feat(ws_bridge): add report_unknown option for GPS trackers

components/ws_bridge/README.md

@@ -534,6 +534,7 @@ ws_bridge:
 |--------|:--------:|-------------|
 | `unique_id` / `name` | ✓ | Same as every other platform |
 | `latitude` / `longitude` | ✓ | Float or `!lambda`. Return `NAN` when there's no fix yet — Home Assistant then shows the tracker as unavailable rather than pinning it at 0,0 |
+| `report_unknown` | | Default `true`. When `latitude`/`longitude` are `NAN`, send `"unknown"` so Home Assistant marks the tracker unavailable. Set `false` to skip the update and leave the last reported coordinates in place |
 | `gps_accuracy` | | Float or `!lambda`, meters. Home Assistant uses it when deciding zone membership |
 | `icon` | | Same as every other platform |
 | `update_interval` | | Default `60s` |

components/ws_bridge/__init__.py

@@ -52,6 +52,7 @@
     CONF_ON_DECLARE,
     CONF_TRACKERS,
     CONF_GPS_ACCURACY,
+    CONF_REPORT_UNKNOWN,
     CONF_PING_INTERVAL,
     CONF_PONG_TIMEOUT,
     CONF_RECONNECT_TIMEOUT,
@@ -90,6 +91,7 @@
         cv.Required(CONF_LATITUDE): cv.templatable(cv.float_),
         cv.Required(CONF_LONGITUDE): cv.templatable(cv.float_),
         cv.Optional(CONF_GPS_ACCURACY): cv.templatable(cv.float_),
+        cv.Optional(CONF_REPORT_UNKNOWN, default=True): cv.boolean,
     }
 ).extend(cv.polling_component_schema("60s"))
 
@@ -350,6 +352,7 @@ async def to_code(config):
         if CONF_GPS_ACCURACY in conf:
             acc_template = await cg.templatable(conf[CONF_GPS_ACCURACY], [], cg.float_)
             cg.add(tracker.set_gps_accuracy(acc_template))
+        cg.add(tracker.set_report_unknown(conf[CONF_REPORT_UNKNOWN]))
 
     for conf in config.get(CONF_ENTITIES, []):
         await to_code_entity_ref(var, conf)

components/ws_bridge/const.py

@@ -23,6 +23,7 @@
 
 CONF_TRACKERS = "trackers"
 CONF_GPS_ACCURACY = "gps_accuracy"
+CONF_REPORT_UNKNOWN = "report_unknown"
 CONF_UPDATE_ID = "update_id"
 CONF_BUTTON_ID = "button_id"
 CONF_SENSOR_ID = "sensor_id"

components/ws_bridge/ws_bridge_tracker.cpp

@@ -28,12 +28,15 @@ void WsBridgeTracker::ws_bridge_declare() {
 void WsBridgeTracker::publish_position_() {
   float lat = this->latitude_.value();
   float lon = this->longitude_.value();
-  // No fix yet, or the source sensor has no state. Report the position as
-  // explicitly unknown rather than sending the coordinates anyway: a NaN that
-  // serializes badly, or a zeroed pair, would put the device at 0,0 — a spot
-  // in the Atlantic that Home Assistant can't tell apart from a real reading.
+  // No fix yet, or the source sensor has no state. Never send the coordinates
+  // anyway: a NaN that serializes badly, or a zeroed pair, would put the
+  // device at 0,0 — a spot in the Atlantic that Home Assistant can't tell
+  // apart from a real reading. When report_unknown_ is true, send "unknown" so
+  // HA marks the tracker unavailable; otherwise skip the update and leave the
+  // last reported coordinates in place.
   if (std::isnan(lat) || std::isnan(lon)) {
-    this->parent_->send_state_string(this->unique_id_, "unknown");
+    if (this->report_unknown_)
+      this->parent_->send_state_string(this->unique_id_, "unknown");
     return;
   }
   this->parent_->send_state_object(this->unique_id_, [this, lat, lon](JsonObject value) {

components/ws_bridge/ws_bridge_tracker.h

@@ -25,6 +25,7 @@ class WsBridgeTracker : public PollingComponent, public WsBridgeDevice {
     this->gps_accuracy_ = v;
     this->has_gps_accuracy_ = true;
   }
+  void set_report_unknown(bool report_unknown) { this->report_unknown_ = report_unknown; }
 
   void dump_config() override;
   void update() override;
@@ -39,6 +40,7 @@ class WsBridgeTracker : public PollingComponent, public WsBridgeDevice {
   TemplatableValue<float> longitude_{};
   TemplatableValue<float> gps_accuracy_{};
   bool has_gps_accuracy_{false};
+  bool report_unknown_{true};
 };
 
 }  // namespace ws_bridge

tests/components/ws_bridge/test.esp32-idf.yaml

@@ -49,6 +49,12 @@ ws_bridge:
       longitude: !lambda return 126.9780;
       gps_accuracy: 8
       update_interval: 30s
+    - unique_id: car_location_stale
+      name: "Car Location (keep last fix)"
+      latitude: !lambda return NAN;
+      longitude: !lambda return NAN;
+      report_unknown: false
+      update_interval: 30s
   # Exposes existing, locally-declared entities (below) without a parallel
   # `platform: ws_bridge` entity per value — see the README's "Exposing
   # existing entities" section. unique_id/name default to the source's own