Explore the world of Bluetooth-based IoT solutions using the Zephyr operating system in this informative conference talk. Delve into the rich connectivity support offered by Zephyr, including its highly customizable Bluetooth 4.2 compliant stack with Bluetooth Low Energy capabilities. Learn about the integration of Bluetooth with Zephyr's IPv6/6LoWPAN stack, enabling IPv6 over Bluetooth Smart. Discover the process of writing Bluetooth applications for Zephyr, including rapid prototyping techniques using a Linux host with Bluetooth support and qemu. Gain insights into creating fully open-source solutions for Intel Curie-based boards, from BLE controller firmware to Zephyr applications. Presented by Johan Hedberg, a Linux kernel Bluetooth subsystem maintainer and BlueZ project contributor, this talk covers Bluetooth architecture, runtime considerations, network buffers, configuration options, application development, and future developments in Zephyr's Bluetooth support.