Project Description

EIOT Energy EMS Dev Kit

The EIOT Energy EMS Dev Kit is an open-source Energy Management System (EMS) development platform based on the ESP32-S3 microcontroller.

This project is designed to integrate various energy assets—including power meters, inverters, and environmental sensors—into a single EMS node. Using the MQTT-based OpenAMI data model, it can collect, analyze, and transmit energy data efficiently.

MeshEMS is a fully open-source project that provides both hardware and software designs, aiming to enable the construction of low-cost microgrid and smart energy systems using affordable, widely available components.

In simple terms, it can be described as:

"An Energy IoT gateway that reads power data, transmits it over a network, and enables cloud-based energy analytics."

About EIOT Energy

Website: http://www.eiot.energy/

EIOT (Energy IoT Open Source) is an open-source community focused on developing microgrid and energy IoT technologies based on solar power systems, ESS (Energy Storage Systems), smart meters, and EMS platforms.

Leveraging the OpenAMI data model and various open-source projects, EIOT aims to build low-cost, accessible energy management systems that anyone can deploy and customize.

Project Goals

According to the development roadmap on GitHub, the project aims to go beyond simple sensor monitoring and evolve into a comprehensive energy management platform.

1. Solar Inverter Integration

Development of monitoring and control functions for:

• Sol-Ark inverters
• SunSpec-compliant inverters
• Solar charge controllers
• Other renewable energy devices

Features include real-time data acquisition and automated control.

2. Battery ESS Integration

Support for:

• BMS (Battery Management System) data collection
• Charge and discharge control
• Battery health and status monitoring

3. Smart Meter Integration

Support for:

• Single-phase and three-phase power meters
• Prepaid and postpaid electricity meters
• Bidirectional power flow measurement

4. Microgrid Energy Management

The long-term goal is to integrate:

• Solar generation
• Battery storage
• Smart meters
• Utility grid connections

into a unified system that automatically optimizes energy flow.

Example Scenario

Solar generation: 5 kW
Current load: 2 kW

→ Excess 3 kW is used to charge the ESS.

Battery reaches 100% charge

→ Excess power is exported or sold back to the grid.

The EMS software is designed to make these energy management decisions automatically.

System Architecture

Energy Meter / Inverter
          │
      RS-485
          │
          ▼
    ESP32-S3 EMS
          │
 ┌────────┼────────┐
 │        │        │
 ▼        ▼        ▼
OLED    CAN Bus  Ethernet
Display           W5500/W6100
                   │
                   ▼
              MQTT Broker
                   │
                   ▼
            Cloud EMS Platform

The ESP32-S3 EMS Controller collects and processes data from energy devices and transmits it to a cloud EMS platform through MQTT.

Similar Existing Projects

Open Energy Gateway + W5500

Link:
https://maker.wiznet.io/Hannah/projects/open-energy-gateway-w5500/?serob=rd&serterm=year

Similarities

This project collects energy meter data using an ESP32 and W5500 Ethernet controller and integrates with IoT platforms through:

• Modbus TCP/IP
• WebSocket
• REST API

Like the EIOT EMS Dev Kit, it utilizes reliable wired Ethernet communication for energy data transmission and can be expanded into smart building, industrial monitoring, and smart grid applications.

ESP32 JSY Energy Meter Gateway with W5500 Support

Link:
https://maker.wiznet.io/Benjamin/projects/esp32-jsy-energy-meter-gateway-with-w5500-support/

Similarities

This project uses an ESP32-S3 with W5500 Ethernet support to provide:

• Power monitoring dashboards
• API services
• UDP telemetry

It shares a similar ESP32-based energy gateway architecture and benefits from the stability of wired Ethernet connectivity.

Differentiation and Expansion Value

Unlike conventional energy monitoring projects that focus primarily on:

• Data acquisition
• Dashboard visualization
• MQTT transmission

the EIOT Energy EMS Dev Kit is designed as a scalable EMS development platform capable of integrating:

• Smart meters
• Solar inverters
• ESS systems
• BMS devices
• Microgrid control systems

By utilizing the OpenAMI data model, it standardizes energy assets and provides a foundation for future expansion into cloud-based EMS platforms and advanced microgrid control systems.

This makes it an excellent example of how WIZnet Ethernet solutions can serve not only as network interfaces but also as critical communication infrastructure for:

• Energy IoT
• Smart metering
• Microgrids
• Industrial EMS applications

Role of WIZnet Ethernet Solutions

Supported Devices

• W5500
• W6100

MeshEMS officially supports WIZnet Ethernet modules for 100Base-T Ethernet connectivity.

Why Ethernet?

Energy management systems typically require:

• 24/7 operation
• Reliable data collection
• Minimal packet loss
• Industrial-grade deployment capability

In such environments, Ethernet is often preferred over Wi-Fi due to its reliability and stability.

WIZnet Ethernet solutions provide a robust communication backbone for transmitting critical energy data.

Market Opportunities and Applications

Summary

The EIOT Energy EMS Dev Kit is an open-source ESP32-S3-based energy management platform that utilizes RS-485 Modbus, CAN Bus, Ethernet, Wi-Fi, and MQTT to collect and transmit energy data.

By leveraging WIZnet W5500/W6100 Ethernet solutions, it provides reliable wired network connectivity for mission-critical energy applications. The platform can be used in a wide range of scenarios, including:

• Smart metering
• Microgrids
• Smart buildings
• Industrial energy management systems
• Renewable energy monitoring

As a scalable and open development platform, it demonstrates how WIZnet Ethernet technology can play a key role in next-generation Energy IoT and smart energy infrastructure.