extends Control

# Part 1 — the minimal round trip: a Godot button that toggles an LED on the
# Arduino. Only the OUTBOUND (command) half of the link is used here; Part 2
# adds inbound telemetry from the joystick.

const COMMAND_ADDR := "127.0.0.1"
const COMMAND_PORT := 4243

@onready var led_button: Button = $Panel/LedButton

var _udp_out := PacketPeerUDP.new()
var _led_on := false

func _ready() -> void:
	# To SEND with PacketPeerUDP in Godot 4, use set_dest_address — NOT
	# connect_to_host, which is for receiving and silently drops outbound packets.
	_udp_out.set_dest_address(COMMAND_ADDR, COMMAND_PORT)
	led_button.pressed.connect(_on_led_pressed)

func _on_led_pressed() -> void:
	_led_on = not _led_on
	_udp_out.put_packet(("L1" if _led_on else "L0").to_utf8_buffer())
	led_button.text = "LED: ON" if _led_on else "LED: OFF"