SW-2348 implement not powered air filter screen

octoprint_mrbeam/__init__.py

@@ -2940,6 +2940,7 @@ def get_mrb_state(self):
                     fan_state=self.dust_manager.get_fan_state(),
                     fan_rpm=self.dust_manager.get_fan_rpm(),
                     fan_dust=self.dust_manager.get_dust(),
+                    fan_external_power=self.airfilter.external_power,
                     compressor_state=self.compressor_handler.get_current_state(),
                     lid_fully_open=self.lid_handler.is_lid_open(),
                     interlocks_closed=self.iobeam.is_interlock_closed(),

octoprint_mrbeam/iobeam/airfilter.py

@@ -228,6 +228,13 @@ def temperatures(self):
             }
         return None
 
+    @property
+    def external_power(self):
+        if self.is_airfilter3():
+            return self._external_power
+        else:
+            return None
+
     def set_airfilter(self, model_id, serial):
         """Sets the air filter.
 
@@ -391,8 +398,6 @@ def pressure_drop_prefilter(self):
 
     @property
     def connected(self):
-        if self.is_airfilter3() and not self._external_power:
-            return False
         return self._connected
 
     @connected.setter

octoprint_mrbeam/iobeam/compressor_handler.py

@@ -190,6 +190,8 @@ def _handle_dynamic_data(self, payload):
                         )
                 else:
                     self._num_rpm_0 = 0
+            elif "rpm_actual" in dataset and not self._printer.is_printing():
+                self._num_rpm_0 = 0
         else:
             self._logger.warn(
                 "Received empty compressor_dynamic_data dataset. compressor_dynamic_data: %s",