diff --git a/.drone.yml b/.drone.yml
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+++ b/.drone.yml
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+kind: pipeline
+type: docker
+name: build-and-release-esp32
+
+trigger:
+  branch:
+    - main
+    - master
+  event:
+    - push
+    - pull_request
+    - tag
+
+steps:
+  # --- 1. arduino-cli の準備、ボード・ライブラリ導入、ビルド ---
+  - name: build-firmware
+    image: python:3.11-slim
+    environment:
+      HOME: /root
+    commands:
+      - apt-get update && apt-get install -y curl git
+      # arduino-cli のインストール
+      - curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/usr/local/bin sh
+      # ESP32 パッケージインデックスの更新と 2.0.14 のインストール
+      - arduino-cli config init --overwrite
+      - arduino-cli config set board_manager.additional_urls https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
+      - arduino-cli core update-index
+      - arduino-cli core install esp32:esp32@2.0.14
+      # ライブラリのインストール
+      - mkdir -p /root/Arduino/libraries
+      - git clone https://github.com/pschatzmann/ESP32-A2DP.git /root/Arduino/libraries/ESP32-A2DP
+      - arduino-cli lib install "U8g2"
+      - arduino-cli lib install "Adafruit AHTX0"
+      - arduino-cli lib install "BH1750"
+      - arduino-cli lib install "Adafruit NeoPixel"
+      # スケッチのコンパイル
+      - |
+        arduino-cli compile \
+          --fqbn "esp32:esp32:esp32:PartitionScheme=huge_app,FlashMode=dio,FlashSize=4M" \
+          --build-path build_temp \
+          --output-dir build \
+          firmware/firmware.ino
+      # バイナリファイル名の正規化 (リネーム)
+      - |
+        if [ -f build/firmware.ino.bootloader.bin ]; then
+          mv build/firmware.ino.bootloader.bin build/bootloader.bin
+        fi
+        if [ -f build/firmware.ino.partitions.bin ]; then
+          mv build/firmware.ino.partitions.bin build/partitions.bin
+        fi
+        if [ -f build/firmware.ino.bin ]; then
+          mv build/firmware.ino.bin build/firmware.bin
+        fi
+
+  # --- 2. タグPush時（v*.*.*）に Gitea へリリース作成 ＆ バイナリ添付 ---
+  - name: release-to-gitea
+    image: plugins/gitea-release
+    settings:
+      base_url: https://gitea.j-code.org  # あなたの Gitea の URL に変更してください
+      api_key:
+        from_secret: gitea_token            # Drone Secrets に登録した Access Token
+      files:
+        - build/bootloader.bin
+        - build/partitions.bin
+        - build/firmware.bin
+    when:
+      event:
+        - tag
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