diff --git a/.github/workflows/esp32.yml b/.github/workflows/esp32.yml
index 7b14b9d..127ed1d 100644
--- a/.github/workflows/esp32.yml
+++ b/.github/workflows/esp32.yml
@@ -6,7 +6,7 @@ name: CI
 # events but only for the master branch
 on:
   push:
-    branches: [ main ]
+    branches: [ main, dev ]
     paths:
       - 'src/**'
       - 'platformio.ini'
@@ -67,3 +67,15 @@ jobs:
         with:
           name: esp32c3-app-firmware
           path: .pio/build/c3/firmware.bin
+      - name: Build Firmware ESP32-S3
+        run: pio run -e s3
+      - name: Archive merged firmware
+        uses: actions/upload-artifact@v4
+        with:
+          name: esp32s3-firmware-merged
+          path: .pio/build/s3/firmware_merged.bin
+      - name: Archive firmware
+        uses: actions/upload-artifact@v4
+        with:
+          name: esp32s3-app-firmware
+          path: .pio/build/s3/firmware.bin
diff --git a/platformio.ini b/platformio.ini
index 2554213..9ac70b9 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -64,5 +64,12 @@ upload_flags =
 platform = espressif32
 board = esp32-c3-devkitm-1
 build_type = release
+build_flags = 
+  -Os
+
+[env:s3]
+platform = espressif32
+board = esp32-s3-devkitm-1
+build_type = release
 build_flags = 
   -Os
\ No newline at end of file