added POC for temperature logging

src/damaris/data/Temperature.py

@@ -15,17 +15,60 @@ from .Drawable import Drawable
 class TemperatureResult(Resultable, Drawable):
     """
     Specialised class of Resultable and Drawable
-    Contains recorded temperature data
+    Contains recorded temperature data.
+    
+    Attributes:
+        x: List of timestamps in seconds.
+        y: List of temperature readings in Celsius.
+        setpoint: Optional list of setpoint temperatures in Celsius.
+        xlabel: Label for x-axis (default: "Time (s)").
+        ylabel: Label for y-axis (default: "Temperature (C)").
     """
-    def __init__(self, x = None, y = None, desc = None, job_id = None, job_date = None):
+    def __init__(self, x = None, y = None, setpoint = None, desc = None, job_id = None, job_date = None):
         Resultable.__init__(self)
         Drawable.__init__(self)
         
+        # Set default labels
+        self.xlabel = "Time (s)"
+        self.ylabel = "Temperature (C)"
+        
+        # Initialize data lists
+        self.setpoint = [] if setpoint is None else setpoint
+
         if (x is None) and (y is None) and (desc is None) and (job_id is None) and (job_date is None):
-            pass
+            # Empty initialization - will be filled later
+            self.x = []
+            self.y = []
 
         elif (x is not None) and (y is not None) and (desc is not None) and (job_id is not None) and (job_date is not None):
-            pass
+            # Full initialization
+            self.x = x
+            self.y = y
+            self.description = desc
+            self.job_id = job_id
+            self.job_date = job_date
             
         else:
             raise ValueError("Wrong usage of __init__!")
+    
+    def get_number_of_channels(self):
+        """Returns 1 for temperature data."""
+        return 1
+    
+    def get_xdata(self):
+        """Returns the x data (timestamps)."""
+        return self.x
+    
+    def get_ydata(self, channel=0):
+        """Returns the y data (temperature readings)."""
+        if channel == 0:
+            return self.y
+        return []
+    
+    def __len__(self):
+        """Returns the number of data points."""
+        return len(self.y) if self.y else 0
+    
+    def __repr__(self):
+        """String representation of the temperature result."""
+        return f"TemperatureResult(points={len(self)}, job_id={self.job_id})"

src/damaris/gui/DamarisGUI.py

@@ -59,6 +59,7 @@ import matplotlib.figure
 from damaris.gui import ExperimentWriter, ExperimentHandling
 from damaris.gui import ResultReader, ResultHandling
 from damaris.gui import BackendDriver
+from damaris.gui.TemperatureMonitor import TemperatureMonitor
 #from damaris.gui.gtkcodebuffer import CodeBuffer, SyntaxLoader
 #from damaris.data import Drawable # this is a base class, it should be used...
 from damaris.data import DataPool, Accumulation, ADC_Result, MeasurementResult
@@ -181,6 +182,10 @@ class DamarisGUI:
         #to stop queued experiments
         self.stop_experiment_flag = threading.Event()
         
+        # Temperature monitoring
+        self.temp_monitor = None
+        self.temp_controller = None
+
         exp_script = ""
         if exp_script_filename is not None and exp_script_filename != "":
             self.sw.exp_script_filename = exp_script_filename[ : ]
@@ -572,6 +577,10 @@ class DamarisGUI:
         self.dump_filename = ""
         if actual_config[ "data_pool_name" ] != "":
             self.dump_states( init=True )
+        
+        # Start temperature monitoring if configured
+        self.start_temperature_monitoring(actual_config)
+        
         gobject.timeout_add( 200, self.observe_running_experiment )
 
     def observe_running_experiment( self ):
@@ -974,8 +983,91 @@ class DamarisGUI:
             still_running = [_f for _f in [ self.si.exp_handling, self.si.res_handling, self.si.back_driver ] if _f]
             for r in still_running:
                 r.quit_flag.set( )
+            
+            # Stop temperature monitoring
+            self.stop_temperature_monitoring()
+            
             self.state = DamarisGUI.Stop_State
 
