Fix gcode bug and add mqtt fan speed getters

bambulabs_api/mqtt_client.py

@@ -457,7 +457,8 @@ def __send_gcode_line(self, gcode_command: str) -> bool:
         Args:
             gcode_command (str): G-code command to send to the printer
         """
-        return self.__publish_command({"print": {"command": "gcode_line",
+        return self.__publish_command({"print": {"sequence_id": "0",
+                                                 "command": "gcode_line",
                                                  "param": f"{gcode_command}"}})
 
     def send_gcode(self, gcode_command: str | list[str]) -> bool:
@@ -490,6 +491,42 @@ def set_bed_temperature(self, temperature: int) -> bool:
         """
         return self.__send_gcode_line(f"M140 S{temperature}\n")
 
+    def get_fan_gear(self):
+        """
+        Get fan_gear
+
+        Returns:
+            int: consolidated fan value for part, aux and chamber fan speeds
+        """
+        return self.__get("fan_gear", 0)
+
+    def get_part_fan_speed(self):
+        """
+        Get part fan speed
+
+        Returns:
+            int: 0-255 value representing part fan speed
+        """
+        return self.get_fan_gear() % 256
+
+    def get_aux_fan_speed(self):
+        """
+        Get auxiliary fan speed
+
+        Returns:
+            int: 0-255 value representing auxiliary fan speed
+        """
+        return ((self.get_fan_gear() >> 8)) % 256
+
+    def get_chamber_fan_speed(self):
+        """
+        Get chamber fan speed
+
+        Returns:
+            int: 0-255 value representing chamber fan speed
+        """
+        return self.get_fan_gear() >> 16
+
     def set_part_fan_speed(self, speed: int | float) -> bool:
         """
         Set the fan speed of the part fan