diff --git a/docs/common/dev/_pico-uart.mdx b/docs/common/dev/_pico-uart.mdx
index 8ebcafd2e..972e528f8 100644
--- a/docs/common/dev/_pico-uart.mdx
+++ b/docs/common/dev/_pico-uart.mdx
@@ -107,9 +107,7 @@ make -j$(nproc)
 
 - 终端输入以下命令，查看串口输出
 
-```bash
-sudo minicom -D /dev/ttyS4 -b 115200
-```
+<pre>sudo minicom -D /dev/{props.tty_num} -b 115200</pre>
 
 - 验证
 
diff --git a/docs/x/x2l/software-development/c_sdk_examples.md b/docs/x/x2l/software-development/c_sdk_examples.md
index 2540a5cd4..b96c61da6 100644
--- a/docs/x/x2l/software-development/c_sdk_examples.md
+++ b/docs/x/x2l/software-development/c_sdk_examples.md
@@ -32,7 +32,7 @@ import UART from "../../../common/dev/\_pico-uart.mdx";
 
 <PWM flash_url="./flash" product_name="Radxa X2L" led_pin="PIN_5" />
 
-<UART />
+<UART flash_url="./flash" tty_num="ttyS0"/>
 
 #### CPU 通过 UART 来控制 RP2040 的 40-PIN GPIO
 
diff --git a/docs/x/x4/software/c_sdk_examples.md b/docs/x/x4/software/c_sdk_examples.md
index d3b0e6734..f4d1215ab 100644
--- a/docs/x/x4/software/c_sdk_examples.md
+++ b/docs/x/x4/software/c_sdk_examples.md
@@ -42,7 +42,7 @@ import INTEL_UART from "../../../common/dev/\_pico-gpio-controlled-by-intel.mdx"
        <PoE flash_url="./flash" product_name="Radxa X4" poe_name="瑞莎 25W PoE+ HAT X4 专用款" poe_img="/img/x/x4/25w_poe_plus_for_x4_04.webp" />
     </TabItem>
      <TabItem value="UART">
-      <UART flash_url="./flash" />
+      <UART flash_url="./flash" tty_num="ttyS4" />
     </TabItem>
 </Tabs>
 
diff --git a/i18n/en/docusaurus-plugin-content-docs/current/common/dev/_pico-uart.mdx b/i18n/en/docusaurus-plugin-content-docs/current/common/dev/_pico-uart.mdx
index 22106b333..c9c8d9e0e 100644
--- a/i18n/en/docusaurus-plugin-content-docs/current/common/dev/_pico-uart.mdx
+++ b/i18n/en/docusaurus-plugin-content-docs/current/common/dev/_pico-uart.mdx
@@ -107,9 +107,7 @@ After successful compilation, a file named hello_uart.uf2 will be created in the
 
 - Enter the following command in the terminal to view the serial port output
 
-```bash
-sudo minicom -D /dev/ttyS4 -b 115200
-```
+<pre>sudo minicom -D /dev/{props.tty_num} -b 115200</pre>
 
 - Verification
 
diff --git a/i18n/en/docusaurus-plugin-content-docs/current/x/x2l/software-development/c_sdk_examples.md b/i18n/en/docusaurus-plugin-content-docs/current/x/x2l/software-development/c_sdk_examples.md
index e8b3dc083..a73a8e4cd 100644
--- a/i18n/en/docusaurus-plugin-content-docs/current/x/x2l/software-development/c_sdk_examples.md
+++ b/i18n/en/docusaurus-plugin-content-docs/current/x/x2l/software-development/c_sdk_examples.md
@@ -32,7 +32,7 @@ In order to operate the IO resources on RP2040, we need a complete software envi
 
 <PWM flash_url="./flash" product_name="Radxa X2L" led_pin="PIN_5" />
 
-<UART />
+<UART flash_url="./flash" tty_num="ttyS0"/>
 
 #### Communication between CPU and RP2040
 
diff --git a/i18n/en/docusaurus-plugin-content-docs/current/x/x4/software/c_sdk_examples.md b/i18n/en/docusaurus-plugin-content-docs/current/x/x4/software/c_sdk_examples.md
index 13dd6280d..a11f7ce7b 100644
--- a/i18n/en/docusaurus-plugin-content-docs/current/x/x4/software/c_sdk_examples.md
+++ b/i18n/en/docusaurus-plugin-content-docs/current/x/x4/software/c_sdk_examples.md
@@ -42,7 +42,7 @@ In order to operate the IO resources on RP2040, we need a complete software envi
        <PoE flash_url="./flash" product_name="Radxa X4" poe_name="Radxa 25W PoE+ HAT for X4" poe_img="/img/x/x4/25w_poe_plus_for_x4_04.webp" />
     </TabItem>
      <TabItem value="UART">
-      <UART flash_url="./flash" />
+      <UART flash_url="./flash" tty_num="ttyS4" />
     </TabItem>
 </Tabs>