Pre Flashed Tasmota ESP32-C3 Power Monitoring Works with Home Assistant
Product Overview
Upgrade ordinary lights and appliances with this compact ESP32-C3 smart relay switch. Designed for Tasmota-based smart-home projects, it features a built-in HLW8032 energy metering chip, a 10A relay, Matter protocol support, and MQTT connectivity.
Monitor power consumption, create smart automations, and control connected AC loads through your preferred smart-home system.
Key Features
ESP32-C3 Wi-Fi smart control platform
Tasmota-compatible firmware support
Built-in HLW8032 energy monitoring
Measures voltage, current, active power, and cumulative energy
10A single-channel relay output
Supports AC 100–240V electrical systems
Matter protocol support for smart-home integration
MQTT support for local automation and custom systems
External wall switch or push-button connection through S1/S2 terminals
Compact design for smart lighting and appliance control
Neutral wire required for installation
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | ESP32-C3 mini smart relay switch |
| Relay Type | Single-channel relay |
| Maximum Relay Rating | 10A |
| Operating Voltage | AC 100–250V |
| Energy Metering Chip | HLW8032 |
| Measured Data | Voltage, current, active power, and cumulative energy |
| Communication | Wi-Fi, Matter, and MQTT |
| Firmware | Tasmota-compatible |
| Terminals | L-IN, L-OUT, N-IN, N-OUT, S1, S2 |
| Installation Type | AC wiring installation |
| Neutral Wire | Required |
Terminal Description
L-IN: AC live input
L-OUT: Switched live output to the load
N-IN: AC neutral input
N-OUT: Neutral output to the load
S1 / S2: External wall switch or push-button terminals
Wiring Instructions
Switch off the main power before installation.
Connect the AC live wire to L-IN.
Connect the AC neutral wire to N-IN.
Connect the load wires to L-OUT and N-OUT.
Connect an external wall switch or push-button to S1 and S2 according to the wiring diagram.
Tighten all terminals securely and check the wiring before restoring power.
Be sure to follow the terminal markings on the actual device. Never connect mains power to S1/S2.
Compatible Applications
Ceiling lights
Wall lights
Lamps
Exhaust fans
Small household appliances
Energy monitoring projects
DIY smart-home systems
Tasmota, Matter, and MQTT automation projects
Use the relay only within its rated capacity. Motors, LED drivers, and other inductive or high-inrush loads may require a lower safe operating current or an external contactor.
Why Choose This Smart Relay?
With ESP32-C3 processing, Tasmota flexibility, HLW8032 energy monitoring, Matter integration, and MQTT support, this mini relay is suitable for both everyday smart-home control and advanced DIY automation projects.
Control your devices, monitor their energy usage, and integrate them into your preferred smart-home platform.
Package Contents
1 × ESP32-C3 Tasmota Mini Smart Relay Switch
Package accessories may vary according to the selected product option.
Safety Notice
This product involves hazardous AC mains voltage. Installation must be performed by a qualified electrician or an experienced professional. Disconnect the power supply before wiring or maintenance. Make sure the enclosure is properly installed and protected before use.
GPIOs
GPIO20:CSE7766 Rx
GPIO3: Button
GPIO4: Switch
GPIO6: Relay
GPIO7: LedLinki
