Smart Thermostat Development: Production-Ready HVAC IoT Platform
RNDSquare partnered with a climate-tech startup to build a production-ready smart thermostat platform for the North American HVAC market, not just a prototype. Using the S3 Engineering Suite, the team defined the system architecture on an ARM-based SoC running Android 10 and Linux, designed the complete hardware platform, and developed the embedded firmware and OS layers with a focus on power efficiency, thermal stability, and long-term reliability. A secure cloud architecture enabled remote provisioning, configuration, and real-time monitoring across deployed devices, while an integrated OTA framework allowed safe, non-disruptive firmware and application updates in the field.
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As the platform stabilized, the project transitioned into the S3 Manufacturing Suite, where RNDSquare supported pilot builds, functional and manufacturing validation, and DFM/DFA improvements before mass production. Golden samples, production test procedures, calibration workflows, and factory documentation were created to ensure repeatable quality at scale. This allowed manufacturing partners to ramp up production without engineering dependency, while maintaining consistent device performance and quality standards.
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The completed solution enabled the client to accelerate time-to-market while maintaining production-grade quality and scalability. The thermostat design was optimized for mass manufacturing, with robust firmware, cloud connectivity, and OTA capabilities supporting long-term maintenance and feature expansion. Remote monitoring and update capabilities reduced field service requirements, improved user experience, and positioned the product for scalable growth across consumer markets.
Full-Stack Product Engineering
System architecture, hardware, firmware, OS, and cloud built as one integrated engineering workflow.
Cloud-Connected Smart Device with OTA Ready
Secure connectivity enables remote monitoring, configuration, and device management.
Built for Production
Golden samples, manufacturing docs, test flows, and factory support for predictable rollout..
