Description
The Elektor ESP32 Energy Meter is a device designed for real-time energy monitoring and smart home integration. Powered by the ESP32-S3 microcontroller, it offers robust performance with modular and scalable features.
The device uses a 220 V-to-12 V step-down transformer for voltage sampling, ensuring galvanic isolation and safety. Its compact PCB layout includes screw-type terminal blocks for secure connections, a Qwiic connector for additional sensors, and a programming header for direct ESP32-S3 configuration. The energy meter is compatible with single-phase and three-phase systems, making it adaptable for various applications.
The energy meter is simple to set up and integrates with Home Assistant, offering real-time monitoring, historical analytics, and automation capabilities. It provides accurate measurements of voltage, current, and power, making it a valuable tool for energy management in homes and businesses.
Features
-
Comprehensive Energy Monitoring: Get detailed insights into your energy usage for smarter management and cost savings.
-
Customizable Software: Tailor functionality to your needs by programming and integrating custom sensors.
-
Smart Home Ready: Compatible with ESPHome, Home Assistant, and MQTT for full Smart Home integration.
-
Safe & Flexible Design: Operates with a 220 V-to-12 V step-down transformer and features a pre-assembled SMD board.
-
Quick Start: Includes one Current Transformer (CT) sensor and access to free setup resources.
Specifications
| Microcontroller |
ESP32-S3-WROOM-1-N8R2 |
| Energy Metering IC |
ATM90E32AS |
| Status Indicators |
4x LEDs for power consumption indication
2x Programmable LEDs for custom status notifications |
| User Input |
2x Push buttons for user control |
| Display Output |
I²C OLED display for real-time power consumption visualization |
| Input Voltage |
110/220 V AC (via step-down transformer) |
| Input Power |
12 V (via step-down transformer or DC input) |
| Clamp Current Sensor |
YHDC SCT013-000 (100 A/50 mA) included |
| Smart Home Integration |
ESPHome, Home Assistant, and MQTT for seamless connectivity |
| Connectivity |
Header for programming, Qwiic for sensor expansion |
| Applications |
Supports single-phase and three-phase energy monitoring systems |
| Dimensions |
79.5 x 79.5 mm |
Included
- 1x Partly assembled board (SMDs are pre-mounted)
- 2x Screw terminal block connerctors (not mounted)
- 1x YHDC SCT013-000 current transformer
Required
- Power transformer not included
Downloads
From Prototype to Finished Product
What started as an innovative project to create a reliable and user-friendly energy meter using the ESP32-S3 microcontroller has evolved into a robust product. Initially developed as an open-source project, the ESP32 Energy Meter aimed to provide precise energy monitoring, smart home integration and more. Through meticulous hardware and firmware development, the energy meter now stands as a compact, versatile solution for energy management.
