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5V ESP8266 WiFi Relay Module
Control any AC or DC appliance remotely over WiFi with this compact 5V ESP8266 WiFi Relay Module. Combining the powerful ESP-01 WiFi microcontroller with a robust 10A relay, this all-in-one board lets you switch lights, fans, motors, solenoids, and more from a smartphone, web browser, or cloud platform - no additional microcontroller required. Ideal for home automation, IoT prototyping, and smart switching projects. Available now from The Engineer Store, Bengaluru with fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.
Specifications
| Module | ESP8266 ESP-01 WiFi + Single-Channel Relay |
| Supply Voltage | 5V DC (via micro-USB or header pins) |
| ESP8266 Logic Voltage | 3.3V (on-board regulator included) |
| WiFi Standard | 802.11 b/g/n, 2.4 GHz |
| Processor | ESP8266 Tensilica L106, 80 MHz (up to 160 MHz) |
| Flash Memory | 1 MB (8 Mbit) - supports Arduino OTA & AT firmware |
| Relay Type | SPDT (Single Pole Double Throw) - NO, NC, COM terminals |
| Relay Rated Load | 10A @ 250V AC / 10A @ 30V DC |
| Relay Trigger | GPIO0 of ESP-01 (active low, with optocoupler isolation) |
| Isolation | Optocoupler between ESP8266 logic and relay coil |
| Indicator LEDs | Power LED + Relay Status LED |
| Communication | WiFi (TCP/IP, HTTP, MQTT, WebSocket) |
| Firmware Compatibility | Arduino IDE, ESP-AT Commands, NodeMCU Lua, MicroPython, ESPHome, Tasmota |
| Board Dimensions | Approx. 37 x 25 mm (relay carrier board) |
| Mounting | Two M2 screw holes for panel or DIN-rail bracket mounting |
| Operating Temperature | -10 degreesC to 60 degreesC |
| Type | IoT WiFi Relay / Smart Switch Module |
| Origin | Original / Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- Standalone WiFi Control: The on-board ESP-01 connects directly to your WiFi router - no Arduino, Raspberry Pi, or external MCU needed to toggle the relay.
- 10A High-Power Relay: Switch mains-voltage appliances (up to 250V AC @ 10A) such as lights, fans, pumps, heaters, and motorized locks safely.
- Optocoupler Isolation: The relay driver circuit is electrically isolated from the ESP8266 via an optocoupler, protecting sensitive logic from relay-induced voltage spikes.
- On-Board 3.3V Regulator: Feed 5V to the board and the built-in AMS1117-3.3 regulator supplies clean 3.3V to the ESP-01 - no external level shifting required.
- Screw Terminal Output: Sturdy 3-pin screw terminal (COM, NO, NC) accepts 14-22 AWG wires for reliable high-current connections.
- Compact Form Factor: The tiny footprint fits inside standard electrical junction boxes, behind switchboards, or inside appliance enclosures.
- Multiple Firmware Options: Flash Arduino sketches, Tasmota (instant Alexa / Google Home support), ESPHome (Home Assistant), or custom AT-command firmware.
- OTA Updates: Once connected to WiFi, upload new firmware over-the-air without physically accessing the module.
- Status LEDs: Instantly see power and relay state at a glance - useful during installation and debugging.
- Low Standby Power: Draws under 200 mA during WiFi activity and only ~70 mA in deep-sleep mode, making it suitable for always-on applications.
Why Choose This?
- 100% authentic ESP8266 module sourced directly from trusted, authorized distributors
- 1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse to most Indian pin codes
- Expert technical support included - get help with wiring, firmware flashing, and cloud integration
- Tested and QC-verified before dispatch to ensure relay switching, WiFi connectivity, and GPIO response
- Compatible with popular smart-home ecosystems: Alexa, Google Home, Apple HomeKit (via HomeAssistant), Blynk, MQTT brokers, and more
Common Applications & Project Ideas
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy 5V ESP8266 WiFi Relay Module Online in India
Purchase the 5V ESP8266 WiFi Relay Module online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 5V ESP8266 WiFi Relay Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy 5V ESP8266 WiFi Relay Module at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.
