building the bsidescpt17 rfchallenge

The report describes building an RFCat-based RF chat client and challenge server for BSides Cape Town 2017 using cc1111/Yardstick One hardware, covering RF configuration (frequency, sync word, modulation, baud), half‑duplex handling with threaded send/receive logic, message queuing and retransmissions for reliability, and a multi-stage puzzle that required decoding hints (including XOR/base64) to ultimately trigger a hardware box unlock; code is shared via a GitHub gist.