add query specific peripheral state command.

src-tauri/src/cmd/mod.rs

@@ -1,6 +1,9 @@
 use std::sync::Arc;
 
-use btleplug::api::{Central as _, Peripheral as _};
+use btleplug::{
+    api::{Central as _, Peripheral as _},
+    platform::PeripheralId,
+};
 pub use state::{CentralState, ChannelState, PeripheralItem};
 use tauri::{async_runtime::RwLock, AppHandle, Emitter, State};
 
@@ -79,6 +82,24 @@ pub async fn connected_peripheral_state(
     }
 }
 
+#[tauri::command]
+pub async fn specific_peripheral_state(
+    app_state: State<'_, Arc<RwLock<AppState>>>,
+    id: PeripheralId,
+) -> Result<PeripheralItem, errors::AppError> {
+    let state = app_state.read().await;
+    let central = state
+        .get_central_adapter()
+        .await
+        .ok_or(errors::AppError::BluetoothAdapterNotFound)?;
+    let peripheral = central
+        .peripheral(&id)
+        .await
+        .map_err(|_| errors::AppError::UnableToRetrievePeripheralState)?;
+    let properties = peripheral.properties().await.unwrap_or(None);
+    Ok(PeripheralItem::new(&peripheral, properties.as_ref()).await)
+}
+
 #[tauri::command]
 pub async fn channel_a_state(
     _app_state: State<'_, Arc<RwLock<AppState>>>,

src-tauri/src/lib.rs

@@ -55,6 +55,7 @@ pub fn run() {
         .invoke_handler(generate_handler![
             cmd::central_device_state,
             cmd::connected_peripheral_state,
+            cmd::specific_peripheral_state,
             cmd::channel_a_state,
             cmd::channel_b_state,
             cmd::activate_central_adapter,