6 releases
0.3.0-alpha.1 | Dec 9, 2021 |
---|---|
0.2.1 | Jul 30, 2021 |
0.1.2 | Jul 21, 2021 |
0.1.0 | Nov 29, 2020 |
#732 in Hardware support
170KB
4K
SLoC
gatt
Bluetooth Low Energy Generic Attribute Profile
ref BLUETOOTH CORE SPECIFICATION Version 5.1 | Vol 3, Part G Generic Attribute Profile (GATT)
Example
use gatt::{CharacteristicProperties, Registration, Server};
use gatt::services as srv;
use gatt::characteristics as ch;
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
enum Token {
DeviceName,
BatteryLevelNotify,
}
fn new_registration() -> Registration<Token> {
let mut registration = Registration::new();
registration.add_primary_service(srv::GENERIC_ACCESS);
registration.add_characteristic_with_token(
Token::DeviceName,
ch::DEVICE_NAME,
"abc",
CharacteristicProperties::WRITE,
);
registration.add_characteristic(
ch::APPEARANCE,
0x03c0u16.to_le_bytes().to_vec(),
CharacteristicProperties::READ,
);
registration.add_primary_service(srv::GENERIC_ATTRIBUTE);
registration.add_characteristic(
ch::SERVICE_CHANGED,
"",
CharacteristicProperties::INDICATE,
);
registration.add_primary_service(srv::DEVICE_INFORMATION);
registration.add_characteristic(
ch::MANUFACTURER_NAME_STRING,
"機械",
CharacteristicProperties::READ,
);
registration.add_characteristic(
ch::MODEL_NUMBER_STRING,
"A123",
CharacteristicProperties::READ,
);
registration.add_characteristic(
ch::SERIAL_NUMBER_STRING,
"333-444",
CharacteristicProperties::READ,
);
registration.add_primary_service(srv::BATTERY);
registration.add_characteristic_with_token(
Token::BatteryLevelNotify,
ch::BATTERY_LEVEL,
"",
CharacteristicProperties::NOTIFY,
);
registration
}
#[tokio::main(flavor = "current_thread")]
async fn main() -> anyhow::Result<()> {
use std::io::stdin;
use tokio::task::spawn_blocking;
use tokio::io::AsyncWriteExt;
let mut server = Server::bind()?;
let mut connection = server.accept(new_registration()).await?.unwrap();
let mut events = connection.events();
let mut notification = connection.notification(&Token::BatteryLevelNotify)?;
let task = connection.run();
tokio::pin!(task);
let mut n = 0;
loop {
tokio::select! {
r = Pin::new(&mut task) => {
r?;
break;
}
maybe_line = spawn_blocking(|| stdin().read_line(&mut String::new())) => {
maybe_line??;
notification.write_all(&[n]).await?;
n += 1;
}
event = events.next() => {
if let Some(event) = event {
println!("{:?}", event);
}
}
}
}
// ...
# Ok(())
}
Supported target
- x86_64-unknown-linux-gnu
Tested on Linux 5.13 (Arch Linux)
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.!
License: MIT OR Apache-2.0
Dependencies
~4–12MB
~136K SLoC