SEAFRONT ESP32 8-Channel DC5-30V Programmable WiFi BLE Relay Module User Manual

1.製品オーバーview

The SEAFRONT ESP32 8-Channel Relay Module is a versatile development board designed for smart home control, IoT projects, and secondary ESP32 development. It integrates an ESP32-WROOM-32E module with 4MB Flash, providing WiFi and BLE connectivity. This board features 8 onboard 5V relays, programmable buttons, a reset button, and a programmable LED, making it suitable for controlling various loads with operating voltages between 250V AC and 30V DC.

図1: トップダウン view of the SEAFRONT ESP32 8-Channel Relay Module.

2. パッケージ内容

パッケージを開封したら、以下のコンポーネントがすべて含まれていることを確認してください。

• 1 x SEAFRONT ESP32 8-Channel Relay Module
• 2 x 9-pin Dual Connectors
• 1 x 6-pin Single Connector
• 1 x Jumper Cap

3. 仕様

図 2: 拡大図 view of the 8 relays and power input section.

4. セットアップと配線

This section outlines the basic steps for connecting and powering your ESP32 Relay Module.

1. 電源接続: Connect a DC 5-30V power supply to the designated power input terminals on the board. Ensure correct polarity.
2. 負荷接続: Connect your desired loads (e.g., lights, motors) to the relay terminals. Each relay provides normally open (NO) and common (COM) contacts. Refer to the silkscreen on the PCB for specific connections.
3. 周辺機器の接続: If using external sensors or other peripherals, connect them to the exposed I/O ports as required by your application.

Figure 3: The relay module integrated into a smart home concept. The board supports 4MB Flash capacity.

The module is designed for easy installation and use. All I/O ports and UART program download ports are exposed for convenient secondary development.

図4：以上view of I/O ports, reset key, and programmable key on the module.

5. Operating Instructions and Programming

This module is primarily intended for programmable control. Basic operation involves uploading custom firmware to the ESP32 chip to control the relays via WiFi or BLE.

5.1. Relay Control

The 8 onboard relays are controlled by the ESP32 microcontroller. Each relay can be individually switched on or off through software commands. The relays are suitable for controlling loads with a working voltage最大250VACまたは30VDC。

5.2. Programming the ESP32 Module

The ESP32-WROOM-32E module supports various development environments, including the Arduino IDE and ESP-IDF. To program the module, you will typically need a TTL USB serial converter.

1. Connect the Serial Converter: Use a jumper cap to connect the 00 and GND pins on the ESP32 development board. Then, connect your TTL serial port module (e.g., FT232) to the computer's USB port. The connection between the serial port module and the ESP32 development board is as follows:

   TTL Serial Port Module	ESP32 開発ボード
   グランド	グランド
   TX	RX
   RX	TX
   5V	5V

2. IDEでボードを選択: In your development environment (e.g., Arduino IDE), select the board as "ESP32 Dev Module" under the Tools > Board menu.
3. Open and Upload Program: Open your program code. In the Tools > Port menu, select the correct COM port number for your serial converter. Click "Upload" to compile and download the program to the ESP32 module.
4. Disconnect and Reset: After successful upload, disconnect the connection between 00 and GND. Power cycle the development board or press the reset button to run your program.

Figure 5: Visual guide for programming the ESP32 module using a serial converter and Arduino IDE.

Relay Pin Assignments: Based on user feedback, the GPIO pins controlling the relays are typically: GPIO32、GPIO33、GPIO25、GPIO26、GPIO27、GPIO14、GPIO12、GPIO13. It is recommended to verify these assignments with your specific firmware or by testing.

Figure 6: Close-up of the ESP32 module and onboard programmable buttons.

6。 トラブルシューティング

• モジュールの電源が入らない:
  • Ensure the DC power supply is within the 5-30V range and correctly connected to the power input terminals.
  • 接続が緩んでいないか、またはワイヤーが損傷していないか確認してください。
• Relays Not Actuating:
  • Verify your program code is correctly uploaded and configured to control the specific relay GPIO pins.
  • Ensure the load connected to the relay is within its voltageおよび現在の評価。
  • Check for proper wiring between the load and the relay terminals.
• プログラミングの問題:
  • Confirm the TTL USB serial converter is correctly wired (TX to RX, RX to TX, GND to GND, 5V to 5V).
  • Ensure the correct COM port is selected in your IDE.
  • Verify that the 00 and GND pins are jumpered during programming and disconnected afterward.
  • Check if the necessary ESP32 board definitions are installed in your IDE.
• WiFi/BLE Connectivity Problems:
  • Ensure your firmware includes the necessary WiFi/BLE libraries and configuration.
  • Check for strong signal strength in the operating environment.
  • Verify network credentials if connecting to a WiFi network.

7. メンテナンス

To ensure the longevity and reliable operation of your ESP32 Relay Module, follow these maintenance guidelines:

• 清潔に保ちます： 定期的に、柔らかく乾いたブラシでボードを掃除し、ほこりやゴミを取り除いてください。液体の使用は避けてください。
• 環境条件: Operate the module within its specified temperature and humidity ranges. Avoid extreme conditions.
• 安全な接続: すべての配線接続が安全で腐食がないことを定期的に確認してください。
• ファームウェアの更新： Keep your ESP32 firmware updated to benefit from bug fixes and new features.
• 物理的保護: Consider housing the module in an enclosure to protect it from physical damage and environmental factors.

図 7: 拡大図 view of the terminal blocks for power and relay connections.

8. 保証とサポート

Specific warranty information for this product is not provided in the available documentation. For details regarding warranty coverage, returns, or technical support, please contact the seller or the manufacturer directly. Please refer to your purchase receipt or the seller's platform for contact information.