Abstract
S0tool is an open-source Internet of Things (IoT) project. Professional S0 & water meter measurement tool from huizebruin.nl and s0tool.nl. 🌟 Star this repo for updates! A hobby project - flash your device and start monitoring in minutes! ⚡. The S0tool is an ESPHome-based device that transforms regular water and energy meters into smart meters. Seamlessly integrate with Home Assistant to monitor real-time consumption and optimize your usage. It is built using HTML, ESP8266. Key capabilities include: Water Meter Monitoring - Track water consumption in real-time; Energy Meter Support - Monitor kWh usage from S0 pulse outputs; Home Assistant Integration - Native ESPHome integration with auto-discovery. The complete source code is publicly available on GitHub under the MIT License, making it a useful reference for students building an Internet of Things (IoT) mini project or final-year project.
1. Introduction
The S0tool is an ESPHome-based device that transforms regular water and energy meters into smart meters. Seamlessly integrate with Home Assistant to monitor real-time consumption and optimize your usage.
[![last commit time][github-last-commit]][github-master] [![GitHub Activity][commits-shield]][commits] [![License][license-shield]](LICENSE) [![Forks][forks-shield]][forks-url] [![Stargazers][stars-shield]][stars-url] [![Issues][issues-shield]][issues-url] [![Contributors][contributors-shield]][contributors-url] [](https://GitHub.com/huizebruin/s0tool/releases) [![Discord][discord-shield]][discord]
2. Objective
Professional S0 & water meter measurement tool from huizebruin.nl and s0tool.nl. 🌟 Star this repo for updates! A hobby project - flash your device and start monitoring in minutes! ⚡
This project demonstrates how HTML, ESP8266 can be applied to a real-world Internet of Things (IoT) problem.
3. Key Features / Modules
- Water Meter Monitoring - Track water consumption in real-time
- Energy Meter Support - Monitor kWh usage from S0 pulse outputs
- Home Assistant Integration - Native ESPHome integration with auto-discovery
- Energy Dashboard Compatible - Display data in HA Energy Dashboard (v2022.11+)
- OTA Updates - Update firmware wirelessly through ESPHome
- Easy Web Installation - Flash firmware directly from your browser
- Real-time Monitoring - Instant updates on consumption
- Multiple Meter Support - Connect both water and energy meters simultaneously
4. Technology Stack
5. System Requirements
General requirements for this technology stack — check the README for exact versions.
- A modern web browser
- VS Code or any code editor
- Git (to clone the repository)
6. Installation & Setup
git clone https://github.com/huizebruin/s0tool.git
cd s0tool- Visit https://s0tool.nl/installation.html
- Connect your S0tool via USB
- Click "Install" and follow the wizard
- Compatible with Chrome, Edge, and Opera browsers
Full setup instructions are in the project README.
7. Future Enhancements
Suggested extensions you can add to make this your own project.
- Add a mobile dashboard using Blynk or Firebase
- Store readings in a cloud database for history charts
- Add alerts via SMS / Telegram when thresholds are crossed
8. Viva / Review Questions
Common questions examiners ask for projects in this domain.
- Which microcontroller / board and sensors are used and why?
- How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
- Where is the sensor data stored and visualised?
- How is power consumption managed?
- How would you secure the device and its communication?
9. Source Code & License
This project is developed by huizebruin and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.
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