diff --git a/boards/adafruit-metro-m4-express/Makefile.features b/boards/adafruit-metro-m4-express/Makefile.features
index acf8475c3f..12c7dab83d 100644
--- a/boards/adafruit-metro-m4-express/Makefile.features
+++ b/boards/adafruit-metro-m4-express/Makefile.features
@@ -19,3 +19,5 @@ FEATURES_PROVIDED += arduino_pins
 FEATURES_PROVIDED += arduino_shield_isp
 FEATURES_PROVIDED += arduino_shield_uno
 FEATURES_PROVIDED += arduino_spi
+FEATURES_PROVIDED += arduino_i2c
+FEATURES_PROVIDED += arduino_uart
diff --git a/boards/adafruit-metro-m4-express/include/arduino_iomap.h b/boards/adafruit-metro-m4-express/include/arduino_iomap.h
index ea620075d5..c12257e23f 100644
--- a/boards/adafruit-metro-m4-express/include/arduino_iomap.h
+++ b/boards/adafruit-metro-m4-express/include/arduino_iomap.h
@@ -106,10 +106,28 @@ extern "C" {
  * SPI bus.
  */
 #if !MODULE_PERIPH_UART
-#  define ARDUINO_SPI_D11D12D13   SPI_DEV(1)
+#  define ARDUINO_SPI_D11D12D13 SPI_DEV(1)
 #endif
 /** @} */
 
+/**
+ * @name    Arduino's UART devices
+ * @{
+ */
+#define ARDUINO_UART_D0D1       UART_DEV(0)
+/** @} */
+
+/**
+ * @name    Arduino's I2C buses
+ * @{
+ */
+/**
+ * @brief   The first I2C bus is where shields for the Arduino UNO/Mega expect
+ *          it
+ */
+#define ARDUINO_I2C_UNO         I2C_DEV(0)
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif