Project Hub /Audio Displays & Interactive Media/LED Matrix & Cube Displays/Alexa-Enabled Smart IoT Electricity Meter Switch Board

Intermediate

ESP32

₹1,500 – ₹5,000

6 – 12 Hours

Partial Kit

Alexa-Enabled Smart IoT Electricity Meter Switch Board

An Alexa-enabled smart IoT electricity meter switch board that tracks power usage, calculates billing, and enables voice and mobile app control.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 520.00
5V 1 Channel Relay Module Rs. 45.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Voltage Sensor Module
Current Sensor ACS712

Browse all components

How It Works

The Alexa-Enabled Smart IoT Electricity Meter Switch Board operates by combining real-time electrical sensing with Wi-Fi-enabled microcontroller processing. At the core of the system is the ESP32 Development Board, which interfaces with a voltage sensor and a current sensor to continuously monitor the electrical parameters of connected loads. The voltage sensor steps down or safely measures the high-voltage AC supply, while the current sensor monitors the rate of electrical flow. The ESP32 processes these analog and digital readings to calculate power consumption and estimate ongoing billing data. For control, the system uses relays or solid-state switches connected to the ESP32's general-purpose input/output (GPIO) pins, allowing the low-voltage microcontroller signals to safely switch higher-voltage mains appliances on or off. By leveraging the ESP RainMaker SDK, the ESP32 connects to local wireless networks and communicates with cloud services. This connectivity allows users to send voice commands via Amazon Alexa or interact through a mobile application to control the relay states remotely and retrieve live energy usage statistics from the switchboard enclosure.

Why Build This

Develop practical competencies in integrating microcontroller logic with high-voltage alternating current (AC) distribution systems.

Gain hands-on experience implementing Internet of Things (IoT) protocols and voice assistant integration using the ESP RainMaker ecosystem.

Design and deploy functional smart home infrastructure capable of real-time power monitoring and automated energy management.

Real-World Application

Home automation, smart energy management, appliance power tracking, over-voltage/over-current protection, and remote voice-controlled electrical switching.

Skills You'll Learn

AC power sensing

relay switching control

IoT cloud integration

wireless microcontroller programming

sensor data calibration

Safety Precautions

Exercise extreme caution when working with mains voltage (AC power). Ensure proper insulation, correct wiring of current and voltage sensors, and disconnect power before making any circuit modifications.

Technology Tags

ESP32

ESP RAINMAKER

IOT

SMART HOME

ALEXA

GOOGLE ASSISTANT

ENERGY MONITORING

VOLTAGE SENSOR

CURRENT SENSOR

WI-FI PROVISIONING

Frequently Asked Questions

Can I connect this switchboard directly to a standard wall outlet without any sensors?

No, the voltage and current sensors are essential components required to safely measure electrical parameters and feed usable data into the ESP32 microcontroller.

How does Amazon Alexa communicate with the ESP32 board?

The ESP32 connects to your local Wi-Fi network and uses the ESP RainMaker SDK to link with cloud services, which then interface with your Alexa account for voice commands.

What is the purpose of the relays or solid-state switches in this circuit?

The relays act as electronically controlled switches, allowing the low-voltage logic signals from the ESP32 to safely open and close high-voltage AC circuits connected to your appliances.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01482