ESP32-WROOM-32E WiFi Bluetooth Relay Module DC7-60V Smart Home IoT Development Board
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Description
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🧠 ESP32-WROOM-32E WiFi Bluetooth Development Board with Single Relay Module DC7–60V (ESP32_Relay_X1_V1.2)
Smart Home • IoT • Automation • ESP32 Development
The ESP32-WROOM-32E Relay Development Board (ESP32_Relay_X1_V1.2) is a compact, high-performance Wi-Fi + Bluetooth module designed for automation, smart home control, and embedded development.
With a dual-core 240 MHz processor, 4 MB flash, an onboard 5 V relay and wide input voltage (7–60 V), this board is ideal for IoT switching and programmable control applications.
⚠️ Programming Notice — External USB-TTL Programmer Required
This relay-module version does not include a built-in USB-to-serial interface.
The Micro-USB port is for power input only.To upload custom firmware, you will need an external USB-TTL/UART programmer (PL2303, CH340, FTDI, CP2102, etc.) connected to the 4-pin UART header (5V, TX, RX, GND).
How to Enter Programming Mode
To place the ESP32 into flashing mode:
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Hold the BOOT (IO0) button
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Apply power through the USB-TTL programmer
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Release the BOOT button
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Upload your firmware via Arduino IDE or ESPTool
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Power-cycle the board to run the new program
This is a standard ESP32 bootloader procedure for modules without onboard auto-programming circuitry.
⚙️ Key Features
🔹 ESP32-WROOM-32E module (dual-core 240 MHz, 4 MB Flash)
🔹 Wi-Fi 802.11 b/g/n + Bluetooth 4.2 BLE
🔹 On-board 5 V relay (AC 250 V / DC 30 V switching)
🔹 Wide DC input: 7–60 V or Micro-USB 5 V power
🔹 UART header for programming and debugging
🔹 BOOT/IO0 function button for entering programming mode
🔹 Relay status LED + user-programmable indicator LED
🔹 Access to key GPIO pins for development
🔹 Compact PCB: 57.5 × 53.7 × 17 mm
🔹 PCB Version: ESP32_Relay_X1_V1.2
📊 Specifications
Parameter Description Microcontroller ESP32-WROOM-32E PCB Version ESP32_Relay_X1_V1.2 Flash 4 MB Power Input DC 7–60 V or Micro-USB 5 V (power only) Relay Rating AC 250 V / DC 30 V max Relay Channels 1 Interfaces UART, GPIO, Micro-USB power Logic Voltage 3.3 V Button BOOT / IO0 function key LEDs Relay indicator + programmable LED Wireless Wi-Fi 802.11 b/g/n + BLE 4.2 Dimensions 57.5 × 53.7 × 17 mm
🏠 Applications
✅ Smart Home Automation
✅ IoT Wireless Relay Control
✅ ESP32 Learning & Development
✅ Remote Switching
✅ DIY Automation Projects
✅ Embedded Industrial Control
📦 Package Includes
1 × ESP32-WROOM-32E Single Relay Development Board
(PCB Version: ESP32_Relay_X1_V1.2, DC 7–60 V Input) -
Additional information
| Weight | 60 g |
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| Dimensions | 260 × 160 × 20 mm |
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