+    def start_temperature_monitoring(self, config):
+        """
+        Start temperature monitoring thread if configured.
+        
+        Args:
+            config: Configuration dictionary from self.config.get()
+        """
+        # Check if temperature monitoring is enabled
+        if not config.get("enable_temperature_monitoring", False):
+            return
+        
+        controller_type = config.get("temperature_controller_type", "eurotherm")
+        temp_interval = config.get("temperature_interval", 2.0)
+        
+        try:
+            # Import the factory
+            from damaris.tools.temperature import create_controller
+            
+            # Create controller based on type
+            if controller_type == "eurotherm":
+                temp_device = config.get("temperature_device", "")
+                temp_baudrate = config.get("temperature_baudrate", 19200)
+                
+                if not temp_device:
+                    print("Temperature monitoring: No device configured for Eurotherm")
+                    return
+                
+                self.temp_controller = create_controller(
+                    "eurotherm", temp_device, baudrate=temp_baudrate
+                )
+                print(f"Temperature monitoring started with Eurotherm on {temp_device} (interval: {temp_interval}s)")
+                
+            elif controller_type == "simulated":
+                # Simulated controller doesn't need device configuration
+                # Use default parameters: 290K base, 10K amplitude, 60s period, 5% noise, 10% missing
+                self.temp_controller = create_controller("simulated")
+                print(f"Temperature monitoring started with simulated controller (interval: {temp_interval}s)")
+                
+            else:
+                print(f"Temperature monitoring: Unknown controller type: {controller_type}")
+                return
+            
+            # Create and start monitor thread
+            self.temp_monitor = TemperatureMonitor(
+                controller=self.temp_controller,
+                interval=temp_interval,
+                data_pool=self.data,
+                data_key="temperature"
+            )
+            self.temp_monitor.start()
+            
+        except Exception as e:
+            print(f"Failed to start temperature monitoring: {e}")
+            import traceback
+            traceback.print_exc()
+            self.temp_controller = None
+            self.temp_monitor = None
+
+    def stop_temperature_monitoring(self):
+        """
+        Stop the temperature monitoring thread if running.
+        """
+        if self.temp_monitor is not None:
+            try:
+                self.temp_monitor.stop()
+                print("Temperature monitoring stopped")
+            except Exception as e:
+                print(f"Error stopping temperature monitoring: {e}")
+            finally:
+                self.temp_monitor = None
+        
+        if self.temp_controller is not None:
+            try:
+                self.temp_controller.close()
+            except Exception as e:
+                print(f"Error closing temperature controller: {e}")
+            finally:
+                self.temp_controller = None
+
     def documentation_init( self ):
 
         self.doc_urls = {
@@ -2059,6 +2151,73 @@ class ConfigTab:
             backend_vbox.pack_start(self.config_adc_bit_depth_hbox, False, False, 0)
             self.config_adc_bit_depth_hbox.show_all()
 
