Smart Thermostat App
Real-time temperature control, smart scheduling, and energy monitoring
powered by a connected device, AWS IoT cloud, and Apple HomeKit integration.
Project in a Nutshell
The Smart Thermostat project is an intelligent home climate control system that allows users to monitor, manage, and optimize heating through a mobile-friendly web application with native integrations.
The solution combines a connected thermostat device, a Progressive Web App (PWA), and a scalable cloud backend built on AWS IoT. Users can control temperature, schedules, presets, and energy consumption across multiple houses and rooms, while benefiting from real-time synchronization and automation features such as open-window detection.
Client & Challenge
The client’s goal was to build a modern, connected thermostat platform that goes beyond basic temperature control. The system needed to:
Support real-time remote control of thermostats
Work reliably across Wi-Fi, Bluetooth, and cloud connectivity
Integrate with Apple HomeKit
Provide intuitive scheduling and preset management
Offer visibility into energy consumption and savings
Scale to multiple houses, rooms, and devices per user
Solution
We designed and implemented a full end-to-end smart thermostat ecosystem, consisting of a connected device, a cloud backend, and a mobile-first web application.
The system enables users to onboard thermostats, configure heating schedules, manage multiple properties, and monitor energy usage – all from a single interface. Real-time communication between devices and the cloud is handled via AWS IoT and MQTT, ensuring immediate synchronization of all state changes.
Remote Thermostat Control
Users can adjust temperature manually or via presets and schedules, with changes reflected instantly on the physical device and across all connected apps
Multi-House & Multi-Room Management
The platform supports multiple houses, rooms, and thermostats, with centralized dashboards and bulk actions (e.g., applying presets to all thermostats)
Scheduling & Presets
Built-in schedules and presets (Home, Sleep, Eco) allow optimized comfort and energy efficiency, with flexible per-day configuration
Open Window Detection
Automatically detects open windows and temporarily disables heating to prevent energy waste.
Energy Consumption & Savings
The system visualizes heating runtime and calculates estimated savings compared to a standard manual thermostat
Apple HomeKit Integration
Thermostats can be added and controlled via Apple HomeKit, with full synchronization back to the app
Technical Highlights
Progressive Web App (PWA)
A mobile-friendly web application with native wrappers for Bluetooth and push notifications on iOS and Android
Cloud-Native Backend
Built with .NET 8 and deployed on AWS, using REST APIs for app communication and MQTT via AWS IoT Core for real-time device control
Real-Time Synchronization
All temperature changes, schedules, device states, and alerts are synchronized instantly between the thermostat, cloud, and app
Secure Device Onboarding
Thermostats can be added via Wi-Fi or Apple HomeKit, with QR-code-based pairing and secure device identification
Business Value
The Smart Thermostat platform enables the client to offer a competitive, future-ready smart-home product with strong differentiation in usability, automation, and energy awareness.
By combining real-time device control with consumption analytics, the solution delivers clear value to homeowners looking to reduce energy costs while maintaining comfort. The multi-property support and cloud architecture position the platform for growth, partnerships, and additional integrations post-MVP.
The system also lays a solid foundation for future features such as advanced analytics, AI-driven automation, and broader smart-home ecosystem support.
Conclusion
The Smart Thermostat project delivers a complete, scalable smart-heating solution built around real-time connectivity, intuitive UX, and robust cloud infrastructure.
By integrating device control, scheduling, automation, and energy insights into a single platform – with Apple HomeKit support and AWS IoT at its core – the solution provides both immediate user value and long-term growth potential.
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