Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Microcontroller | ESP32-WROOM-32 |
| Relay Channels | 4 Independent Channels |
| Max Load Capacity | 10A per Relay @ 250VAC |
| Operating Voltage | 5V DC Input |
| Wireless Protocol | Wi-Fi 2.4GHz & Bluetooth 4.2 |
| Flash Storage | 4MB SPI Flash |
| Programming Interface | Micro-USB Port |
| Supported IDEs | Arduino IDE, MicroPython, ESP-IDF |
| GPIO Availability | Multiple Pins Exposed |
| Board Dimensions | 65mm x 45mm x 20mm |
Anonymous
Apr 14, 2026
Rating: 5/5
Perfect for Home Automation
Works flawlessly with Home Assistant. The relay switching is fast and the Wi-Fi connection is stable. Highly recommend for IoT projects.
Anonymous
Mar 06, 2026
Rating: 5/5
Best ESP32 relay board I've used
Compact and reliable. I have used it to control lights and a fan. The auto-flashing support saved me a lot of time during development.
Anonymous
Feb 11, 2026
Rating: 3/5
One relay clicked loudly
Functionality is good but one of the relays makes a louder clicking noise than the others. Not a dealbreaker but noticeable in a quiet room.
Anonymous
Jan 28, 2026
Rating: 5/5
MicroPython support is excellent
Flashed CircuitPython easily and had the relays toggling within minutes. The GPIO access makes it very versatile for sensors too.
Anonymous
Jan 20, 2026
Rating: 4/5
Great hardware, docs need work
Board is solid and builds feel quality. Setup took a bit longer than expected because the wiki links were outdated, but once running it is great.
Q: What is the coil voltage for the relays?
A: The relays are driven by the 5V input supply provided to the board.
Q: Does the package include a USB cable?
A: No, the USB cable is sold separately. You will need a standard Micro-USB data cable.
Q: Can I control this board via MQTT?
A: Yes, it is fully compatible with MQTT protocols when programmed using Arduino IDE or MicroPython.
Q: Is 3.3V logic supported on the GPIO pins?
A: Yes, the ESP32 operates at 3.3V logic levels. Please ensure connected sensors are compatible.
Q: Is Home Assistant integration easy?
A: Yes, there are many community examples available for ESPHome and MQTT integration with Home Assistant.
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