.4.10
diff --git a/src/main.ino b/src/main.ino
new file mode 100644
index 0000000..235a817
--- /dev/null
+++ b/src/main.ino
@@ -0,0 +1,35 @@
+#include <SPI.h>
+#include <MFRC522.h>
+
+#define SS_PIN 10
+#define RST_PIN 5
+#define LED_PIN_Y 3
+#define LED_PIN_N 2
+const byte uid[4] = {0xF9, 0x7E, 0x9D, 0x2B};
+
+MFRC522 rfid(SS_PIN, RST_PIN);
+
+void setup() {
+	SPI.begin();
+	rfid.PCD_Init();
+	pinMode(LED_PIN_Y, OUTPUT);
+	pinMode(LED_PIN_N, OUTPUT);
+}
+
+void loop() {
+	if (rfid.PICC_IsNewCardPresent()) {
+		if (rfid.PICC_ReadCardSerial()) {
+			for (int i = 0; i < rfid.uid.size; i++) {
+				if (rfid.uid.uidByte[i] == uid[i]) {
+					digitalWrite(LED_PIN_Y, HIGH);
+					delay(500);
+					digitalWrite(LED_PIN_Y, LOW);
+				} else {
+					digitalWrite(LED_PIN_N, HIGH);
+					delay(500);
+					digitalWrite(LED_PIN_N, LOW);
+				}
+			}
+		}
+	}
+}