diff --git a/app/boards/arm/puchi_ble/puchi_ble_v1.dts b/app/boards/arm/puchi_ble/puchi_ble_v1.dts
index 9f3194e036f..67a4c9ac5e6 100644
--- a/app/boards/arm/puchi_ble/puchi_ble_v1.dts
+++ b/app/boards/arm/puchi_ble/puchi_ble_v1.dts
@@ -66,6 +66,7 @@
 
 &uart0 {
     compatible = "nordic,nrf-uarte";
+    current-speed = <115200>;
     pinctrl-0 = <&uart0_default>;
     pinctrl-1 = <&uart0_sleep>;
     pinctrl-names = "default", "sleep";
diff --git a/app/boards/blackpill_f401cc.overlay b/app/boards/blackpill_f401cc.overlay
index 6ed4c3cf844..a9b5c1bed24 100644
--- a/app/boards/blackpill_f401cc.overlay
+++ b/app/boards/blackpill_f401cc.overlay
@@ -48,3 +48,5 @@
 blackpill_i2c: &i2c1 {};
 blackpill_spi: &spi1 {};
 blackpill_serial: &usart1 {};
+
+&blackpill_serial { status = "disabled"; };
diff --git a/app/boards/blackpill_f401ce.overlay b/app/boards/blackpill_f401ce.overlay
index 54e360a393e..3672c6b3778 100644
--- a/app/boards/blackpill_f401ce.overlay
+++ b/app/boards/blackpill_f401ce.overlay
@@ -49,3 +49,5 @@
 blackpill_i2c: &i2c1 {};
 blackpill_spi: &spi1 {};
 blackpill_serial: &usart1 {};
+
+&blackpill_serial { status = "disabled"; };
diff --git a/app/boards/blackpill_f411ce.overlay b/app/boards/blackpill_f411ce.overlay
index 54e360a393e..3672c6b3778 100644
--- a/app/boards/blackpill_f411ce.overlay
+++ b/app/boards/blackpill_f411ce.overlay
@@ -49,3 +49,5 @@
 blackpill_i2c: &i2c1 {};
 blackpill_spi: &spi1 {};
 blackpill_serial: &usart1 {};
+
+&blackpill_serial { status = "disabled"; };
diff --git a/app/boards/shields/ergodash/ergodash.dtsi b/app/boards/shields/ergodash/ergodash.dtsi
index b6ef7fc41c2..c313c3a1672 100644
--- a/app/boards/shields/ergodash/ergodash.dtsi
+++ b/app/boards/shields/ergodash/ergodash.dtsi
@@ -57,5 +57,14 @@ RC(4,0) RC(4,1) RC(4,2) RC(4,3) RC(4,4)         RC(4,5) RC(4,6) RC(4,13) RC(4,12
             , <&pro_micro 16 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
             ;
     };
+
+    wired_split {
+        compatible = "zmk,wired-split";
+        device = <&pro_micro_serial>;
+    };
+};
+
+&pro_micro_serial {
+    status = "okay";
 };
 
diff --git a/app/boards/shields/nice_view_adapter/boards/bluemicro840_v1.overlay b/app/boards/shields/nice_view_adapter/boards/bluemicro840_v1.overlay
index 706cffbebea..4f0b3009ff7 100644
--- a/app/boards/shields/nice_view_adapter/boards/bluemicro840_v1.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/bluemicro840_v1.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/mikoto.overlay b/app/boards/shields/nice_view_adapter/boards/mikoto.overlay
index e00b599c61c..67770abb17d 100644
--- a/app/boards/shields/nice_view_adapter/boards/mikoto.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/mikoto.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/nice_nano.overlay b/app/boards/shields/nice_view_adapter/boards/nice_nano.overlay
index 45ba34dedeb..77ec56bea01 100644
--- a/app/boards/shields/nice_view_adapter/boards/nice_nano.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/nice_nano.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/nice_nano_v2.overlay b/app/boards/shields/nice_view_adapter/boards/nice_nano_v2.overlay
index 45ba34dedeb..77ec56bea01 100644
--- a/app/boards/shields/nice_view_adapter/boards/nice_nano_v2.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/nice_nano_v2.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/nrfmicro_11.overlay b/app/boards/shields/nice_view_adapter/boards/nrfmicro_11.overlay
index 706cffbebea..4f0b3009ff7 100644
--- a/app/boards/shields/nice_view_adapter/boards/nrfmicro_11.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/nrfmicro_11.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/nrfmicro_11_flipped.overlay b/app/boards/shields/nice_view_adapter/boards/nrfmicro_11_flipped.overlay
index 5b5dbfb1c3b..b39e3c0a5a7 100644
--- a/app/boards/shields/nice_view_adapter/boards/nrfmicro_11_flipped.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/nrfmicro_11_flipped.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/nrfmicro_13.overlay b/app/boards/shields/nice_view_adapter/boards/nrfmicro_13.overlay
index 706cffbebea..4f0b3009ff7 100644
--- a/app/boards/shields/nice_view_adapter/boards/nrfmicro_13.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/nrfmicro_13.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/app/boards/shields/nice_view_adapter/boards/puchi_ble_v1.overlay b/app/boards/shields/nice_view_adapter/boards/puchi_ble_v1.overlay
index 706cffbebea..4f0b3009ff7 100644
--- a/app/boards/shields/nice_view_adapter/boards/puchi_ble_v1.overlay
+++ b/app/boards/shields/nice_view_adapter/boards/puchi_ble_v1.overlay
@@ -33,3 +33,7 @@ nice_view_spi: &spi0 {
 &pro_micro_i2c {
     status = "disabled";
 };
+
+&pro_micro_serial {
+    status = "disabled";
+};
diff --git a/docs/docs/development/hardware-integration/new-shield.mdx b/docs/docs/development/hardware-integration/new-shield.mdx
index 1cbc079d96b..96d9109046f 100644
--- a/docs/docs/development/hardware-integration/new-shield.mdx
+++ b/docs/docs/development/hardware-integration/new-shield.mdx
@@ -530,9 +530,19 @@ If testing the experimental [wired split](../../features/split-keyboards.md) sup
 };
 ```
 
-See the [wired split](../../config/split.md#wired-split) configuration for more details.
+Your shield should also ensure that the UART device used in `zmk,wired-split` is enabled, as we disable the predefined UART devices by default.
 
-For wireless split keyboards, this step should be skipped, especially since the UART pins on your controller might already be in use for other functionality.
+```dts
+&pro_micro_serial {
+    status = "okay";
+};
+```
+
+Note that enabling the UART device will prevent its pins from being used for any other purpose. For split shields to be used by both BLE-capable and BLE-incapable boards, you should setup the wired split. If a BLE-capable board is selected, the split interconnect will default to BLE, otherwise it will fall back to the wired split transport.
+If you have an optional hardware add-on that makes use of the UART pins when used wirelessly, define said add-on in a separate shield and have that shield disable the UART device.
+The in-tree `nice_view_adapter` is an example of such a shield, disabling the UART device so that one of the pins can be used for SPI instead.
+
+See the [wired split](../../config/split.md#wired-split) configuration for more details.
 
 </TabItem>
 </SplitTabs>