OpenEOS — 5D Mark II phone tether

Goal: control a Canon EOS 5D Mark II from an Android phone over a USB-OTG cable — live view, shutter, exposure (ISO/Tv/Av/WB) — no Wi-Fi, no CCAPI (the 5D2 predates both).

Approach

This combines two upstream open-source projects, both Apache-2.0:

• open-eos-control — modern Android app (Gradle/Kotlin/Compose) with a working USB/PTP transport, live view UI, and connection flow. Its Canon property/command tables are pinned to the EOS R6 Mark III, which is why it currently rejects several 5D2 operations as "not advertised."
• remoteyourcam-usb — an older (2013) Android app built and used against 5D2-era Canon EOS bodies. Its EosCamera/EosConstants/ptp/commands/eos code is reference evidence for how this camera generation's Canon PTP vendor extension actually behaves.

Plan: keep open-eos-control's app shell and transport layer, and extend/ replace its Canon capability tables with 5D2-era values sourced from remoteyourcam-usb, so the modern UI stops gating features the 5D2 actually supports.

Layout

• vendor/open-eos-control — unmodified upstream snapshot, for reference and diffing. Do not edit.
• vendor/remoteyourcam-usb — unmodified upstream snapshot, for reference and diffing. Do not edit.
• android/ — our working app, seeded from vendor/open-eos-control/android and modified here.

License

Apache License 2.0 (same as both upstream projects). See LICENSE. Upstream copyright notices are preserved under vendor/*/NOTICE.txt and vendor/*/LICENSE.txt.