+        # Temperature monitoring settings - single line layout
+        self.config_temp_hbox = gtk.HBox(homogeneous=False, spacing=6)
+        
+        # Controller type selector
+        self.config_temp_controller_type_label = gtk.Label(label="Controller:")
+        self.config_temp_controller_type_combobox = gtk.ComboBoxText()
+        self.config_temp_controller_type_combobox.append_text("eurotherm")
+        self.config_temp_controller_type_combobox.append_text("simulated")
+        self.config_temp_controller_type_combobox.set_active(0)  # Default to eurotherm
+        self.config_temp_controller_type_combobox.set_tooltip_text("Select temperature controller type")
+        self.config_temp_controller_type_combobox.connect("changed", self.on_temp_controller_type_changed)
+        
+        self.config_temp_controller_type_hbox = gtk.HBox(homogeneous=False, spacing=0)
+        self.config_temp_controller_type_hbox.pack_start(self.config_temp_controller_type_label, False, False, 0)
+        self.config_temp_controller_type_hbox.pack_start(self.config_temp_controller_type_combobox, False, False, 0)
+        self.config_temp_hbox.pack_start(self.config_temp_controller_type_hbox, False, False, 0)
+        
+        # Enable checkbox
+        self.config_temp_monitoring_checkbutton = gtk.CheckButton(label="Temp:")
+        self.config_temp_monitoring_checkbutton.set_tooltip_text("Enable periodic temperature reading from controller")
+        self.config_temp_hbox.pack_start(self.config_temp_monitoring_checkbutton, False, False, 0)
+        
+        # Device file chooser with entry (shown for eurotherm, hidden for simulated)
+        self.config_temp_device_entry = gtk.Entry()
+        self.config_temp_device_entry.set_tooltip_text("Serial port device (e.g., /dev/serial/by-id/...)")
+        self.config_temp_device_entry.set_width_chars(30)
+        self.config_temp_device_button = gtk.Button(label="...")
+        self.config_temp_device_button.set_tooltip_text("Browse for temperature controller device")
+        self.config_temp_device_button.connect("clicked", self.on_temp_device_browse_clicked)
+        
+        self.config_temp_device_hbox = gtk.HBox(homogeneous=False, spacing=0)
+        self.config_temp_device_hbox.pack_start(self.config_temp_device_entry, True, True, 0)
+        self.config_temp_device_hbox.pack_start(self.config_temp_device_button, False, False, 0)
+        self.config_temp_hbox.pack_start(self.config_temp_device_hbox, True, True, 0)
+        
+        # Interval spinbutton
+        self.config_temp_interval_label = gtk.Label(label="Interval (s):")
+        self.config_temp_interval_spinbutton = gtk.SpinButton.new_with_range(0.1, 60, 0.1)
+        self.config_temp_interval_spinbutton.set_value(2.0)  # Default to 2 seconds
+        self.config_temp_interval_spinbutton.set_tooltip_text("Time between temperature readings in seconds")
+        
+        self.config_temp_interval_hbox = gtk.HBox(homogeneous=False, spacing=6)
+        self.config_temp_interval_hbox.pack_start(self.config_temp_interval_label, False, False, 0)
+        self.config_temp_interval_hbox.pack_start(self.config_temp_interval_spinbutton, False, False, 0)
+        self.config_temp_hbox.pack_start(self.config_temp_interval_hbox, False, False, 0)
+        
+        # Baud rate (for eurotherm)
+        self.config_temp_baudrate_combobox = gtk.ComboBoxText()
+        self.config_temp_baudrate_combobox.append_text("19200")
+        self.config_temp_baudrate_combobox.append_text("9600")
+        self.config_temp_baudrate_combobox.append_text("38400")
+        self.config_temp_baudrate_combobox.append_text("57600")
+        self.config_temp_baudrate_combobox.append_text("115200")
+        self.config_temp_baudrate_combobox.set_active(0)
+        self.config_temp_baudrate_combobox.set_tooltip_text("Serial baud rate for temperature controller")
+        self.config_temp_baudrate_hbox = gtk.HBox(homogeneous=False, spacing=6)
+        self.config_temp_baudrate_hbox.pack_start(self.config_temp_baudrate_combobox, False, False, 0)
+        self.config_temp_hbox.pack_start(self.config_temp_baudrate_hbox, False, False, 0)
+        # Note: baud rate is shown for eurotherm, hidden for simulated
+        
+        # Set initial visibility based on controller type
+        self._update_temp_widgets_visibility()
+        
+        if backend_vbox:
+            backend_vbox.pack_start(self.config_temp_hbox, False, False, 0)
+            self.config_temp_hbox.show_all()
+
         # insert version informations
         components_text = """
 operating system %(os)s
@@ -2165,11 +2324,27 @@ pygobject version %(pygobject)s
             "data_pool_complib": complib,
             "data_pool_comprate": self.config_data_pool_comprate.get_value_as_int( ),
             "script_font": self.config_script_font_button.get_font_name( ),
-            "adc_bit_depth": self.config_adc_bit_depth_spinbutton.get_value_as_int()
+            "adc_bit_depth": self.config_adc_bit_depth_spinbutton.get_value_as_int(),
+            # Temperature monitoring configuration
+            "enable_temperature_monitoring": self.config_temp_monitoring_checkbutton.get_active(),
+            "temperature_controller_type": self.config_temp_controller_type_combobox.get_active_text(),
+            "temperature_device": self.config_temp_device_entry.get_text(),
+            "temperature_baudrate": self._get_temp_baudrate(),
+            "temperature_interval": self.config_temp_interval_spinbutton.get_value()
         }
         ADC_Result.default_bit_depth = actual_config["adc_bit_depth"]
         return actual_config
     
