A $19 USB dongle from Xianyu successfully bypasses STM32 RDP1 protection on F0, F1, F2, and F4 series chips. The device includes a blue programmer, adapter boards for various chip packages, and a Windows utility that reads protected flash memory without requiring voltage glitching or cooling.

Testing with an STM32F205RBT6 showed the tool works at room temperature, reading all 128KB of flash despite software quirks that pad beyond the boundary with 0xFF bytes. Users must disable Windows Defender and set Chinese encoding to run the software, which immediately triggers antivirus alerts.

The device represents a turnkey solution for bypassing RDP1 protection, contrasting with previous methods like voltage glitching on F4 chips or the Exception(al) Failure exploit on F1. While other attacks required building glitching rigs and tuning parameters, this tool simply needs the chip soldered to an adapter and a button click.