Add sensor fault simulation and health display

simulator/esp32_sim.py

@@ -13,6 +13,7 @@ class ESP32Simulator:
 
         self.wifi_override_until = 0
         self.ignition_on = True
+        self.failed_sensors = set()
         self.soc = 82.0
         self.last_update = time.time()
 
@@ -43,18 +44,23 @@ class ESP32Simulator:
         starlink_on = self.relays["starlink"]
         wifi_override_active = time.time() < self.wifi_override_until
 
+        sensor_names = [
+            "fridge_zone_1",
+            "fridge_zone_2",
+            "rear_seat",
+            "outside"
+        ]
+
         temps = {
-            "fridge_zone_1": self.sensor(36, 2),
-            "fridge_zone_2": self.sensor(12, 3),
-            "rear_seat": self.sensor(78, 8),
-            "outside": self.sensor(88, 8)
+            "fridge_zone_1": None if "fridge_zone_1" in self.failed_sensors else self.sensor(36, 2),
+            "fridge_zone_2": None if "fridge_zone_2" in self.failed_sensors else self.sensor(12, 3),
+            "rear_seat": None if "rear_seat" in self.failed_sensors else self.sensor(78, 8),
+            "outside": None if "outside" in self.failed_sensors else self.sensor(88, 8)
         }
 
         sensor_health = {
-            "fridge_zone_1": True,
-            "fridge_zone_2": True,
-            "rear_seat": True,
-            "outside": True
+            name: name not in self.failed_sensors
+            for name in sensor_names
         }
 
         remaining_ah = round(self.soc, 1)
@@ -108,5 +114,23 @@ class ESP32Simulator:
         self.ignition_on = not self.ignition_on
         return self.ignition_on
 
+    def toggle_sensor_fault(self, name):
+        valid = {
+            "fridge_zone_1",
+            "fridge_zone_2",
+            "rear_seat",
+            "outside"
+        }
+
+        if name not in valid:
+            return None
+
+        if name in self.failed_sensors:
+            self.failed_sensors.remove(name)
+            return False
+
+        self.failed_sensors.add(name)
+        return True
+
 
 esp32 = ESP32Simulator()