+    def _get_temp_baudrate(self):
+        """Get selected baud rate from combobox."""
+        active_text = self.config_temp_baudrate_combobox.get_active_text()
+        if active_text:
+            try:
+                return int(active_text)
+            except ValueError:
+                pass
+        return 19200
+
     def set( self, config ):
         if "start_backend" in config:
             self.config_start_backend_checkbutton.set_active( config[ "start_backend" ] )
@@ -2200,6 +2375,29 @@ pygobject version %(pygobject)s
                 ADC_Result.default_bit_depth = int(config["adc_bit_depth"])
             except (ValueError, TypeError):
                 pass
+        
+        # Temperature monitoring configuration
+        if "enable_temperature_monitoring" in config:
+            self.config_temp_monitoring_checkbutton.set_active(config["enable_temperature_monitoring"])
+        if "temperature_controller_type" in config:
+            controller_type = config["temperature_controller_type"]
+            if controller_type in ["eurotherm", "simulated"]:
+                self.config_temp_controller_type_combobox.set_active_text(controller_type)
+                # Update widget visibility based on type
+                self._update_temp_widgets_visibility()
+        if "temperature_device" in config:
+            self.config_temp_device_entry.set_text(config["temperature_device"])
+        if "temperature_baudrate" in config:
+            baudrate = str(config["temperature_baudrate"])
+            if baudrate in ["9600", "19200", "38400", "57600", "115200"]:
+                self.config_temp_baudrate_combobox.set_active_text(baudrate)
+            else:
+                self.config_temp_baudrate_combobox.set_active(0)  # Default to 19200
+        if "temperature_interval" in config:
+            try:
+                self.config_temp_interval_spinbutton.set_value(float(config["temperature_interval"]))
+            except (ValueError, TypeError):
+                self.config_temp_interval_spinbutton.set_value(2.0)
         if "data_pool_complib" in config:
             # find combo-box entry and make it active...
             model = self.config_data_pool_complib.get_model( )
@@ -2216,6 +2414,60 @@ pygobject version %(pygobject)s
     def on_adc_bit_depth_changed(self, widget):
         ADC_Result.default_bit_depth = widget.get_value_as_int()
 
+    def on_temp_device_browse_clicked(self, widget):
+        """
+        Open file chooser dialog to select temperature controller device.
+        Defaults to /dev/serial/by-id/ which is typically used for USB serial converters.
+        """
+        dialog = gtk.FileChooserDialog(
+            title="Select Temperature Controller Device",
+            parent=None,
+            action=gtk.FileChooserAction.OPEN,
+            buttons=(
+                gtk.STOCK_CANCEL, gtk.ResponseType.CANCEL,
+                gtk.STOCK_OPEN, gtk.ResponseType.OK
+            )
+        )
+        
+        # Set default folder to /dev/serial/by-id/ if it exists
+        default_folder = "/dev/serial/by-id/"
+        if os.path.isdir(default_folder):
+            dialog.set_current_folder(default_folder)
+        else:
+            # Fallback to /dev
+            dialog.set_current_folder("/dev/")
+        
+        # Only show regular files (device files)
+        dialog.set_select_multiple(False)
+        
+        response = dialog.run()
+        if response == gtk.ResponseType.OK:
+            selected_file = dialog.get_filename()
+            self.config_temp_device_entry.set_text(selected_file)
+        
+        dialog.destroy()
+
+    def on_temp_controller_type_changed(self, widget):
+        """Update widget visibility when controller type changes."""
+        self._update_temp_widgets_visibility()
+
+    def _update_temp_widgets_visibility(self):
+        """Show/hide widgets based on selected controller type."""
+        active_type = self.config_temp_controller_type_combobox.get_active_text()
+        
+        if active_type == "eurotherm":
+            # Show device selection widgets
+            self.config_temp_device_hbox.show()
+            self.config_temp_baudrate_hbox.show()
+        elif active_type == "simulated":
+            # Hide device-specific widgets for simulated controller
+            self.config_temp_device_hbox.hide()
+            self.config_temp_baudrate_hbox.hide()
+        else:
+            # Show everything for unknown types
+            self.config_temp_device_hbox.show()
+            self.config_temp_baudrate_hbox.show()
+
     def load_config_handler( self, widget ):
         if self.system_default_filename:
             self.load_config( self.system_default_filename )

