Struct PassiveMonitor

pub struct PassiveMonitor { /* private fields */ }

Passive monitor for Aranet devices using BLE advertisements.

This allows monitoring multiple devices without establishing connections, which is useful for scenarios where:

• You need to monitor more devices than the BLE connection limit
• Low power consumption is important
• Real-time data isn’t critical (advertisement interval is typically 4+ seconds)

Implementations

impl PassiveMonitor

pub fn new(options: PassiveMonitorOptions) -> Self

Create a new passive monitor with the given options.

pub fn subscribe(&self) -> Receiver<PassiveReading>

Subscribe to passive readings.

Returns a receiver that will receive readings as they are detected.

pub fn subscriber_count(&self) -> usize

Get the number of active subscribers.

pub fn start( self: &Arc<Self>, cancel_token: CancellationToken, ) -> JoinHandle<()>

Start the passive monitor.

This spawns a background task that continuously scans for BLE advertisements and parses Aranet device data.

The task stops as soon as the cancellation token is triggered, even while it gets the Bluetooth adapter, scans or waits.

pub async fn get_last_reading( &self, device_id: &str, ) -> Option<AdvertisementData>

Get the last known reading for a device.

pub async fn known_devices(&self) -> Vec<String>

Get all known device IDs.

pub async fn clear_cache(&self)

Clear the reading cache.

Trait Implementations

impl Default for PassiveMonitor

fn default() -> Self

Returns the “default value” for a type.