diff --git a/.github/workflows/checkSketches.yml b/.github/workflows/checkSketches.yml
index 4154106c..a1e8a972 100644
--- a/.github/workflows/checkSketches.yml
+++ b/.github/workflows/checkSketches.yml
@@ -59,6 +59,7 @@ jobs:
         path: compiled_hex.tar
   
   real_hardware_test_on_self_hosted_runner:
+    needs: arduino-cli_compile_all
     runs-on: self-hosted
     
     steps:
@@ -66,44 +67,54 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
 
-    # On 20241101, cli was installed at self-hosted runner _work/_tool/arduino-cli/1.0.4/arm64/arduino-cli
-    - name: Install Arduino CLI
-      uses: arduino/setup-arduino-cli@v2
+    - name: Download compile result from cloud runner, which is faster
+      uses: actions/download-artifact@v4
+      with:
+        name: compiled_hex
 
-    # # on 20241101, pwd is _work/ch55xduino/ch55xduino
-    # - name: pwd
-    #   run: pwd
+    - name: Unpack compiled hex
+      run: |
+        mkdir -p $GITHUB_WORKSPACE/compiled_hex
+        tar -xvf compiled_hex.tar -C $GITHUB_WORKSPACE/compiled_hex/
 
-    # # on 20241101, $RUNNER_TEMP is _work/_temp This directory is emptied at the beginning and end of each job.
-    # - name: echo runner temp dir
-    #   run: echo $RUNNER_TEMP
+    # # On 20241101, cli was installed at self-hosted runner _work/_tool/arduino-cli/1.0.4/arm64/arduino-cli
+    # - name: Install Arduino CLI
+    #   uses: arduino/setup-arduino-cli@v2
 
-    - name: Init Arduino CLI config
-      run: arduino-cli config init --config-dir "$RUNNER_TEMP/arduino_config"
+    # # # on 20241101, pwd is _work/ch55xduino/ch55xduino
+    # # - name: pwd
+    # #   run: pwd
 
-    - name: Add JSON URL to Arduino CLI config
-      run: arduino-cli config --config-dir "$RUNNER_TEMP/arduino_config" add board_manager.additional_urls https://raw.githubusercontent.com/DeqingSun/ch55xduino/ch55xduino/package_ch55xduino_mcs51_index.json
+    # # # on 20241101, $RUNNER_TEMP is _work/_temp This directory is emptied at the beginning and end of each job.
+    # # - name: echo runner temp dir
+    # #   run: echo $RUNNER_TEMP
 
-    - name: Update index of available boards
-      run: arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" update-index
+    # - name: Init Arduino CLI config
+    #   run: arduino-cli config init --config-dir "$RUNNER_TEMP/arduino_config"
 
-    - name: Install Ch55xduino board
-      run: arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" install CH55xDuino:mcs51
+    # - name: Add JSON URL to Arduino CLI config
+    #   run: arduino-cli config --config-dir "$RUNNER_TEMP/arduino_config" add board_manager.additional_urls https://raw.githubusercontent.com/DeqingSun/ch55xduino/ch55xduino/package_ch55xduino_mcs51_index.json
 
-    - name: get core version and copy package from repo to arduino-cli location
-      run: |
-        CH55XDUINO_VER=$(arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" list | grep 'CH55xDuino:mcs51' | awk '{print $2}')
-        echo "CH55xDuino:mcs51 version: $CH55XDUINO_VER"
-        cp -rf $GITHUB_WORKSPACE/ch55xduino/ch55x/* $RUNNER_TEMP/arduino_config/packages/CH55xDuino/hardware/mcs51/$CH55XDUINO_VER/
+    # - name: Update index of available boards
+    #   run: arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" update-index
 
-    # # on 20241101, $GITHUB_WORKSPACE is _work/ch55xduino/ch55xduino
-    # - name: show the github repo location
-    #   run: echo $GITHUB_WORKSPACE
+    # - name: Install Ch55xduino board
+    #   run: arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" install CH55xDuino:mcs51
 
-    # the compiled hex will be stored in $GITHUB_WORKSPACE/ch55xduino/ch55x/libraries/Generic_Examples/examples/compiled_hex/
-    - name: build all with python script
-      run: |
-        python3 $GITHUB_WORKSPACE/util/action_compile_all.py $GITHUB_WORKSPACE/ch55xduino/ch55x/libraries/Generic_Examples/examples $RUNNER_TEMP/arduino_config
+    # - name: get core version and copy package from repo to arduino-cli location
+    #   run: |
+    #     CH55XDUINO_VER=$(arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" list | grep 'CH55xDuino:mcs51' | awk '{print $2}')
+    #     echo "CH55xDuino:mcs51 version: $CH55XDUINO_VER"
+    #     cp -rf $GITHUB_WORKSPACE/ch55xduino/ch55x/* $RUNNER_TEMP/arduino_config/packages/CH55xDuino/hardware/mcs51/$CH55XDUINO_VER/
+
+    # # # on 20241101, $GITHUB_WORKSPACE is _work/ch55xduino/ch55xduino
+    # # - name: show the github repo location
+    # #   run: echo $GITHUB_WORKSPACE
+
+    # # the compiled hex will be stored in $GITHUB_WORKSPACE/ch55xduino/ch55x/libraries/Generic_Examples/examples/compiled_hex/
+    # - name: build all with python script
+    #   run: |
+    #     python3 $GITHUB_WORKSPACE/util/action_compile_all.py $GITHUB_WORKSPACE/ch55xduino/ch55x/libraries/Generic_Examples/examples $RUNNER_TEMP/arduino_config
 
     #checkout https://github.com/DeqingSun/CH552-Automatic-Test-Jig for test scripts, this will make the CH552-Automatic-Test-Jig inside the local copy of the CH55xDuino repo
     - name: Checkout test scripts
@@ -114,4 +125,4 @@ jobs:
 
     - name: run test scripts
       run: |
-        python3 $GITHUB_WORKSPACE/CH552-Automatic-Test-Jig/python/selfhost_runner_test.py $GITHUB_WORKSPACE/ch55xduino/ch55x/libraries/Generic_Examples/examples/compiled_hex $GITHUB_WORKSPACE/CH552-Automatic-Test-Jig/python/sketchTestCode $GITHUB_WORKSPACE/ch55xduino/tools/linux_arm/vnproch55x
+        python3 $GITHUB_WORKSPACE/CH552-Automatic-Test-Jig/python/selfhost_runner_test.py $GITHUB_WORKSPACE/compiled_hex $GITHUB_WORKSPACE/CH552-Automatic-Test-Jig/python/sketchTestCode $GITHUB_WORKSPACE/ch55xduino/tools/linux_arm/vnproch55x