src/damaris/gui/TemperatureMonitor.py

@@ -0,0 +1,159 @@
+# -*- coding: iso-8859-1 -*-
+"""
+Temperature monitoring thread.
+
+This module provides a thread that periodically reads temperature from a controller
+and stores it in a TemperatureResult object.
+"""
+
+import threading
+import time
+import datetime
+
+from damaris.data import TemperatureResult
+from damaris.tools.temperature import TemperatureController
+
+
+class TemperatureMonitor(threading.Thread):
+    """
+    Thread that periodically reads temperature from a controller
+    and stores it in a TemperatureResult object.
+    
+    This thread runs independently and can be configured with any
+    TemperatureController implementation (Eurotherm, Lakeshore, etc.).
+    
+    Attributes:
+        controller: The TemperatureController instance to read from.
+        interval: Polling interval in seconds.
+        result: The TemperatureResult object storing collected data.
+        quit_flag: Event to signal the thread to stop.
+        data_pool: Optional DataPool to store results.
+        data_key: Key to use when storing in data_pool.
+    """
+
+    def __init__(self, controller: TemperatureController,
+                 interval: float = 1.0,
+                 data_pool=None,
+                 data_key: str = "temperature"):
+        """
+        Initialize the temperature monitor.
+        
+        Args:
+            controller: TemperatureController implementation (Eurotherm, etc.)
+            interval: Polling interval in seconds (default: 1.0)
+            data_pool: Optional DataPool to store results (default: None)
+            data_key: Key to use when storing in data_pool (default: "temperature")
+        """
+        threading.Thread.__init__(self, name="TemperatureMonitor")
+        self.controller = controller
+        self.interval = float(interval)
+        self.data_pool = data_pool
+        self.data_key = data_key
+        self.quit_flag = threading.Event()
+        self.result = TemperatureResult()
+        self._running = False
+        self._lock = threading.RLock()
+        
+        # Initialize the result with metadata
+        self.result.xlabel = "Time (s)"
+        self.result.ylabel = "Temperature (C)"
+        self.result.description = {"type": "temperature_monitoring"}
+
+    def run(self):
+        """
+        Main thread loop: periodically reads temperature and stores it.
+        """
+        self._running = True
+        start_time = time.time()
+        
+        while not self.quit_flag.is_set() and self._running:
+            try:
+                # Read temperature and setpoint
+                timestamp = time.time() - start_time
+                current_temp = self.controller.get_temperature()
+                setpoint = self.controller.get_setpoint()
+                
+                # Store in result
+                with self._lock:
+                    if not hasattr(self.result, 'x'):
+                        self.result.x = []
+                        self.result.y = []
+                        self.result.setpoint = []
+                    
+                    self.result.x.append(timestamp)
+                    self.result.y.append(current_temp)
+                    self.result.setpoint.append(setpoint)
+                    
+                    # Update job metadata on first sample
+                    if len(self.result.x) == 1:
+                        self.result.job_date = datetime.datetime.now()
+                        self.result.job_id = id(self)
+                
+                # Optional: store in data_pool
+                if self.data_pool is not None:
+                    with self._lock:
+                        self.data_pool[self.data_key] = self.result
+                
+            except Exception as e:
+                print(f"TemperatureMonitor error: {e}")
+                import traceback
+                traceback.print_exc()
+            
+            # Sleep in small increments for responsive shutdown
+            sleep_remaining = self.interval
+            while sleep_remaining > 0 and not self.quit_flag.is_set() and self._running:
+                sleep_time = min(0.1, sleep_remaining)
+                self.quit_flag.wait(sleep_time)
+                sleep_remaining -= sleep_time
+
+    def stop(self):
+        """
+        Graceful shutdown: signal the thread to stop and wait for it.
+        """
+        self._running = False
+        self.quit_flag.set()
+        # Wait for the thread to finish its current iteration
+        self.join(timeout=self.interval + 0.5)
+
+    def reset(self):
+        """
+        Clear the collected data and start fresh.
+        """
+        with self._lock:
+            self.result = TemperatureResult()
+            self.result.xlabel = "Time (s)"
+            self.result.ylabel = "Temperature (C)"
+            self.result.description = {"type": "temperature_monitoring"}
+
+    def get_current_temperature(self) -> float:
+        """
+        Get the latest temperature reading.
+        
+        Returns:
+            float: Latest temperature in Celsius, or 0.0 if no data.
+        """
+        with self._lock:
+            if hasattr(self.result, 'y') and len(self.result.y) > 0:
+                return self.result.y[-1]
+            return 0.0
+
+    def get_current_setpoint(self) -> float:
+        """
+        Get the latest setpoint reading.
+        
+        Returns:
+            float: Latest setpoint in Celsius, or 0.0 if no data.
+        """
+        with self._lock:
+            if hasattr(self.result, 'setpoint') and len(self.result.setpoint) > 0:
+                return self.result.setpoint[-1]
+            return 0.0
+
+    def is_running(self) -> bool:
+        """
+        Check if the monitor is currently running.
+        
+        Returns:
+            bool: True if the monitor thread is active.
+        """
+        return self._running and not self.quit_flag.is_set()

