Overview

An exclusive USB-PD sniffer/injector/sink inspired by the renowned Google project, Twinkie. It has been reimagined to be accessible to all enthusiasts.
Twonkie is an excellent open-source solution for:

Sniffing USB Power Delivery traffic on both Control Channel lines (CC1/CC2)
Transparent interposer on a USB Type-C connection
Monitoring VBUS and VCONN voltages and currents (Supports USB PD 3.1 EPR voltages up to 48V)
Injecting PD packets on CC1 or CC2
Putting Rd/Rp/Ra resistors on CC1 or CC2

The hardware design of Twonkie by Joachim “dojoe” Fenkes is licensed under CC BY 4.0.

Documentation: