diff --git a/src/Arduino_10BASE_T1S.h b/src/Arduino_10BASE_T1S.h
index 8a60479..8f1d1a3 100644
--- a/src/Arduino_10BASE_T1S.h
+++ b/src/Arduino_10BASE_T1S.h
@@ -46,6 +46,11 @@ static int const IRQ_PIN   =  2;
 static int const CS_PIN    =  PinNameToIndex(PH_6);
 static int const RESET_PIN =  PinNameToIndex(PJ_11);
 static int const IRQ_PIN   =  PinNameToIndex(PC_7);
+#elif defined(ARDUINO_PORTENTA_C33)
+/* Pro Demo kit on MID carrier, UNO form factor */
+static int const CS_PIN    =  25;
+static int const RESET_PIN =  4;
+static int const IRQ_PIN   =  2;
 #else
 # error "No pins defined for your board"
 #endif
diff --git a/src/MacAddress.cpp b/src/MacAddress.cpp
index 4cf6e57..e284d9c 100644
--- a/src/MacAddress.cpp
+++ b/src/MacAddress.cpp
@@ -82,24 +82,10 @@ void get_unique_chip_id_3(uint8_t * uid)
     uint32_t const samd_uid = *(volatile uint32_t*)(0x0080A048);
     memcpy(uid, &samd_uid, 3);
   }
-#elif defined(ARDUINO_MINIMA) || defined(ARDUINO_UNOWIFIR4)
+#elif defined(ARDUINO_MINIMA) || defined(ARDUINO_UNOWIFIR4) || defined(ARDUINO_PORTENTA_C33)
   {
-    #define BSP_FEATURE_BSP_MCU_INFO_POINTER_LOCATION            (0x407FB19C)
-    #define BSP_FEATURE_BSP_UNIQUE_ID_OFFSET                     (0x14)
-    #define BSP_FEATURE_BSP_UNIQUE_ID_POINTER                    ((*(uint32_t *) BSP_FEATURE_BSP_MCU_INFO_POINTER_LOCATION) \
-                                                                  +                                                         \
-                                                                  BSP_FEATURE_BSP_UNIQUE_ID_OFFSET)
-    typedef struct st_bsp_unique_id
-    {
-      union
-      {
-        uint32_t unique_id_words[4];
-        uint8_t  unique_id_bytes[16];
-      };
-    } bsp_unique_id_t;
-
-    bsp_unique_id_t const * renesas_unique_id = (bsp_unique_id_t *) BSP_FEATURE_BSP_UNIQUE_ID_POINTER;
-    memcpy(uid, renesas_unique_id->unique_id_bytes, 3);
+    const bsp_unique_id_t* t = R_BSP_UniqueIdGet();
+    memcpy(uid, t->unique_id_bytes, 3);
   }
 #elif defined(ARDUINO_GIGA) || defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_PORTENTA_H7_M4)
   {
@@ -113,4 +99,10 @@ void get_unique_chip_id_3(uint8_t * uid)
 #else
 # error "Retrieving a unique chip ID for MAC generation is not supported on this platform."
 #endif
-}
\ No newline at end of file
+}
+
+#if defined(ARDUINO_PORTENTA_C33)
+extern "C" int LWIP_RAND() {
+  return rand();
+}
+#endif
\ No newline at end of file