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Co-authored-by: Copilot <[email protected]>

modules/app_obd.py

@@ -22,6 +22,8 @@ throttle_position = None
 mil_on = None
 dtc_codes = []
 odometer = None
+mil_updated_at = None
+dtc_updated_at = None
 
 
 class OBD:
@@ -251,6 +253,18 @@ def obd_connection():
         _emit_disconnected()
 
 
+def get_fresh_mil(max_age=SENSOR_POLL_INTERVAL * 3):
+    if mil_updated_at is None or time.monotonic() - mil_updated_at > max_age:
+        return None
+    return mil_on
+
+
+def get_fresh_dtc_codes(max_age=SENSOR_POLL_INTERVAL * 3):
+    if dtc_updated_at is None or time.monotonic() - dtc_updated_at > max_age:
+        return []
+    return list(dtc_codes)
+
+
 def obd_speed():
     global speed, speed_updated_at
     with obd_speed_lock:
@@ -298,7 +312,7 @@ def _quantity_value(command, unit=None):
 
 def _poll_diagnostics():
     global coolant_temp, fuel_level, throttle_position
-    global mil_on, dtc_codes, odometer
+    global mil_on, dtc_codes, odometer, mil_updated_at, dtc_updated_at
 
     coolant_temp = _quantity_value(obd.commands.COOLANT_TEMP, "degC")
     fuel_level = _quantity_value(obd.commands.FUEL_LEVEL, "percent")
@@ -307,6 +321,7 @@ def _poll_diagnostics():
     status_response = _query(obd.commands.STATUS)
     if status_response is not None and not status_response.is_null():
         mil_on = bool(status_response.value.MIL)
+        mil_updated_at = time.monotonic()
         app_events.socketio.emit(
             "obd_mil",
             {"on": mil_on, "dtc_count": status_response.value.DTC_count},
@@ -318,6 +333,7 @@ def _poll_diagnostics():
             {"code": code, "description": description}
             for code, description in dtc_response.value
         ]
+        dtc_updated_at = time.monotonic()
         app_events.socketio.emit("obd_dtc", dtc_codes)
 
     odometer_response = _query(ODOMETER_COMMAND, force=True)