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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Counterpart to the Python example `battery_server.py`.
//!
//! Start an Android emulator from Android Studio, or otherwise have netsim running.
//!
//! Run the server from the project root:
//! ```
//! PYTHONPATH=. python examples/battery_server.py \
//! examples/device1.json android-netsim
//! ```
//!
//! Then run this example from the `rust` directory:
//!
//! ```
//! PYTHONPATH=..:/path/to/virtualenv/site-packages/ \
//! cargo run --example battery_client -- \
//! --transport android-netsim \
//! --target-addr F0:F1:F2:F3:F4:F5
//! ```
use bumble::wrapper::{
device::{Device, Peer},
profile::BatteryServiceProxy,
transport::Transport,
PyObjectExt,
};
use clap::Parser as _;
use log::info;
use owo_colors::OwoColorize;
use pyo3::prelude::*;
#[pyo3_asyncio::tokio::main]
async fn main() -> PyResult<()> {
env_logger::builder()
.filter_level(log::LevelFilter::Info)
.init();
let cli = Cli::parse();
let transport = Transport::open(cli.transport).await?;
let device = Device::with_hci(
"Bumble",
"F0:F1:F2:F3:F4:F5",
transport.source()?,
transport.sink()?,
)?;
device.power_on().await?;
let conn = device.connect(&cli.target_addr).await?;
let mut peer = Peer::new(conn)?;
for mut s in peer.discover_services().await? {
s.discover_characteristics().await?;
}
let battery_service = peer
.create_service_proxy::<BatteryServiceProxy>()?
.ok_or(anyhow::anyhow!("No battery service found"))?;
let mut battery_level_char = battery_service
.battery_level()?
.ok_or(anyhow::anyhow!("No battery level characteristic"))?;
info!(
"{} {}",
"Initial Battery Level:".green(),
battery_level_char
.read_value()
.await?
.extract_with_gil::<u32>()?
);
battery_level_char
.subscribe(|_py, args| {
info!(
"{} {:?}",
"Battery level update:".green(),
args.get_item(0)?.extract::<u32>()?,
);
Ok(())
})
.await?;
// wait until user kills the process
tokio::signal::ctrl_c().await?;
Ok(())
}
#[derive(clap::Parser)]
#[command(author, version, about, long_about = None)]
struct Cli {
/// Bumble transport spec.
///
/// <https://google.github.io/bumble/transports/index.html>
#[arg(long)]
transport: String,
/// Address to connect to
#[arg(long)]
target_addr: String,
}
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