diff --git a/ports/espressif/boards/microdev_micro_c3/mpconfigboard.h b/ports/espressif/boards/microdev_micro_c3/mpconfigboard.h
index 6e2bf9d7b8..97a18f3235 100644
--- a/ports/espressif/boards/microdev_micro_c3/mpconfigboard.h
+++ b/ports/espressif/boards/microdev_micro_c3/mpconfigboard.h
@@ -25,26 +25,31 @@
  */
 
 // Board setup
-#define MICROPY_HW_BOARD_NAME       "MicroDev microC3"
-#define MICROPY_HW_MCU_NAME         "ESP32-C3FN4"
+#define MICROPY_HW_BOARD_NAME           "MicroDev microC3"
+#define MICROPY_HW_MCU_NAME             "ESP32-C3FN4"
 
 // Status LEDs
-#define MICROPY_HW_NEOPIXEL         (&pin_GPIO7)
-#define MICROPY_HW_NEOPIXEL_COUNT   (2)
+#define MICROPY_HW_NEOPIXEL             (&pin_GPIO7)
+#define MICROPY_HW_NEOPIXEL_COUNT       (2)
 
-#define MICROPY_HW_LED_STATUS (&pin_GPIO8)
+#define MICROPY_HW_LED_STATUS           (&pin_GPIO8)
 
 // Default bus pins
-#define DEFAULT_I2C_BUS_SCL         (&pin_GPIO4)
-#define DEFAULT_I2C_BUS_SDA         (&pin_GPIO5)
+#define DEFAULT_I2C_BUS_SCL             (&pin_GPIO4)
+#define DEFAULT_I2C_BUS_SDA             (&pin_GPIO5)
 
-#define DEFAULT_SPI_BUS_SCK         (&pin_GPIO1)
-#define DEFAULT_SPI_BUS_MOSI        (&pin_GPIO2)
-#define DEFAULT_SPI_BUS_MISO        (&pin_GPIO3)
+#define DEFAULT_SPI_BUS_SCK             (&pin_GPIO1)
+#define DEFAULT_SPI_BUS_MOSI            (&pin_GPIO2)
+#define DEFAULT_SPI_BUS_MISO            (&pin_GPIO3)
 
-#define DEFAULT_UART_BUS_RX         (&pin_GPIO20)
-#define DEFAULT_UART_BUS_TX         (&pin_GPIO21)
+#define DEFAULT_UART_BUS_RX             (&pin_GPIO20)
+#define DEFAULT_UART_BUS_TX             (&pin_GPIO21)
 
-// Serial over UART
-#define CIRCUITPY_CONSOLE_UART_RX     DEFAULT_UART_BUS_RX
-#define CIRCUITPY_CONSOLE_UART_TX     DEFAULT_UART_BUS_TX
+// For REPL over built-in USB Serial
+#define CIRCUITPY_ESP_USB_SERIAL_JTAG   (1)
+
+// For entering safe mode
+#define CIRCUITPY_BOOT_BUTTON           (&pin_GPIO9)
+
+// Explanation of how a user got into safe mode
+#define BOARD_USER_SAFE_MODE_ACTION translate("pressing boot button at start up.\n")
diff --git a/ports/espressif/boards/microdev_micro_c3/mpconfigboard.mk b/ports/espressif/boards/microdev_micro_c3/mpconfigboard.mk
index ce431624ae..646522db8d 100644
--- a/ports/espressif/boards/microdev_micro_c3/mpconfigboard.mk
+++ b/ports/espressif/boards/microdev_micro_c3/mpconfigboard.mk
@@ -5,6 +5,6 @@ IDF_TARGET = esp32c3
 
 INTERNAL_FLASH_FILESYSTEM = 1
 
-CIRCUITPY_ESP_FLASH_MODE = qio
+CIRCUITPY_ESP_FLASH_MODE = dio
 CIRCUITPY_ESP_FLASH_FREQ = 80m
 CIRCUITPY_ESP_FLASH_SIZE = 4MB
diff --git a/ports/espressif/boards/microdev_micro_c3/sdkconfig b/ports/espressif/boards/microdev_micro_c3/sdkconfig
index f6f038a77c..6674dbfb90 100644
--- a/ports/espressif/boards/microdev_micro_c3/sdkconfig
+++ b/ports/espressif/boards/microdev_micro_c3/sdkconfig
@@ -1,5 +1,70 @@
+# Automatically generated file. DO NOT EDIT.
+# Espressif IoT Development Framework (ESP-IDF) Project Configuration
+#
+# Bootloader config
+#
+CONFIG_BOOTLOADER_LOG_LEVEL_NONE=y
+# CONFIG_BOOTLOADER_LOG_LEVEL_INFO is not set
+CONFIG_BOOTLOADER_LOG_LEVEL=0
+# end of Bootloader config
+
+#
+# Serial flasher config
+#
+# CONFIG_ESPTOOLPY_FLASHFREQ_26M is not set
+# end of Serial flasher config
+
+#
+# Partition Table
+#
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="esp-idf-config/partitions-4MB-no-uf2.csv"
+CONFIG_PARTITION_TABLE_FILENAME="esp-idf-config/partitions-4MB-no-uf2.csv"
+# end of Partition Table
+
+#
+# Compiler options
+#
+# CONFIG_COMPILER_SAVE_RESTORE_LIBCALLS is not set
+# end of Compiler options
+
+#
+# Component config
+#
+#
+
+#
+# PHY
+#
+CONFIG_ESP_PHY_ENABLE_USB=y
+# end of PHY
+
+#
+# ESP System Settings
+#
+# CONFIG_ESP_SYSTEM_USE_EH_FRAME is not set
+CONFIG_ESP_CONSOLE_SECONDARY_NONE=y
+# CONFIG_ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG is not set
+# CONFIG_ESP_DEBUG_STUBS_ENABLE is not set
+# end of ESP System Settings
+
 #
 # LWIP
 #
 CONFIG_LWIP_LOCAL_HOSTNAME="MicroDev-microC3"
 # end of LWIP
+
+#
+# SPI Flash driver
+#
+# CONFIG_SPI_FLASH_AUTO_SUSPEND is not set
+# end of SPI Flash driver
+
+# end of Component config
+
+#
+# Deprecated options for backward compatibility
+#
+# CONFIG_LOG_BOOTLOADER_LEVEL_INFO is not set
+CONFIG_LOG_BOOTLOADER_LEVEL=0
+# CONFIG_COMPILER_OPTIMIZATION_LEVEL_DEBUG is not set
+# end of Deprecated options for backward compatibility