diff --git a/src/core/atcore.h b/src/core/atcore.h
index 54b3990..905e481 100644
--- a/src/core/atcore.h
+++ b/src/core/atcore.h
@@ -1,623 +1,623 @@
 /* AtCore
     Copyright (C) <2016 - 2019>
 
     Authors:
         Tomaz Canabrava <tcanabrava@kde.org>
         Chris Rizzitello <rizzitello@kde.org>
         Patrick José Pereira <patrickjp@kde.org>
         Lays Rodrigues <lays.rodrigues@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 #pragma once
 
 #include <QObject>
 #include <QSerialPort>
 #include <QSerialPortInfo>
 
 #include "ifirmware.h"
 #include "temperature.h"
 #include "atcore_export.h"
 
 class SerialLayer;
 class IFirmware;
 class QTime;
 
 /**
  * @brief The AtCore class
  * aims to provides a high level interface for serial based gcode devices<br />
  *
  * #### General Workflow
  * - Connect to a serial port with newConnection()
  * - Send commands to the device (pushCommand(), print(), ...)
  * - AtCore::close() when you are all done.
 
  * #### How AtCore Finds Plugins.
  * AtCore will check each directory below for plugins.
  *  1. QApplication::applicationDirPath/plugins (runtime)
  *  2. QApplication::applicationDirPath/AtCore (runtime)
  *  3. QApplication::applicationDirPath/../PlugIns/AtCore (runtime)
  *  4. Fullpath of KDE_PLUGIN_DIR (buildtime)
  *  5. Qt Plugin path/AtCore (runtime)
  *  6. ECM set KDE PLUGIN DIR  (buildtime)
  *  7. Build Dir/plugins (buildtime)
  */
 class ATCORE_EXPORT AtCore : public QObject
 {
     Q_OBJECT
-    Q_PROPERTY(QString version READ version)
+    Q_PROPERTY(QString version READ version CONSTANT)
     Q_PROPERTY(QStringList availableFirmwarePlugins READ availableFirmwarePlugins)
     Q_PROPERTY(int extruderCount READ extruderCount WRITE setExtruderCount NOTIFY extruderCountChanged)
     Q_PROPERTY(int temperatureTimerInterval READ temperatureTimerInterval WRITE setTemperatureTimerInterval NOTIFY temperatureTimerIntervalChanged);
     Q_PROPERTY(int serialTimerInterval READ serialTimerInterval WRITE setSerialTimerInterval NOTIFY serialTimerIntervalChanged)
     Q_PROPERTY(QStringList serialPorts READ serialPorts NOTIFY portsChanged)
     Q_PROPERTY(float percentagePrinted READ percentagePrinted NOTIFY printProgressChanged)
-    Q_PROPERTY(QStringList portSpeeds READ portSpeeds)
+    Q_PROPERTY(QStringList portSpeeds READ portSpeeds CONSTANT)
     Q_PROPERTY(QString connectedPort READ connectedPort)
     Q_PROPERTY(AtCore::STATES state READ state WRITE setState NOTIFY stateChanged)
     Q_PROPERTY(bool sdMount READ isSdMounted WRITE setSdMounted NOTIFY sdMountChanged)
     Q_PROPERTY(QStringList sdFileList READ sdFileList NOTIFY sdCardFileListChanged)
 
     friend class AtCoreTests;
     //Add friends as Sd Card support is extended to more plugins.
     friend class RepetierPlugin;
     friend class MarlinPlugin;
     //friend class SmoothiePlugin;
     //friend class TeacupPlugin;
     //friend class AprinterPlugin;
     //friend class SprinterPlugin;
 
 public:
     /**
      * @brief STATES enum Possible states the printer can be in
      */
     enum STATES {
         DISCONNECTED,   //!< Not Connected to a printer, initial state
         CONNECTING,     //!<Attempting to connect, Fw not probed
         IDLE,           //!<Connected to printer and ready for commands
         BUSY,           //!<Printer is Printing or working
         PAUSE,          //!<Printer is paused
         ERRORSTATE,     //!<Printer Returned Error
         STOP,           //!<Stop Printing and Clean Queue
         STARTPRINT,     //!<Just Starting a print job
         FINISHEDPRINT,  //!<Just Finished print job
     };
     Q_ENUM(STATES)
     /**
      * @brief The AXES enum - Printer Axes.
      */
     enum AXES {
         X = 1 << 0, //!<X Axis: X Motor
         Y = 1 << 1, //!<Y Axis Y Motor
         Z = 1 << 2, //!<Z Axis Z Motor
         E = 1 << 3, //!<E Axis: Extruder Motor 0
     };
     Q_ENUM(AXES)
     /**
      * @brief The UNITS enum - Possible Mesurment Units
      */
     enum UNITS {
         METRIC,     //!< Metric Units (Meters)
         IMPERIAL    //!< Imperial Units (Feet)
     };
     Q_ENUM(UNITS)
     /**
      * @brief AtCore create a new instance of AtCore
      * @param parent: parent of the object
      */
     explicit AtCore(QObject *parent = nullptr);
     ~AtCore() = default;
 