src/damaris/tools/eurotherm.py

@@ -3,6 +3,8 @@ import re
 import operator
 from functools import reduce
 
+from .temperature import TemperatureController, register_controller
+
 
 DEBUG=False
 
@@ -40,7 +42,7 @@ def checksum(message):
 	bcc = (reduce(operator.xor, list(map(ord,message))))
 	return chr(bcc)
 
-class Eurotherm(object):
+class Eurotherm(TemperatureController):
 	def __init__(self, serial_device, baudrate = 19200):
 		self.device = standard_device
 		# timeout: 110 ms to get all answers.
@@ -100,6 +102,39 @@ class Eurotherm(object):
 	def get_setpoint_temperature(self):
 		return self.read_param('SL')
 
+	# TemperatureController interface implementation
+
+	def get_temperature(self) -> float:
+		"""Read current temperature in Celsius."""
+		temp = self.read_param('PV')
+		if temp is None:
+			return 0.0
+		try:
+			return float(temp)
+		except (ValueError, TypeError):
+			return 0.0
+
+	def get_setpoint(self) -> float:
+		"""Read target setpoint temperature in Celsius."""
+		temp = self.read_param('SL')
+		if temp is None:
+			return 0.0
+		try:
+			return float(temp)
+		except (ValueError, TypeError):
+			return 0.0
+
+	def set_setpoint(self, temperature: float) -> bool:
+		"""Set target temperature in Celsius."""
+		return self.write_param('SL', str(temperature))
+
+	def close(self):
+		"""Close the serial connection."""
+		if hasattr(self, 's') and self.s is not None:
+			if self.s.is_open:
+				self.s.close()
+			self.s = None
+
 if __name__ == '__main__':
 	import time
 	delta=5
@@ -118,3 +153,6 @@ if __name__ == '__main__':
 			f.write(l)
 			f.flush()
 		f.write('# MARK -- %s --\n'%(time.asctime()))
+
+# Register Eurotherm with the factory
+register_controller('eurotherm', Eurotherm)

