diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 8b13789..96d8f62 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -1 +1,24 @@
+# see: https://github.com/marketplace/actions/test-compile-for-arduino
 
+name: build
+on: [push, pull_request]
+jobs:
+  build:
+    name: build for MCU
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Compile sketch
+      uses: ArminJo/arduino-test-compile@v3
+      with:
+        arduino-board-fqbn: esp32:esp32:m5stack-atoms3:CDCOnBoot=cdc
+        arduino-platform: esp32:esp32@2.0.15
+        platform-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
+        required-libraries: M5AtomS3@1.0.0,M5Unified@0.1.14
+        sketch-names: "*.ino"
+        sketch-names-find-start: bbn_*/*
+        extra-arduino-cli-args: "--warnings default"
+        set-build-path: true