diff --git a/README.md b/README.md
index 339fc86..6774714 100644
--- a/README.md
+++ b/README.md
@@ -17,3 +17,11 @@ west build -b nrf5340_audio_dk_nrf5340_cpuapp -- -DEXTRA_DTC_OVERLAY_FILE=uart1.
 ```sh
 west build -b nrf5340_audio_dk_nrf5340_cpuapp -- -DEXTRA_DTC_OVERLAY_FILE=uart1.overlay -DOVERLAY_CONFIG=debug.conf
 ```
+# pinout for nrf5340_audio_dk for uart1
+
+| PIN | Arduino |  nrf  |
+|:---:|:-------:|:-----:|
+|  TX |    D0   | P1.09 |
+|  RX |    D1   | P1.08 |
+| RTS |    D7   | P1.11 |
+| CTS |    D8   | P1.10 |
diff --git a/boards/nrf5340dk_nrf5340_cpuapp.overlay b/boards/nrf5340dk_nrf5340_cpuapp.overlay
index 6a4b799..2e8eda2 100644
--- a/boards/nrf5340dk_nrf5340_cpuapp.overlay
+++ b/boards/nrf5340dk_nrf5340_cpuapp.overlay
@@ -1,5 +1,16 @@
 /* SPDX-License-Identifier: Apache-2.0 */
 
+/ {
+    host_interface {
+        compatible = "gpio-outputs";
+        status = "okay";
+        timesync: pin_0 {
+		    gpios = <&arduino_header 10 GPIO_ACTIVE_HIGH>;
+            label = "Controller to host timesync pin";
+        };
+    };
+};
+
 &uart0 {
 	compatible = "nordic,nrf-uarte";
 	current-speed = <1000000>;
diff --git a/uart1.overlay b/uart1.overlay
index 7c8706f..dd62084 100644
--- a/uart1.overlay
+++ b/uart1.overlay
@@ -6,6 +6,7 @@
 &uart1 {
     status = "okay";
     current-speed = <1000000>;
+    hw-flow-control;
 };
 
 / {