src/damaris/tools/temperature.py

@@ -0,0 +1,143 @@
+# -*- coding: iso-8859-1 -*-
+"""
+Temperature controller interface and base classes.
+
+This module provides a consistent interface for temperature controllers
+to enable pluggable temperature monitoring systems.
+"""
+
+from abc import ABC, abstractmethod
+
+# Plugin registry for temperature controllers
+_controller_registry = {}
+
+
+def register_controller(name: str, controller_class):
+    """
+    Register a temperature controller implementation.
+    
+    Args:
+        name: Unique identifier for this controller type
+        controller_class: Class that implements TemperatureController
+    """
+    _controller_registry[name] = controller_class
+
+
+def create_controller(name: str, *args, **kwargs):
+    """
+    Create a temperature controller instance by name.
+    
+    Args:
+        name: Registered controller type name
+        *args: Positional arguments to pass to controller constructor
+        **kwargs: Keyword arguments to pass to controller constructor
+        
+    Returns:
+        TemperatureController: Instance of the requested controller
+        
+    Raises:
+        ValueError: If controller name is not registered and cannot be imported
+    """
+    # If not found, try to auto-import the module
+    if name not in _controller_registry:
+        # Map known controller names to their modules
+        module_map = {
+            'simulated': 'damaris.tools.temperature_simulator',
+            'eurotherm': 'damaris.tools.eurotherm',
+        }
+        if name in module_map:
+            try:
+                # Import the module which will register the controller
+                import importlib
+                importlib.import_module(module_map[name])
+            except ImportError as e:
+                raise ValueError(f"Failed to import controller '{name}': {e}. Available: {list(_controller_registry.keys())}")
+        
+        # Check again after import
+        if name not in _controller_registry:
+            raise ValueError(f"Unknown temperature controller: {name}. Available: {list(_controller_registry.keys())}")
+    
+    return _controller_registry[name](*args, **kwargs)
+
+
+def get_controller_names() -> list:
+    """
+    Get list of available controller names.
+    
+    Returns:
+        list: List of registered controller type names
+    """
+    return list(_controller_registry.keys())
+
+
+# Pre-register built-in controllers by importing their modules
+# This ensures they're available without explicit imports
+try:
+    from . import eurotherm
+except ImportError as e:
+    # Eurotherm may require serial module which might not be installed
+    # That's OK, it will be imported on-demand if needed
+    pass
+
+try:
+    from . import temperature_simulator
+except ImportError as e:
+    # Simulator should always work (no external dependencies)
+    # But if it fails, it will be imported on-demand
+    pass
+
+
+class TemperatureController(ABC):
+    """
+    Abstract base class for temperature controllers.
+    
+    All temperature controller implementations (Eurotherm, Lakeshore, etc.)
+    should inherit from this class and implement the abstract methods.
+    """
+
+    @abstractmethod
+    def get_temperature(self) -> float:
+        """
+        Read current temperature in Celsius.
+        
+        Returns:
+            float: Current temperature in degrees Celsius.
+            
+        Raises:
+            IOError: If communication with the device fails.
+            RuntimeError: If the device is not ready or returns invalid data.
+        """
+        pass
+
+    @abstractmethod
+    def get_setpoint(self) -> float:
+        """
+        Read the target setpoint temperature in Celsius.
+        
+        Returns:
+            float: Target temperature in degrees Celsius.
+        """
+        pass
+
+    @abstractmethod
+    def set_setpoint(self, temperature: float) -> bool:
+        """
+        Set the target temperature setpoint.
+        
+        Args:
+            temperature: Target temperature in degrees Celsius.
+            
+        Returns:
+            bool: True if the setpoint was successfully set, False otherwise.
+        """
+        pass
+
+    def close(self):
+        """
+        Clean up resources (e.g., close serial connections).
+        
+        This method should be called when the controller is no longer needed.
+        The default implementation does nothing; subclasses should override
+        if they have resources to clean up.
+        """
+        pass

