Smart House Number

Overview

Smart House Number is an IoT address display system designed to improve home visibility at night and during emergencies. The product combines outdoor-ready hardware, embedded firmware, mobile app control, and backend infrastructure into a full-stack connected device.

Highlights

• Automatic dusk-to-dawn operation based on ambient light sensing
• Special LED modes for emergency alerts and delivery scenarios
• Mobile configuration with real-time device control
• Secure OTA firmware updates and cloud-based device tracking

Challenges

• Operate reliably outdoors across extreme temperatures from -40°C to +85°C
• Support modular digit architecture for flexible address assembly
• Enable simple plug-and-play installation for end users
• Provide secure mobile onboarding, OTA updates, and remote configuration

Solutions

• Designed a 4-layer PCB with epoxy conformal coating for waterproofing and durability
• Used magnetic 2-pin pogo connector for 12V DC input and marine-grade modular connectors for daisy-chaining digits
• Developed firmware in C++ with ESP-IDF for ESP32-C6, including dusk-to-dawn sensing, LED modes, provisioning, and secure HTTPS OTA
• Built a cross-platform mobile app with .NET MAUI and Swift/SwiftUI for Bluetooth pairing, LED control, emergency trigger, and push notifications
• Implemented a backend with .NET Core, PostgreSQL, Azure, Kubernetes, and CI/CD pipelines

Features

• Normal, delivery, and emergency flashing LED modes
• BLE or Wi-Fi provisioning for initial setup
• Brightness, color, and preset alert mode control
• OTA firmware versioning, rollback, and logging
• Internal dashboard for device tracking

Key Results

• MVP delivered in 12 weeks
• Passed 45+ days of continuous outdoor testing
• Setup time reduced to under 3 minutes per unit
• 500+ units successfully deployed across the U.S.
• Product launched on the client’s e-commerce store
• Continued support for Phase 2 feature expansion