     /**
      * @brief version
      * @return Version number
      */
     QString version() const;
 
     /**
      * @brief Returns a List of detected serial ports
      * @return List of detected ports
      * @sa newConnection(), serial(), closeConnection()
      */
     QStringList serialPorts() const;
 
     /**
      * @brief connectedPort
      * @return the port atcore is connected to or empty string if none
      */
     QString connectedPort() const;
 
     /**
      * @brief Connect to a device.
      * @param port: the port to initialize
      * @param baud: the baud of the port
      * @param fwName: Firmware name of plugin to use (will try to autodetect if fwName is unknown)
      * @param disableROC: atcore will attempt to disable reset on connect for this device.
      * @return True is connection was successful
      * @sa serialPorts(), serial(), closeConnection()
      */
     Q_INVOKABLE bool newConnection(const QString &port, int baud, const QString &fwName, bool disableROC = false);
 
     /**
      * @brief Returns a list of valid baud speeds
      */
     QStringList portSpeeds() const;
 
     /**
      * @brief Close the current serial connection
      * @sa newConnection(), serial(), serialPorts(), close()
      */
     Q_INVOKABLE void closeConnection();
 
     /**
      * @brief Main access to the loaded firmware plugin
      * @return IFirmware * to currently loaded plugin
      * @sa availableFirmwarePlugins(), loadFirmwarePlugin()
      */
     Q_INVOKABLE IFirmware *firmwarePlugin() const;
 
     /**
      * @brief List of available firmware plugins
      * @sa loadFirmwarePlugin(), firmwarePlugin()
      */
     QStringList availableFirmwarePlugins() const;
 
     /**
      * @brief Get Printer state
      * @return State of the printer
      * @sa setState(), stateChanged(), AtCore::STATES
      */
     AtCore::STATES state();
 
     /**
      * @brief extruderCount
      * @return The number of detected Extruders Default is 1
      * @sa setExtruderCount(int newCount), extruderCountChanged(int newCount)
      */
     int extruderCount() const;
 
     /**
      * @brief Return printed percentage
      * @sa printProgressChanged()
      */
     float percentagePrinted() const;
 
     /**
      * @brief The temperature of the current hotend as told by the Firmware.
      */
     Temperature &temperature() const;
 
     /**
     * @brief Return the amount of miliseconds the serialTimer is set to. 0 = Disabled
     */
     int serialTimerInterval() const;
 
     /**
     * @brief Return the amount of miliseconds the temperatureTimer is set to. 0 = Disabled
     */
     int temperatureTimerInterval() const;
 
     /**
      * @brief Attempt to Mount an sd card
      * @param slot: Sd card Slot on machine (0 is default)
      */
     Q_INVOKABLE void mountSd(uint slot = 0);
 
     /**
      * @brief Attempt to Unmount an sd card
      * @param slot: Sd card Slot on machine (0 is default)
      */
     Q_INVOKABLE void umountSd(uint slot = 0);
 
     /**
      * @brief sdFileList
      * @return List of files on the sd card.
      */
     QStringList sdFileList();
 
     /**
      * @brief Check if an sd card is mounted on the printer
      * @return True if card mounted
      */
     bool isSdMounted() const;
 
 signals:
 
     /**
      * @brief Message emit from atcore these should be displayed to the user for debug.
      *
      * Possable Messages Are:
      *   - Waiting for firmware detect.
      *   - No Plugin found for (detected FW)
      *   - Failed to open device in Read / Write mode.
      *   - Device Errors.
      * @param msg: the message.
      */
     void atcoreMessage(const QString &msg);
 
     /**
      * @brief New number of extruders
      * @sa extruderCount(), setExtruderCount(int newCount)
      */
     void extruderCountChanged(const int newCount);
 
     /**
      * @brief Print job's precentage changed.
      * @param newProgress : Message
      * @sa percentagePrinted()
      */
     void printProgressChanged(const float newProgress);
 
     /**
      * @brief New message was received from the printer
      * @param message: Message that was received
      */
     void receivedMessage(const QByteArray &message);
 
     /**
     * @brief New interval for serial timer
     * @sa setSerialTimerInterval()
     */
     void serialTimerIntervalChanged(const int newTime);
 
     /**
     * @brief New interval for temperature timer
     * @sa setTemperatureTimerInterval()
     */
     void temperatureTimerIntervalChanged(const int newTime);
 