src/damaris/tools/temperature_simulator.py

@@ -0,0 +1,126 @@
+# -*- coding: iso-8859-1 -*-
+"""
+Simulated temperature controller for testing.
+
+Provides a temperature controller that simulates real temperature readings
+with configurable parameters including sinusoidal variation, noise, and missing values.
+"""
+
+import time
+import math
+import random
+import threading
+
+from .temperature import TemperatureController, register_controller
+
+
+class SimulatedTemperatureController(TemperatureController):
+    """
+    A simulated temperature controller that generates realistic temperature readings.
+    
+    This controller is useful for testing and development without requiring
+    physical hardware. It simulates temperature readings with:
+    - Base temperature around 290K (17C)
+    - Sinusoidal variation with amplitude of 10K
+    - 5% random noise
+    - 10% probability of missing values (returns previous value)
+    - 60 second period for the sine wave
+    
+    Attributes:
+        base_temp: Base temperature in Kelvin (default: 290.0)
+        amplitude: Amplitude of sinusoidal variation in Kelvin (default: 10.0)
+        period: Period of sine wave in seconds (default: 60.0)
+        noise_level: Fraction of random noise (default: 0.05 = 5%)
+        missing_probability: Probability of missing value (default: 0.10 = 10%)
+    """
+
+    def __init__(self, base_temp: float = 290.0, amplitude: float = 10.0, 
+                 period: float = 60.0, noise_level: float = 0.05,
+                 missing_probability: float = 0.10):
+        """
+        Initialize the simulated temperature controller.
+        
+        Args:
+            base_temp: Base temperature in Kelvin (default: 290.0)
+            amplitude: Amplitude of sinusoidal variation in Kelvin (default: 10.0)
+            period: Period of sine wave in seconds (default: 60.0)
+            noise_level: Fraction of random noise (default: 0.05 = 5%)
+            missing_probability: Probability of missing value (default: 0.10 = 10%)
+        """
+        self.base_temp = float(base_temp)
+        self.amplitude = float(amplitude)
+        self.period = float(period)
+        self.noise_level = float(noise_level)
+        self.missing_probability = float(missing_probability)
+        
+        self._start_time = time.time()
+        self._lock = threading.RLock()
+        self._setpoint = self.base_temp
+        self._last_temp = self.base_temp
+        self._last_reading_time = self._start_time
+
+    def get_temperature(self) -> float:
+        """
+        Get simulated current temperature in Kelvin.
+        
+        Returns:
+            float: Simulated temperature in Kelvin
+        """
+        with self._lock:
+            elapsed = time.time() - self._start_time
+            current_time = time.time()
+            
+            # Calculate ideal sinusoidal temperature
+            temp = self.base_temp + self.amplitude * math.sin(2 * math.pi * elapsed / self.period)
+            
+            # Add 5% random noise
+            noise = temp * self.noise_level * (random.random() * 2 - 1)  # -5% to +5%
+            temp += noise
+            
+            # 10% chance of missing value (return last good value)
+            if random.random() < self.missing_probability:
+                temp = self._last_temp
+            else:
+                self._last_temp = temp
+                self._last_reading_time = current_time
+            
+            return temp
+
+    def get_setpoint(self) -> float:
+        """
+        Get the target setpoint temperature in Kelvin.
+        
+        Returns:
+            float: Target temperature in Kelvin
+        """
+        with self._lock:
+            return self._setpoint
+
+    def set_setpoint(self, temperature: float) -> bool:
+        """
+        Set the target temperature setpoint.
+        
+        Args:
+            temperature: Target temperature in Kelvin
+            
+        Returns:
+            bool: True if successful, False otherwise
+        """
+        with self._lock:
+            self._setpoint = float(temperature)
+            return True
+
+    def close(self):
+        """Clean up resources."""
+        pass
+    
+    def reset(self):
+        """Reset the simulation to initial state."""
+        with self._lock:
+            self._start_time = time.time()
+            self._last_temp = self.base_temp
+            self._last_reading_time = self._start_time
+
+
+# Register the simulated controller with the factory
+register_controller('simulated', SimulatedTemperatureController)