diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile
index 0e9d224be7..d48b20fd38 100755
--- a/ports/nrf/Makefile
+++ b/ports/nrf/Makefile
@@ -100,6 +100,7 @@ SRC_C += \
 	internal_flash.c \
 	mphalport.c \
 	tick.c \
+	board_busses.c \
 	boards/$(BOARD)/board.c \
 	boards/$(BOARD)/pins.c \
 	device/$(MCU_VARIANT)/startup_$(MCU_SUB_VARIANT).c \
diff --git a/ports/nrf/boards/pca10056/mpconfigboard.h b/ports/nrf/boards/pca10056/mpconfigboard.h
index 0f34516022..5aa2191f71 100644
--- a/ports/nrf/boards/pca10056/mpconfigboard.h
+++ b/ports/nrf/boards/pca10056/mpconfigboard.h
@@ -28,11 +28,6 @@
 #define MICROPY_HW_MCU_NAME         "nRF52840"
 #define MICROPY_PY_SYS_PLATFORM     "nRF52840-DK"
 
-// See legend on bottom of board
-#define MICROPY_HW_UART_RX          NRF_GPIO_PIN_MAP(0, 8)
-#define MICROPY_HW_UART_TX          NRF_GPIO_PIN_MAP(0, 6)
-#define MICROPY_HW_UART_HWFC        (0)
-
 #define PORT_HEAP_SIZE              (128 * 1024)
 #define CIRCUITPY_AUTORELOAD_DELAY_MS 500
 
@@ -43,5 +38,5 @@
 #define DEFAULT_SPI_BUS_MOSI        (&pin_P1_13)
 #define DEFAULT_SPI_BUS_MISO        (&pin_P1_14)
 
-#define DEFAULT_UART_BUS_RX         (&pin_P1_01)
-#define DEFAULT_UART_BUS_TX         (&pin_P1_02)
+#define DEFAULT_UART_BUS_RX         (&pin_P0_08)
+#define DEFAULT_UART_BUS_TX         (&pin_P0_06)
diff --git a/ports/nrf/boards/pca10056/pins.c b/ports/nrf/boards/pca10056/pins.c
index 1c208f89b5..a57c9d1c95 100644
--- a/ports/nrf/boards/pca10056/pins.c
+++ b/ports/nrf/boards/pca10056/pins.c
@@ -124,6 +124,8 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_P1_15), MP_ROM_PTR(&pin_P1_15) },
     { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_P1_15) },
     { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_P1_15) },
+
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
 };
 
 MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);