Explore the world of open source Bluetooth device firmware for IoT and Maker projects in this 43-minute presentation by Marcel Holtmann from Intel's Open Source Technology Center. Discover how to leverage the Mynewt project to build firmware for Nordic nRF51 and nRF52 radio chips, and learn to interact with these devices using Linux or Zephyr operating systems. Gain insights into utilizing Linux on Minnowboard or Zephyr on Arduino 101 systems, opening up endless possibilities for innovative applications. Delve into Bluetooth's history, future, and ecosystem, understanding stack diagrams, Bluetooth Low Energy roles, and the status of HCI support. Learn about liberating Bluetooth controllers, debugging with Arduino 101, and explore emerging trends in the field. As the maintainer of the BlueZ open source Bluetooth stack, Holtmann provides expert knowledge on building and implementing open source Bluetooth device firmware for various IoT and Maker community use cases.