Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
5V WiFi Relay Control for Quick Remote Switching
The ESP8266 5V Wi-Fi Relay Module combines wireless control and a relay output on one board, making it easy to turn devices on or off from a phone or WiFi-connected system. It is a practical option for smart home experiments, remote power control, and simple IoT projects.
Because it runs from 5V, it is easy to test on common bench supplies and USB-based project setups.
Important: This module can work in AP mode for direct phone control or through the same router as the phone, depending on how your project is set up.
Why you'll like it
- ESP8266 onboard: Built for wireless control
- 5V supply: Easy to power on the bench
- AP mode support: Useful for direct local control
- 10A relay output: Good for many AC and DC loads within rating
- Fast response: Good for smart switching projects
What you can build
Use it for smart plugs, remote reset switches, WiFi-controlled lights, fans, pumps, and simple phone-operated automation jobs.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus jumper wires, a suitable power supply, and a small load for bench testing.
Recommended add-ons
Useful add-ons include terminal block, breadboard, power modules, fuses, and enclosure, especially when you are working with higher voltages or inductive loads.
Technical specifications
| Product | ESP8266 5V Wi-Fi Relay Module |
|---|---|
| Supply voltage | 5V DC |
| Wireless mode | AP mode or router-based control |
| Max transmission distance | Up to 400m in open space |
| Relay load | 10A @ 250VAC or 10A @ 30VDC |
| UART settings | 9600 baud, 8 data bits, 1 stop bit, no parity |
| Extra protection | Diode protection |
Compare the WiFi relay options
| Version | Supply | Connectivity | Load rating | Best fit |
|---|---|---|---|---|
| ESP8266 10A WiFi Relay (7V–30V input) | 7V–30V DC | ESP8266, HTTP / MQTT / custom firmware | 10A @ 220VAC class | Custom IoT and control boxes |
| ESP8266 5V WiFi Relay | 5V DC | AP mode / router-based phone control | 10A @ 250VAC / 10A @ 30VDC | Simple wireless switching |
Pinout & power notes
Provide a stable 5V supply, connect the board to the chosen WiFi setup, then route the target device through the relay output. For mains loads, place the module in a safe insulated enclosure.
What’s in the box
1 × ESP8266 5V Wi-Fi Relay Module
Frequently Asked Questions
Can I control it without a WiFi router?
Yes. AP mode lets a phone connect directly to the module in some setups.
Yes. AP mode lets a phone connect directly to the module in some setups.
Is the 400m range guaranteed?
No. That figure is for open-space conditions and real-world range is often shorter.
No. That figure is for open-space conditions and real-world range is often shorter.
What can I switch with it?
Lights, fans, pumps, and other loads that stay inside the relay rating.
Lights, fans, pumps, and other loads that stay inside the relay rating.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →