diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
new file mode 100644
index 0000000..f8adaa5
--- /dev/null
+++ b/.gitea/workflows/build.yml
@@ -0,0 +1,38 @@
+name: Build Firmware
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build stm32-teslacharger
+    runs-on: fedora
+
+    steps:
+      - name: Checkout with submodules
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: Build libopencm3
+        run: make -C libopencm3 -j$(nproc)
+
+      - name: Build firmware
+        run: make -j$(nproc)
+
+      - name: Show binary size
+        run: |
+          arm-none-eabi-size stm32_charger.elf
+          ls -lh stm32_charger.bin
+
+      - name: Upload binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: stm32-teslacharger-${{ github.sha }}
+          path: stm32_charger.bin
+          retention-days: 30