A conference talk covering how .NET developers can build apps that interact with physical hardware using Bluetooth Low Energy, NFC, USB, and Wi-Fi protocols. The speaker explains BLE concepts by mapping them to familiar REST/HTTP analogies (services as API roots, characteristics as endpoints, read/write/notify as HTTP verbs). He also presents a hardware test harness he built to enable AI coding agents like GitHub Copilot to reliably develop and debug hardware integrations — bridging the gap between unit tests and manual QA by running scripted tests against real connected devices. .NET MAUI and Uno Platform are highlighted as cross-platform frameworks that expose native hardware sensors. The talk also touches on on-device AI inference, the competitive moat of hardware products, and the challenges of iOS USB certification (MFI).