Test device firmware CI

Author: manuelbl

.github/workflows/test-devices.yaml

@@ -0,0 +1,29 @@
+name: Test Devices CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/pip
+            ~/.platformio/.cache
+          key: ${{ runner.os }}-pio
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+      - name: Install PlatformIO Core
+        run: pip install --upgrade platformio
+
+      - name: Build loopback firmware
+        run: pio run
+        working-directory: ./test-devices/loopback
+
+      - name: Build composite firmware-stm32
+        run: pio run
+        working-directory: ./test-devices/composite-stm32