Software Engineering · India
Smart AC Control Stack
We built a cross‑platform smart AC controller app that connects units over Bluetooth and Wi‑Fi, enabling remote control, real‑time analytics, diagnostics, and technician tools through a secure, IoT‑ready architecture powered by React Native and MQTT.
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Client Overview
About Our Client
Our client is a forward‑looking HVAC and appliance technology provider focused on modernizing how customers and technicians manage air‑conditioning systems using mobile and IoT solutions.
- Industry
- HVAC, Smart Home / IoT
- App Type
- Cross‑platform Mobile App (iOS & Android)
- Services
- Product Strategy, Mobile App Development, IoT Integration, Backend Communication Design, QA & Deployment
- Engagement Model
- End‑to‑end Product Engineering / Agile Delivery
Tech Stack Used
- React Native
- Native Bluetooth modules
- Wi‑Fi bridging
- MQTT server
- analytics & diagnostics tooling
- modular component architecture
Requirement
The client needed a robust mobile application that could pair AC units via Bluetooth, provision them on Wi‑Fi, support full remote operation, expose deep diagnostics for technicians, and stream analytics—all while ensuring secure, low‑latency communication between devices, app, and MQTT backend.
Results
Simplified Device Onboarding
Bluetooth pairing and guided Wi‑Fi setup significantly reduced installation time and user friction when connecting new AC units.
Higher User Convenience & Insight
Remote operation and real‑time analytics gave customers precise control and visibility into energy usage and performance trends.
Faster, Data‑Driven Servicing
Built‑in diagnostics, error reporting, and technician tools shortened troubleshooting cycles and improved first‑time fix rates.
IoT‑Ready Platform for Expansion
The secure, modular architecture positioned the client to extend the solution to additional device types and advanced energy‑efficiency features.
Our Process
Requirement Analysis
Worked with product and service teams to define customer and technician flows, connectivity scenarios, and reliability and security constraints across homes and field environments.
Tech Stack Selection
Chose React Native for a unified iOS/Android codebase and MQTT as the lightweight IoT messaging backbone, complemented by native Bluetooth and Wi‑Fi integrations.
Architecture Design
Designed a modular architecture with reusable UI components (dashboard, remote, validation screens) and clear layers for connectivity, messaging, and analytics, enabling future device additions.
Development
Implemented Bluetooth pairing, Wi‑Fi setup, remote control surfaces, error reporting, technician test flows, secure MQTT publish–subscribe channels, and encrypted data transfer.
Testing & QA
Performed extensive connectivity, performance, and edge‑case testing across networks and devices to validate command reliability, data integrity, and UX smoothness.
Deployment
Prepared production builds for iOS and Android, integrated with the MQTT infrastructure, and rolled out in phases with monitoring for usage, stability, and device behavior.
Core Solution
Unified Smart AC Controller
Delivered a React Native app that lets users pair ACs, adjust temperature and modes, and manage multiple devices from a single dashboard with polished transitions and responsive controls.
IoT Messaging with MQTT
Implemented a publish‑subscribe model where commands and telemetry flow through lightweight MQTT topics, enabling reliable control and feedback even on unstable networks.
Dual Customer & Technician Flows
Created dedicated experiences for end users (comfort controls, service requests, insights) and technicians (diagnostics, test flows, error codes) to streamline both usage and maintenance.
Secure, Scalable Connectivity Layer
Combined encrypted Bluetooth/Wi‑Fi communication with MQTT and modular components so new AC models and future smart appliances can be onboarded with minimal changes.
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