In this presentation you will learn how to use Tizen on Raspberry Pi for quick and affordable prototyping of great ideas for Internet of Things. The presentation will cover the whole life cycle during the development of IoT from hardware to software. Guidelines how to build and customize Tizen for Raspberry Pi using the Yocto Project and OpenEmbedded will be provided. We will discuss how to connect various sensors and peripherals to Raspberry Pi using I2C, SPI, 1-Wire, USB and how to add analog-to-digital converter for retrieving data from analog sensors. Strategies for integration of communication protocols such as MQTT and CoAP as well as device-to-device frameworks such as IoTivity will be revealed. Furthermore the attendees will learn how to create custom hardware add-on boards following Raspberry Pi foundation specifications for HAT (Hardware Attached on Top) using KiCAD and other free an open source software tools. The presentation is appropriate for anyone interested in building entirely open source products based on Tizen that feature open source hardware and open source software. No previous experience with Tizen or hardware knowledge is required. The targeted audience includes platform developers, hardware engineers, hobbyists, makers, and students. Hopefully the presentation will encourage them to grab a soldering iron and start prototyping their own open source Tizen device.