Added basic mod structure

src/main/java/me/jonasjones/arduinoctrls/ArduinoControls.java

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+package me.jonasjones.arduinoctrls;
+
+import me.jonasjones.arduinoctrls.debug.LedBlink;
+import net.fabricmc.api.ModInitializer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ArduinoControls implements ModInitializer {
+	// This logger is used to write text to the console and the log file.
+	// It is considered best practice to use your mod id as the logger's name.
+	// That way, it's clear which mod wrote info, warnings, and errors.
+	public static final Logger LOGGER = LoggerFactory.getLogger("arduinoctrls");
+
+	@Override
+	public void onInitialize() {
+		// This code runs as soon as Minecraft is in a mod-load-ready state.
+		// However, some things (like resources) may still be uninitialized.
+		// Proceed with mild caution.
+
+		LOGGER.info("UwU from Arduino Controls!");
+		try {
+			LedBlink.initialisation();
+		} catch (InterruptedException e) {
+			throw new RuntimeException(e);
+		}
+	}
+}

src/main/java/me/jonasjones/arduinoctrls/debug/LedBlink.java

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+package me.jonasjones.arduinoctrls.debug;
+
+import arduino.Arduino;
+import me.jonasjones.arduinoctrls.ArduinoControls;
+
+public class LedBlink {
+    public static void initialisation() throws InterruptedException {
+
+        //do portscan
+        //String port = (new SPortScan()).getActivePort();
+        String port = "/dev/ttyUSB0";
+        //establish connection to Ardiuno
+        Arduino ArduinoCon = new Arduino(port, 9600);
+        boolean isOn = true; //Led state off
+        String[] commands = {"turnOff", "turnOn"}; //commands for Arduino
+
+        ArduinoCon.openConnection();
+        Thread.sleep(4000);
+        ArduinoCon.serialWrite(commands[1]);
+        Thread.sleep(1000);
+        ArduinoCon.serialWrite(commands[0]);
+        Thread.sleep(1000);
+        ArduinoCon.serialWrite(commands[1]);
+        Thread.sleep(1000);
+        ArduinoCon.serialWrite(commands[0]);
+        ArduinoCon.closeConnection();
+    }
+
+    public static boolean blink(Arduino ArduinoCon, String[] commands, boolean isOn) throws InterruptedException {
+        ArduinoCon.openConnection();
+        Thread.sleep(4000);
+        isOn = !isOn;
+        if (isOn) {
+            ArduinoCon.serialWrite(commands[1]);
+        } else {
+            ArduinoCon.serialWrite(commands[0]);
+        }
+        ArduinoCon.closeConnection();
+        return isOn;
+    }
+
+
+
+
+
+
+
+}

src/main/java/me/jonasjones/arduinoctrls/debug/SPortScan.java

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+package me.jonasjones.arduinoctrls.debug;
+
+import java.util.Enumeration;
+
+import gnu.io.*;
+import me.jonasjones.arduinoctrls.ArduinoControls;
+
+public class SPortScan {
+    private String activePort;
+
+    public SPortScan(){
+        CommPortIdentifier serialPortId;
+
+        Enumeration enumComm;
+
+        enumComm = CommPortIdentifier.getPortIdentifiers(); // get active ports
+        ArduinoControls.LOGGER.info("Found Ports: " + enumComm.toString());
+
+        /*
+            go throught ports and identify the serial
+         */
+        while(enumComm.hasMoreElements())
+        {
+            serialPortId = (CommPortIdentifier) enumComm.nextElement(); // get next one
+            if(serialPortId.getPortType() == CommPortIdentifier.PORT_SERIAL) // check if is serial type
+            {
+                this.activePort = (String) serialPortId.getName();
+            }
+        }
+    }
+
+    public String getActivePort(){
+        return this.activePort;
+    }
+}

src/main/java/me/jonasjones/arduinoctrls/mixin/ArduinoMixin.java

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+package me.jonasjones.arduinoctrls.mixin;
+
+import me.jonasjones.arduinoctrls.ArduinoControls;
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.screen.TitleScreen;
+import net.minecraft.client.gui.widget.ButtonWidget;
+import net.minecraft.text.Text;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(TitleScreen.class)
+public abstract class ArduinoMixin extends Screen {
+	protected ArduinoMixin(Text title) {
+		super(title);
+	}
+
+	@Inject(at = @At("HEAD"), method = "init()V")
+	private void init(CallbackInfo info) {
+		ArduinoControls.LOGGER.info("This line is printed by an example mod mixin!");
+	}
+
+	@Inject(at = @At("RETURN"), method = "initWidgetsNormal")
+	private void ledToggleButton(int y, int spacingY, CallbackInfo ci) {
+		this.addDrawableChild(new ButtonWidget(50, 50, 20, 20,Text.of("LED"), (button) -> {
+			this.client.scheduleStop();
+		}));
+	}
+}