DORHEA ESP32 WiFi 4 Channel Relay Module Instruction Manual

1. Producto terminadoview

The DORHEA ESP32 WiFi 4 Channel Relay Module is a versatile development board designed for smart home and wireless control applications. It integrates the robust ESP32-WROOM-32E module, offering WiFi connectivity and a large 4MByte Flash memory. The module features four independent 5V relays, capable of switching various loads. It supports flexible power input options, including AC220V and DC5-30V, and is compatible with the Arduino IDE for easy programming and development.

Figura 1: Anverso y reverso view of the ESP32 WiFi 4 Channel Relay Module.

2. Características

• Integrated ESP32-WROOM-32E WiFi module with 4MByte Flash.
• Flexible power supply: Supports AC220V or DC5-30V input.
• Four 5V relays with output switch signals, suitable for controlling loads up to AC250V/DC30V.
• Includes an RST reset button and a programmable button for user interaction.
• I/O ports and UART program download port are exposed for secondary development.
• Features 1 programmable LED and individual relay indicator LEDs.

Figura 2: detallada views of key components on the module, including the ESP32 chip, relays, and power input section.

3. Contenido del paquete

El paquete incluye los siguientes artículos:

• 1 x AC/DC Power Supply ESP32 Four-Way Relay Module
• 2 x 10 Double Row Pin Headers
• 1 x 6 Single Row Pin Header
• 1 x Single Line Cap

Figure 3: The ESP32 relay module along with the included pin headers for connectivity.

4. Instrucciones de configuración

Follow these steps to set up your ESP32 WiFi 4 Channel Relay Module:

4.1. Component Identification and Pinout

Before connecting, familiarize yourself with the module's components and pin assignments. Refer to the diagram below for a clear understanding of each terminal and indicator.

Figure 4: Labeled diagram of the module's connections and features.

• AC 220V Power Supply: Connect your AC 220V power source here.
• DC 7-30V Power Supply: Connect your DC 7-30V power source here.
• TIERRA: Ground connection for DC power.
• Fuente de alimentación de 5 V: 5V output for external components.
• Relay Indicator Light: LEDs that illuminate when the corresponding relay is active.
• Luz indicadora de poder: Indicates the module is powered on.
• LED programable: A user-controllable LED.
• ESP-32E: The main ESP32-WROOM-32E module.
• Botón de reinicio: Resets the ESP32 module.
• Relay Connections (NO, COM, NC): Each of the four relays has Normally Open (NO), Common (COM), and Normally Closed (NC) terminals for connecting loads.

4.2. Conexión de la fuente de alimentación

Choose one of the following power supply methods:

• Alimentación CA: Connect AC 220V to the designated AC 220V terminals (L and N).
• Energía DC: Connect DC 7-30V to the DC 7-30V terminals, ensuring correct polarity (positive to VCC, negative to GND).

Caution: Ensure only one power source is connected at a time. Incorrect wiring can damage the module or connected devices.

4.3. Connecting Loads to Relays

Each relay provides three terminals: Normally Open (NO), Common (COM), and Normally Closed (NC). To control a load:

• For a load that should be APAGADO when the relay is inactive and ON when active, connect one side of the load to the COM terminal and the other side to the NO Terminal.
• For a load that should be ON when the relay is inactive and APAGADO when active, connect one side of the load to the COM terminal and the other side to the NC Terminal.

Warning: Always ensure the load's voltage and current ratings are within the relay's specifications (AC250V/DC30V, 10A) to prevent damage or hazards.

4.4. Programación del módulo

The module can be programmed using the Arduino IDE. You will need a USB to TTL adapter to connect the module's UART program download port to your computer. The GPIO pins for the relays and programmable LED are as follows:

• Relé 1: GPIO32
• Relé 2: GPIO33
• Relé 3: GPIO25
• Relé 4: GPIO26
• LED programable: GPIO23

After initial programming via UART, Over-The-Air (OTA) updates can be configured for wireless code uploads.

5. Instrucciones de funcionamiento

Once programmed, the ESP32 module will execute the uploaded code to control the relays and other functionalities. The relay indicator lights will show the current state of each relay (ON/OFF).

• Control inalámbrico: Utilize the ESP32's WiFi capabilities to integrate the module into your smart home network. This allows for remote control of connected devices via a smartphone app, web interface, or home automation platform.
• Control manual: The programmable button can be configured in your code to trigger specific actions, such as toggling a relay or changing modes.

6. Mantenimiento

To ensure the longevity and reliable operation of your module, follow these maintenance guidelines:

• Mantener seco: Protect the module from moisture and humidity to prevent short circuits and corrosion.
• Limpieza: Mantenga la pizarra limpia de polvo y residuos. Utilice un cepillo suave y seco o aire comprimido para limpiarla. Evite los limpiadores líquidos.
• Temperatura: Utilice el módulo dentro del rango de temperatura especificado. Evite el calor o el frío extremos.
• Tratar con cuidado: Avoid dropping or subjecting the module to physical shock. When handling, minimize contact with electronic components to prevent electrostatic discharge.

7. Solución de problemas

Si encuentra problemas con su módulo, considere los siguientes pasos de solución de problemas:

• Sin luz indicadora de alimentación:
  • Verifique que la fuente de alimentación esté conectada correctamente y proporcione el volumen especificado.tage (AC220V or DC5-30V).
  • Compruebe si hay conexiones sueltas o cables dañados.
• El relé no conmuta:
  • Ensure your code is correctly configured to activate the desired GPIO pin for the relay (GPIO32, GPIO33, GPIO25, GPIO26).
  • Check the load connections (NO, COM, NC) for proper wiring.
  • Verify the load's power requirements are within the relay's capacity.
• Problemas de conectividad WiFi:
  • Confirm the WiFi credentials (SSID and password) in your ESP32 code are correct.
  • Ensure the module is within range of your WiFi network.
  • Verifique si hay alguna configuración de firewall o enrutador que pueda estar bloqueando la conexión.
• Programming Upload Failure:
  • Ensure the correct board and port are selected in the Arduino IDE.
  • Verify the USB to TTL adapter is functioning correctly and its drivers are installed.
  • Check the wiring between the module's UART port and the USB to TTL adapter.

8. Especificaciones

Figure 5: Module dimensions for planning and integration.

9. Garantía y soporte

DORHEA products are designed for reliability and performance. For any technical assistance or inquiries regarding your ESP32 WiFi 4 Channel Relay Module, please refer to the seller's support channels on the platform of purchase. Keep your purchase receipt for warranty claims, if applicable.