Smart Chair LoRaWAN System

Overview

Smart Chair combines battery-powered ChairKit nodes, a LoRaWAN gateway, cloud backend, and mobile booking app so each chair can report identity/location, map to a reservation, and stay synchronized with billing.

Highlights

• LoRaWAN chair nodes with GPS and accelerometer
• Gateway built on Compute Module 4 and ChirpStack
• .NET MAUI booking app
• .NET/PostgreSQL/Kubernetes backend

Challenges

• Cover an entire resort without running cables to every chair.
• Run each node for years on a non-rechargeable cell.
• Wake only on meaningful movement to preserve battery.
• Map each chair to a booking and bill end to end.

Solutions

• Built node, gateway, firmware, app, and cloud in parallel as one system.
• Used LoRaWAN for long-range, low-power communication from chairs to gateway.
• Implemented motion-interrupt wake, report, and deep-sleep behavior on the ChairKit node.
• Developed cloud services, PostgreSQL data model, CI/CD, and .NET MAUI app for scan-book-pay flows.

Features

• QR scan to identify chair
• Date/time booking
• Billing calculation
• User profile updates
• E-ink display
• Gateway Ethernet / USB-C / HDMI interfaces

Key Results

• Full-stack delivery completed in about one month.
• Engineered for years of node battery life with ~1% yearly self-discharge cell specification.
• System designed for field scaling, though not yet performance-tested in the field.