# Twonkie > Twonkie is a USB-PD sniffer, injector and sink built around a four-layer board derived from the open-source Twinkie design. It supplies board fabrication files, assembly guidance and STM32 firmware sources for inspecting USB Power Delivery traffic. - Type: Tool - Targets: Protocol - Category: Protocol analysis tools - Relationship: Foundation tool - Sources reviewed: 2026-11-06 - Added to the catalog: 2026-11-09 - Original resource: - Primary source: - Catalog page: - Record JSON: - Chinese version: [简体中文](https://awesomerea.org/zh/resources/twonkie-usb-pd-sniffer/index.md) ## Requirements & limits - **Prerequisites:** Building the hardware requires a fabricated board, components and fine-pitch SMT soldering. - **Prerequisites:** Firmware builds require arm-none-eabi-gcc; flashing requires dfu-util. - **License:** Hardware design: CC BY 4.0; firmware: BSD 3-Clause. ## Primary sources 1. 2. ## More in Protocols - [BresserWeatherSensorReceiver](https://awesomerea.org/resources/bresser-weather-sensor-receiver/index.md) · Tool - [rtlamr](https://awesomerea.org/resources/rtlamr/index.md) · Tool - [ORBCOMM receiver](https://awesomerea.org/resources/orbcomm-receiver/index.md) · Tool - [iridium-sniffer](https://awesomerea.org/resources/iridium-sniffer/index.md) · Tool - [Booma.Proxy](https://awesomerea.org/resources/booma-proxy/index.md) · Tool - [gr-elster](https://awesomerea.org/resources/gr-elster/index.md) · Tool ## About this entry The description was reviewed against primary sources. Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.