     /**
      * @brief The Printer's State Changed
      * @param newState : the new state of the printer
      * @sa setState(), state(), AtCore::STATES
      */
     void stateChanged(AtCore::STATES newState);
 
     /**
      * @brief Available serialports Changed
      */
     void portsChanged(const QStringList &portList);
 
     /**
      * @brief Sd Card Mount Changed
      */
     void sdMountChanged(bool newState);
 
     /**
      * @brief The files on the sd card have changed.
      */
     void sdCardFileListChanged(const QStringList &fileList);
 
     /**
      * @brief pushedCommand via serialLayer connect this to your log to see send commands
      * @param comm: the command sent.
      */
     void pushedCommand(const QByteArray &comm);
 
 public slots:
 
     /**
      * @brief Set the printers state
      * @param state : printer state.
      * @sa state(), stateChanged(), AtCore::STATES
      */
     void setState(AtCore::STATES state);
 
     /**
      * @brief Push a command into the command queue
      *
      * @param comm : Command
      */
     Q_INVOKABLE void pushCommand(const QString &comm);
 
     /**
      * @brief Public Interface for printing a file
      * @param fileName: the gcode file to print.
      * @param sdPrint: set true to print fileName from Sd card
      */
     Q_INVOKABLE void print(const QString &fileName, bool sdPrint = false);
 
     /**
      * @brief Stop the Printer by empting the queue and aborting the print job (if running)
      * @sa emergencyStop(), pause(), resume()
      */
     Q_INVOKABLE void stop();
 
     /**
      * @brief stop the printer via the emergency stop Command (M112)
      * @sa stop(), pause(), resume()
      */
     Q_INVOKABLE void emergencyStop();
 
     /**
      * @brief pause an in process print job
      *
      * Sends M114 on pause to store the location where the head stoped.
      * This is known to cause problems on fake printers
      * @param pauseActions: Gcode to run after pausing commands are ',' separated
      * @sa resume(), stop(), emergencyStop()
      */
     void pause(const QString &pauseActions);
 
     /**
      * @brief resume a paused print job.
      * After returning to location pause was triggered.
      * @sa pause(), stop(), emergencyStop()
      */
     Q_INVOKABLE void resume();
 
     /**
      * @brief Send home \p axis command
      * @param axis: the axis(es) to home (use X Y Z or any combo of)
      * @sa home(), move()
      */
     Q_INVOKABLE void home(uchar axis);
 
     /**
      * @brief Send home all command
      * @sa home(uchar axis), move()
      */
     Q_INVOKABLE void home();
 
     /**
      * @brief Set extruder temperature
      * @param temp : new temperature
      * @param extruder : extruder number
      * @param andWait: True for heat and ignore commands until temperature is reached
      */
     Q_INVOKABLE void setExtruderTemp(uint temp = 0, uint extruder = 0, bool andWait = false);
 
     /**
      * @brief move an axis of the printer
      * @param axis the axis to move AXES (X Y Z E )
      * @param arg the distance to move the axis or the place to move to depending on printer mode
      * @sa home(), home(uchar axis), move(QLatin1Char axis, int arg)
      */
     Q_INVOKABLE void move(AtCore::AXES axis, double arg);
 
     /**
      * @brief move an axis of the printer
      * @param axis the axis to move AXES (X Y Z E )
      * @param arg the distance to move the axis or the place to move to depending on printer mode
      * @sa home(), home(uchar axis), move(AtCore::AXES, int arg)
      */
     Q_INVOKABLE void move(QLatin1Char axis, double arg);
 
     /**
      * @brief Set the bed temperature
      * @param temp : new temperature
      * @param andWait: True for heat and ignore commands until temperature is reached
      * @sa setExtruderTemp()
      */
     Q_INVOKABLE void setBedTemp(uint temp = 0, bool andWait = false);
 
     /**
      * @brief setFanSpeed set the fan speed
      * @param fanNumber: fan number
      * @param speed: new speed of the fan 0-100
      */
     Q_INVOKABLE void setFanSpeed(uint speed = 0, uint fanNumber = 0);
 
     /**
      * @brief Set printer to absolute position mode
      * @sa setRelativePosition()
      */
     Q_INVOKABLE void setAbsolutePosition();
 
     /**
      * @brief Set printer to relative position mode
      * @sa setAbsolutePosition()
      */
     Q_INVOKABLE void setRelativePosition();
 
     /**
      * @brief Disable motors after a delay
      * @param delay: Seconds until motors are disabled. 0= No delay
      */
     Q_INVOKABLE void disableMotors(uint delay = 0);
 
     /**
      * @brief set the Printers speed
      * @param speed: speed in % (default is 100);
      */
     Q_INVOKABLE void setPrinterSpeed(uint speed = 100);
 
     /**
      * @brief set extruder Flow rate
      * @param rate: flow rate in % (default is 100)
      */
     Q_INVOKABLE void setFlowRate(uint rate = 100);
 
