Refactor mcu code. Closes #11

src/Config.h

@@ -0,0 +1,40 @@
+#pragma once
+#include <Arduino.h>
+
+// ─── Motor pin mapping (28BYJ-48 / ULN2003) ──────────────────────
+// Motor 1 – Shoulder
+#define M1_IN1 0
+#define M1_IN2 1
+#define M1_IN3 3
+#define M1_IN4 4
+
+// Motor 2 – Elbow
+#define M2_IN1 5
+#define M2_IN2 6
+#define M2_IN3 7
+#define M2_IN4 10
+
+// ─── Stepper constants ────────────────────────────────────────────
+#define STEPS_PER_REV 2048
+#define DEFAULT_SPEED 600.0f
+#define DEFAULT_ACCEL 100.0f
+#define IDLE_TIMEOUT_MS (30 * 60 * 1000)
+#define NOTIFY_INTERVAL_MS 200
+
+// ─── BLE Constants ────────────────────────────────────────────────
+#define DEVICE_NAME "WijiBoard"
+#define SERVICE_UUID "18f3b235-9831-4c75-8ec0-210469b820a0"
+#define CMD_UUID "cd083b06-4447-4cf3-a7c3-322ecf802ce4"
+#define STATUS_UUID "82e38c5b-d3ab-41d1-861c-b84dc6bb1e03"
+
+// ─── LED Definitions ──────────────────────────────────────────────
+#ifndef STATUS_LED_PIN
+  #ifdef LED_BUILTIN
+    #define STATUS_LED_PIN LED_BUILTIN
+  #endif
+#endif
+
+#ifndef STATUS_LED_ON
+  #define STATUS_LED_ON HIGH
+  #define STATUS_LED_OFF LOW
+#endif