diff --git a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts
index 9e4acb819a45..4b02a392c10e 100644
--- a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts
+++ b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts
@@ -63,6 +63,11 @@
 			pinmux = <ULPUART_RX_ULP9>;
 		};
 	};
+	ulpi2c_default: ulpi2c_default {
+		group {
+			pinmux = <ULPI2C_SDA_ULP6>, <ULPI2C_SCL_ULP7>;
+		};
+	};
 };
 
 &dma0 {
@@ -79,6 +84,18 @@
 	pinctrl-names = "default";
 };
 
+&ulpi2c {
+	status = "okay";
+	pinctrl-0 = <&ulpi2c_default>;
+	pinctrl-names = "default";
+	clock-frequency = <DT_FREQ_K(100)>;
+
+	si7021: si7021@40 {
+		compatible = "silabs,si7006";
+		reg = <0x40>;
+	};
+};
+
 &flash0 {
 	partitions {
 		compatible = "fixed-partitions";
@@ -98,4 +115,4 @@
 
 &wifi0 {
 	status = "okay";
-};
\ No newline at end of file
+};
diff --git a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig
index 16809caaba3e..8cfaa4e5ab33 100644
--- a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig
+++ b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig
@@ -10,8 +10,10 @@ CONFIG_PINCTRL=y
 CONFIG_GPIO=y
 CONFIG_CLOCK_CONTROL=y
 CONFIG_DMA=y
+CONFIG_I2C=y
 CONFIG_ENTROPY_GENERATOR=y
 CONFIG_FLASH=y
+CONFIG_SENSOR=y
 CONFIG_BT=y
 CONFIG_BT_HCI=y
 CONFIG_NETWORKING=y