diff --git a/.env.sample b/.env.sample
new file mode 100644
index 0000000..71b8949
--- /dev/null
+++ b/.env.sample
@@ -0,0 +1,5 @@
+# MQTT CONFIGURATION
+MQTT_HOST=localhost
+MQTT_PORT=1883
+MQTT_DEVICE_CODE=test0001
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f78d3c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+mqttmock
+.env
\ No newline at end of file
diff --git a/README.md b/README.md
index e69de29..fa4f46b 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,28 @@
+# mosquitto-mock-server
+
+* Mosquittoを構築して、MQTTの動作を検証するためのブランチ
+* Broker
+  * ブローカにはmosquittoを使用する
+* Client
+  * Paho-mqttライブラリを使用して接続する
+
+
+## init
+
+
+### 開発用仮想空間を作成する
+
+```bash
+python -m venv mqttmock
+# (windows)
+mqttmock\Scripts\activate
+# (linux)
+source mqttmock/bin/activate
+```
+
+ライブラリをインストールする
+
+```bash
+pip install -r requirements.txt
+```
+
diff --git a/client/mqtt_client.py b/client/mqtt_client.py
new file mode 100644
index 0000000..2fd94b8
--- /dev/null
+++ b/client/mqtt_client.py
@@ -0,0 +1,34 @@
+import paho.mqtt.client as mqtt
+import os
+from dotenv import load_dotenv
+import time
+import json
+
+
+load_dotenv(dotenv_path=".env.test")
+
+MQTT_HOST = os.getenv("MQTT_HOST")
+MQTT_PORT = int(os.getenv("MQTT_PORT"))
+MQTT_DEVICE_CODE = int(os.getenv("MQTT_DEVICE_CODE"))
+
+
+def on_connect_mock(client, userdata, flags, rc, properties):
+    print(f"Connected with result code {rc}")
+
+
+def test_mqtt_mock():
+
+    # connect処理
+    client = mqtt.Client()
+    client.on_connect = on_connect_mock
+    client.connect(MQTT_HOST, MQTT_PORT, 60)
+    time.sleep(5)
+
+
+def main():
+    print("Mqtt Mock Client Start.")
+    test_mqtt_mock()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/docker-compose.yaml b/docker-compose.yaml
new file mode 100644
index 0000000..e6a187b
--- /dev/null
+++ b/docker-compose.yaml
@@ -0,0 +1,8 @@
+version: '3.8'
+services:
+  mosquitto-mock:
+    image: eclipse-mosquitto:latest
+    ports:
+      - "1883:1883"  # 標準のMQTTポート
+    volumes:
+      - ./mosquitto/config:/mosquitto/config  # Mosquittoの設定ファイルが含まれるディレクトリ
diff --git a/mosquitto/config/mosquitto.conf b/mosquitto/config/mosquitto.conf
new file mode 100644
index 0000000..03a96d5
--- /dev/null
+++ b/mosquitto/config/mosquitto.conf
@@ -0,0 +1,4 @@
+set_tcp_nodelay true
+listener 1883
+allow_anonymous true
+max_queued_messages 0
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..ee206ce
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+paho-mqtt
+requests
+python-dotenv
+requests
\ No newline at end of file