Murphy Reverse Engineering

Firmware dumps, extracted artifacts, reverse-engineering notes, and porting plans for the Murphy family of e-paper readers.

Work is organized per hardware generation. Each generation is self-contained, including the firmware it runs: Murphy M3 runs the OEM MoFei/corogoo firmware, while Murphy M4 is MurphyOS — the CrossPoint-derived "Murphy Reader" build.

Repository Layout

• m3/ — Murphy M3 (ESP32-S3). 16 MiB flash dump, carved partitions, segment/Ghidra analysis, per-subsystem findings, and Arduino hardware probes. Display, SD, buttons, and front light are ported and booting under CrossPoint. Includes the OEM MoFei/corogoo reference firmware and extracted display LUTs in m3/oem_firmware/.
• m4/ — Murphy M4 / MurphyOS: hardware findings, recovery procedures, and a working experimental CrossPoint port with display, touch, buttons, SD card, battery, and dual-channel frontlight support.
• vendor/ — vendor reference material (git submodules): Elecrow CrowPanel ESP32 3.7" E-paper HMI, Corogoo 3.7" ink-screen reader, and Good Display panel datasheets.
• tools/ — shared tooling: Ghidra loader/mining scripts and a local build of the Xtensa Ghidra processor plugin.

Start Here

• Murphy M3 overview: m3/README.md
• M3 findings (per-subsystem): m3/findings/README.md
• M3 porting plan: m3/findings/porting_crosspoint.md
• M3 OEM firmware identity (MoFei/corogoo): m3/findings/upstream_mofei_firmware.md
• Murphy M4 / MurphyOS overview: m4/README.md
• MurphyOS ↔ CrossPoint code reuse: m4/findings/murphy_reader_code_reuse.md

Hardware Snapshot

The M3 is an ESP32-S3-WROOM-1-N8R8-class board (8 MiB PSRAM, 16 MiB flash) with a UC8253-based Good Display GDEY037T03-FT21 panel at 416x240, closely matching the Elecrow CrowPanel ESP32 3.7" E-paper HMI family. Full pin map, flash layout, and port status are in m3/README.md.