metrics: suppress stale climate when controller offline

src/metrics/TyphonMetrics.ts

@@ -231,6 +231,11 @@ export class TyphonMetrics {
         new_framework_device:
           controller.newFrameworkDevice === null ? "unknown" : String(controller.newFrameworkDevice)
       }).set(1);
+      // AC Infinity returns stale snapshots while controllers are offline.
+      // Keep online/info visibility, but suppress climate/fan gauges until controller is online again.
+      if (!controller.online) {
+        continue;
+      }
       this.temperatureCelsius.labels(controllerLabels).set(controller.temperatureCelsius);
       this.relativeHumidityRatio.labels(controllerLabels).set(controller.relativeHumidityRatio);
       this.relativeHumidityPercent.labels(controllerLabels).set(controller.relativeHumidityRatio * 100);

tests/TyphonMetrics.test.ts

@@ -76,7 +76,7 @@ describe("TyphonMetrics", () => {
     const metrics = new TyphonMetrics("0.1.0", false, registry);
 
     const snapshot = new ClimateSnapshot(1_700_000_050, [
-      new ControllerClimate("c2", "Tent B", false, 22.2, 0.40, 0.8, null, null, [
+      new ControllerClimate("c2", "Tent B", true, 22.2, 0.40, 0.8, null, null, [
         new PortClimate(2, "Fan B", "outlet", false, false, 0, 3, 0, true, null, AcInfinityMode.Unknown)
       ])
     ]);
@@ -110,6 +110,51 @@ describe("TyphonMetrics", () => {
     })).toBe(1);
   });
 
+  it("suppresses stale climate and fan gauges when controller is offline", async () => {
+    const registry = new Registry();
+    const metrics = new TyphonMetrics("0.1.0", false, registry);
+
+    const snapshot = new ClimateSnapshot(1_700_000_060, [
+      new ControllerClimate("c3", "Tent C", false, 23.1, 0.42, 1.1, 11, false, [
+        new PortClimate(3, "Fan C", "interior", true, true, 7, 8, 2, true, 1500, AcInfinityMode.Auto)
+      ])
+    ]);
+
+    metrics.updateFromSnapshot(snapshot);
+    const json = await registry.getMetricsAsJSON();
+
+    expect(valueForMetric(json, "typhon_controller_online", {
+      controller_id: "c3",
+      controller_name: "Tent C"
+    })).toBe(0);
+    expect(valueForMetric(json, "typhon_controller_info", {
+      controller_id: "c3",
+      controller_name: "Tent C",
+      device_type: "11",
+      new_framework_device: "false"
+    })).toBe(1);
+
+    expect(valueForMetric(json, "typhon_temperature_celsius", {
+      controller_id: "c3",
+      controller_name: "Tent C"
+    })).toBeNull();
+    expect(valueForMetric(json, "typhon_relative_humidity_percent", {
+      controller_id: "c3",
+      controller_name: "Tent C"
+    })).toBeNull();
+    expect(valueForMetric(json, "typhon_vpd_kpa", {
+      controller_id: "c3",
+      controller_name: "Tent C"
+    })).toBeNull();
+    expect(valueForMetric(json, "typhon_fan_speed_level", {
+      controller_id: "c3",
+      controller_name: "Tent C",
+      port: "3",
+      port_name: "Fan C",
+      fan_group: "interior"
+    })).toBeNull();
+  });
+
   it("tracks polling failures", async () => {
     const registry = new Registry();
     const metrics = new TyphonMetrics("0.1.0", false, registry);