diff --git a/.github/workflows/run-cl-arduino.yml b/.github/workflows/run-cl-arduino.yml
new file mode 100644
index 0000000..99feaeb
--- /dev/null
+++ b/.github/workflows/run-cl-arduino.yml
@@ -0,0 +1,52 @@
+name: Run Ci Arduino
+
+on:
+  push:
+  pull_request:
+  repository_dispatch:
+    types: [trigger-workflow]
+
+jobs:
+  ci-arduino:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Checkout script repository
+        uses: actions/checkout@v4
+        with:
+            repository: Seeed-Studio/ci-arduino
+            path: ci
+
+
+      - name: Setup arduino cli
+        uses: arduino/setup-arduino-cli@v2.0.0
+
+      - name: Create a depend.list file
+        run: |
+          # eg: echo "<repo>" >> depend.list
+
+
+
+      - name: Create a ignore.list file
+        run: |
+          # eg: echo "<path>,<fqbn>" >> ignore.list
+
+
+      - name: Build sketch
+        run: ./ci/tools/compile.sh
+
+      - name: Build result
+        run: |
+            cat build.log
+            if [ ${{ github.event_name }} == 'pull_request' ] && [ -f compile.failed ]; then
+                exit 1
+            fi
+
+      - name: Generate issue
+        if: ${{ github.event_name != 'pull_request' }}
+        run: ./ci/tools/issue.sh
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
diff --git a/Seeed_MPR121_driver.cpp b/Seeed_MPR121_driver.cpp
index 5128055..67ada8d 100644
--- a/Seeed_MPR121_driver.cpp
+++ b/Seeed_MPR121_driver.cpp
@@ -71,7 +71,9 @@ s32 Mpr121::select_mode(sensor_mode_t mode) {
         case START_PROXIMITY_DISABLE_MODE:
             return sensor_start_proximity_disable();
             break;
-        default: break;
+        default: 
+            return -1;
+            break;
     }
 }
 
@@ -173,7 +175,7 @@ void Mpr121::get_filtered_reg_data(u16* elecs_stat, u16* elecs_filtered_data) {
 
 //use frutits as example
 void Mpr121::get_fruits_data(u16* elecs_stat, u16* elecs_filtered_data) {
-    u16 value = 0;
+
     u8 data_l, data_h;
     for (int i = 0; i < CHANNEL_NUM; i++) {
         if ((*elecs_stat) & (1 << i)) {
@@ -190,7 +192,7 @@ void Mpr121::get_fruits_data(u16* elecs_stat, u16* elecs_filtered_data) {
 }
 
 void Mpr121::get_baseline_data(u16 elecs_stat, u8* base_line_data) {
-    u16 value = 0;
+
     u8 data = 0;
     for (int i = 0; i < CHANNEL_NUM; i++) {
         if (elecs_stat & (1 << i)) {
@@ -207,6 +209,7 @@ void Mpr121::get_baseline_data(u16 elecs_stat, u8* base_line_data) {
  * */
 s32 Mpr121::sensor_stop() {
     return IIC_write_byte(ELEC_CFG_REG_ADDR, 0);
+    return 0;
 }
 
 /** @brief Set start mode with proximity enable by set ELEC_CFG_REG_ADDR to 0x0
@@ -214,6 +217,7 @@ s32 Mpr121::sensor_stop() {
  * */
 s32 Mpr121::sensor_start_proximity_enable() {
     IIC_write_byte(ELEC_CFG_REG_ADDR, 0x3c);
+    return 0;
 }
 
 /** @brief Set start mode with proximity disable by set ELEC_CFG_REG_ADDR to 0x0
@@ -221,6 +225,7 @@ s32 Mpr121::sensor_start_proximity_enable() {
  * */
 s32 Mpr121::sensor_start_proximity_disable() {
     IIC_write_byte(ELEC_CFG_REG_ADDR, 0x3c);
+    return 0;   
 }
 
 
diff --git a/Seeed_MPR121_driver.h b/Seeed_MPR121_driver.h
index ff02cda..90fb108 100644
--- a/Seeed_MPR121_driver.h
+++ b/Seeed_MPR121_driver.h
@@ -112,7 +112,7 @@ typedef enum {
     ERROR_PARAM = -1,
     ERROR_COMM = -2,
     ERROR_OTHERS = -128,
-} err_t;
+} mpr_err_t;
 
 
 #define CHECK_RESULT(a,b)   do{if(a=b)  {    \
diff --git a/examples/fruit_demo/fruit_demo.ino b/examples/fruit_demo/fruit_demo.ino
index e144ed7..15ff08e 100644
--- a/examples/fruit_demo/fruit_demo.ino
+++ b/examples/fruit_demo/fruit_demo.ino
@@ -1,6 +1,8 @@
 #include "Seeed_MPR121_driver.h"
 
-#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
+#ifdef SEEED_XIAO_M0
+    #define SERIAL Serial
+#elif defined(ARDUINO_SAMD_VARIANT_COMPLIANCE)
     #define SERIAL SerialUSB
 #else
     #define SERIAL Serial