* minor refactor for RAK_4631 SerialInterface

examples/companion_radio/main.cpp

@@ -1399,9 +1399,6 @@ void setup() {
   sprintf(dev_name, "%s%s", BLE_NAME_PREFIX, the_mesh.getNodeName());
   serial_interface.begin(dev_name, the_mesh.getBLEPin());
 #else
-#ifdef RAK_4631
-  pinMode(WB_IO2, OUTPUT);
-#endif
   serial_interface.begin(Serial);
 #endif
   the_mesh.startInterface(serial_interface);

src/helpers/ArduinoSerialInterface.h

@@ -23,7 +23,12 @@ public:
 #ifdef LILYGO_T3S3
   void begin(HWCDC& serial) { _serial = &serial; }
 #elif defined(NRF52_PLATFORM)
-  void begin(Adafruit_USBD_CDC& serial) { _serial = &serial; }
+  void begin(Adafruit_USBD_CDC& serial) {
+    _serial = &serial;
+  #ifdef RAK_4631
+    pinMode(WB_IO2, OUTPUT);
+  #endif
+  }
 #else
   void begin(HardwareSerial& serial) { _serial = &serial; }
 #endif