```html
5V ESP8266 WiFi Relay Module
Control any AC or DC appliance remotely over WiFi with this compact 5V ESP8266 WiFi Relay Module. Combining the powerful ESP-01 WiFi microcontroller with a robust 10A relay, this all-in-one board lets you switch lights, fans, motors, solenoids, and more from a smartphone, web browser, or cloud platform - no additional microcontroller required. Ideal for home automation, IoT prototyping, and smart switching projects. Available now from The Engineer Store, Bengaluru with fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.
Specifications
| Module | ESP8266 ESP-01 WiFi + Single-Channel Relay |
| Supply Voltage | 5V DC (via micro-USB or header pins) |
| ESP8266 Logic Voltage | 3.3V (on-board regulator included) |
| WiFi Standard | 802.11 b/g/n, 2.4 GHz |
| Processor | ESP8266 Tensilica L106, 80 MHz (up to 160 MHz) |
| Flash Memory | 1 MB (8 Mbit) - supports Arduino OTA & AT firmware |
| Relay Type | SPDT (Single Pole Double Throw) - NO, NC, COM terminals |
| Relay Rated Load | 10A @ 250V AC / 10A @ 30V DC |
| Relay Trigger | GPIO0 of ESP-01 (active low, with optocoupler isolation) |
| Isolation | Optocoupler between ESP8266 logic and relay coil |
| Indicator LEDs | Power LED + Relay Status LED |
| Communication | WiFi (TCP/IP, HTTP, MQTT, WebSocket) |
| Firmware Compatibility | Arduino IDE, ESP-AT Commands, NodeMCU Lua, MicroPython, ESPHome, Tasmota |
| Board Dimensions | Approx. 37 x 25 mm (relay carrier board) |
| Mounting | Two M2 screw holes for panel or DIN-rail bracket mounting |
| Operating Temperature | -10 degreesC to 60 degreesC |
| Type | IoT WiFi Relay / Smart Switch Module |
| Origin | Original / Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- Standalone WiFi Control: The on-board ESP-01 connects directly to your WiFi router - no Arduino, Raspberry Pi, or external MCU needed to toggle the relay.
- 10A High-Power Relay: Switch mains-voltage appliances (up to 250V AC @ 10A) such as lights, fans, pumps, heaters, and motorized locks safely.
- Optocoupler Isolation: The relay driver circuit is electrically isolated from the ESP8266 via an optocoupler, protecting sensitive logic from relay-induced voltage spikes.
- On-Board 3.3V Regulator: Feed 5V to the board and the built-in AMS1117-3.3 regulator supplies clean 3.3V to the ESP-01 - no external level shifting required.
- Screw Terminal Output: Sturdy 3-pin screw terminal (COM, NO, NC) accepts 14-22 AWG wires for reliable high-current connections.
- Compact Form Factor: The tiny footprint fits inside standard electrical junction boxes, behind switchboards, or inside appliance enclosures.
- Multiple Firmware Options: Flash Arduino sketches, Tasmota (instant Alexa / Google Home support), ESPHome (Home Assistant), or custom AT-command firmware.
- OTA Updates: Once connected to WiFi, upload new firmware over-the-air without physically accessing the module.
- Status LEDs: Instantly see power and relay state at a glance - useful during installation and debugging.
- Low Standby Power: Draws under 200 mA during WiFi activity and only ~70 mA in deep-sleep mode, making it suitable for always-on applications.
Why Choose This?
- 100% authentic ESP8266 module sourced directly from trusted, authorized distributors
- 1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse to most Indian pin codes
- Expert technical support included - get help with wiring, firmware flashing, and cloud integration
- Tested and QC-verified before dispatch to ensure relay switching, WiFi connectivity, and GPIO response
- Compatible with popular smart-home ecosystems: Alexa, Google Home, Apple HomeKit (via HomeAssistant), Blynk, MQTT brokers, and more
Common Applications & Project Ideas
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy 5V ESP8266 WiFi Relay Module Online in India
Purchase the 5V ESP8266 WiFi Relay Module online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 5V ESP8266 WiFi Relay Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy 5V ESP8266 WiFi Relay Module at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.