     /**
      * @brief close any open items.
      * You should call this on close events to force any stuck jobs to close
      * @sa closeConnection()
      */
     Q_INVOKABLE void close();
 
     /**
      * @brief showMessage push a message to the printers LCD
      * @param message: message to show on the LCD
      */
     Q_INVOKABLE void showMessage(const QString &message);
 
     /**
      * @brief setUnits sets the measurement units do be used
      * @param units : the measurement units to use(METRIC / IMPERIAL)
      * @sa AtCore::UNITS
      */
     Q_INVOKABLE void setUnits(AtCore::UNITS units);
 
     /**
      * @brief Set the time between checks for new serialPorts (0 is default)
      * @param newTime: Milliseconds between checks. values <= 0 will Disable Checks.
      */
     void setSerialTimerInterval(int newTime);
 
     /**
      * @brief Set the time between checks for new Temperature (5000 is default on new connections)
      * @param newTime: Milliseconds between checks. values <= 0 will Disable Checks.
      */
     void setTemperatureTimerInterval(int newTime);
 
     /**
      * @brief delete file from sd card
      */
     Q_INVOKABLE void sdDelete(const QString &fileName);
 
     /**
      * @brief Queue the Printer for status of sd card print
      */
     void sdCardPrintStatus();
 
 private slots:
     /**
      * @brief processQueue send commands from the queue.
      */
     void processQueue();
 
     /**
      * @brief Send M105 to the printer if one is not in the Queue
      */
     void checkTemperature();
 
     /**
      * @brief Connect to SerialLayer::receivedCommand
      * @param message: new message.
      */
     void newMessage(const QByteArray &message);
 
     /**
      * @brief Connect to SerialLayer::pushedCommand
      * @param command: newCommand.
      */
     void newCommand(const QByteArray &command);
 
     /**
      * @brief Search for firmware string in message.
      * A Helper function for Firmware detection
      * @param message
      */
     void findFirmware(const QByteArray &message);
 
     /**
      * @brief Search for new serial ports
      */
     void locateSerialPort();
 
     /**
      * @brief Attempts to disableResetOnConnect for the selected port.
      * @param port: the port.
      */
     void disableResetOnConnect(const QString &port);
 
     /**
      * @brief Send request to the printer for the sd card file list.
      */
     void getSDFileList();
 
     /**
      * @brief Handle serial Errors.
      */
     void handleSerialError(QSerialPort::SerialPortError error);
 
 private:
 
     /**
      * @brief Load A firmware plugin
      * @param fwName : name of the firmware
      * @sa firmwarePlugin(), availableFirmwarePlugins()
      */
     Q_INVOKABLE void loadFirmwarePlugin(const QString &fwName);
 
     /**
      * @brief True if a firmware plugin is loaded
      */
     bool firmwarePluginLoaded() const;
 
     /**
      * @brief True if a serial port is initialized
      */
     bool serialInitialized() const;
 
     /**
      * @brief send firmware request to the printer
      */
     void requestFirmware();
 
     /**
      * @brief Search for atcore firmware plugins
      * @param path: the path to check
      * @return QMap of the plugings found
      */
     QMap<QString, QString> findFirmwarePlugins(const QString &path);
 
     /**
      * @brief returns AtCorePrivate::sdCardReadingFileList
      * @return True if printer is returning sd card file list
      */
     bool isReadingSdCardList() const;
 
     /**
      * @brief stops print just for sd prints used internally
      * @sa stop(), emergencyStop()
      */
     void stopSdPrint();
 
     /**
      * @brief New connections need to wait for the machine to be ready if it needs reboot
      * @param message: message from the firmware
      * @param fwName: fwName to load
      */
     void waitForPrinterReboot(const QByteArray &message, const QString &fwName);
 
     /**
      * @brief Hold private data of AtCore.
      */
     struct AtCorePrivate;
     AtCorePrivate *d;
 
 protected:
     /**
      * @brief Set the number of extruders on the machine.
      * @param newCount
      * @sa extruderCount(), extruderCountChanged(int newCount)
      */
     void setExtruderCount(int newCount);
     /**
      * @brief Append a file to AtCorePrivate::sdCardFileList.
      * @param fileName: new FileName
      */
     void appendSdCardFileList(const QString &fileName);
 
     /**
      * @brief Clear AtCorePrivate::sdCardFileList.
      */
     void clearSdCardFileList();
 
     /**
      * @brief Set if the sd card is mounted by the printer
      * @param mounted: True is mounted
      */
     void setSdMounted(const bool mounted);
 
     /**
      * @brief set AtCorePrivate::sdCardReadingFileList
      * @param readingList set true if reading file list
      */
     void setReadingSdCardList(bool readingList);
 };