fixed endpoint name to have Contiki-NG as prefix
#ifndef LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX
#ifdef LWM2M_DEVICE_MODEL_NUMBER
-#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX LWM2M_DEVICE_MODEL_NUMBER
+#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-NG-"LWM2M_DEVICE_MODEL_NUMBER
#else /* LWM2M_DEVICE_MODEL_NUMBER */
-#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-"
+#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-NG"
#endif /* LWM2M_DEVICE_MODEL_NUMBER */
#endif /* LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX */
