What is this?

Rust wrappers around the Bumble Python API.

Method calls are mapped to the equivalent Python, and return types adapted where relevant.

See the CLI in src/main.rs or the examples directory for how to use the Bumble API.

Usage

Set up a virtualenv for Bumble, or otherwise have an isolated Python environment for Bumble and its dependencies.

Due to Python being [picky about how its sys path is set up](https://github.com/PyO3/pyo3/issues/1741, it's necessary to explicitly point to the virtualenv's site-packages. Use suitable virtualenv paths as appropriate for your OS, as seen here running the battery_client example:

PYTHONPATH=..:~/.virtualenvs/bumble/lib/python3.10/site-packages/ \
    cargo run --example battery_client -- \
    --transport android-netsim --target-addr F0:F1:F2:F3:F4:F5

Run the corresponding battery_server Python example, and launch an emulator in Android Studio (currently, Canary is required) to run netsim.

CLI

Explore the available subcommands:

PYTHONPATH=..:[virtualenv site-packages] \
    cargo run --features bumble-tools --bin bumble -- --help

Notable subcommands:

• firmware realtek download: download Realtek firmware for various chipsets so that it can be automatically loaded when needed
• usb probe: show USB devices, highlighting the ones usable for Bluetooth

Development

Run the tests:

PYTHONPATH=.. cargo test

Check lints:

cargo clippy --all-targets

Code gen

To have the fastest startup while keeping the build simple, code gen for assigned numbers is done with the gen_assigned_numbers tool. It should be re-run whenever the Python assigned numbers are changed. To ensure that the generated code is kept up to date, the Rust data is compared to the Python in tests at pytests/assigned_numbers.rs.

To regenerate the assigned number tables based on the Python codebase:

PYTHONPATH=.. cargo run --bin gen-assigned-numbers --features dev-tools