v0.11.6

src/protocol/gree/polling.rs

@@ -1,4 +1,17 @@
 impl GreeClient {
+    /// Measure a minimal GREE round-trip without mutating persisted/live device state.
+    /// Diagnostics must not alter online/error counters, ownership, readings or capabilities.
+    pub async fn probe(&self, device: &Device) -> Result<u64> {
+        if device.simulated { return Ok(0); }
+        let key = device.key.as_deref().filter(|value| !value.is_empty())
+            .ok_or_else(|| anyhow!("device is not bound"))?;
+        let started = Instant::now();
+        let response = self.status_request(device, key, &["Pow"]).await?;
+        let mut snapshot = device.clone();
+        self.apply_status(&mut snapshot, &response)?;
+        Ok(started.elapsed().as_millis().min(u64::MAX as u128) as u64)
+    }
+
     pub async fn poll(&self, device: &mut Device) -> Result<()> {
         let key = device.key.clone().ok_or_else(|| anyhow!("device is not bound"))?;
         let full_cols = [