diff --git a/module.py b/module.py
new file mode 100644
--- /dev/null
+++ b/module.py
@@ -0,0 +1,92 @@
+from abc import ABCMeta, abstractmethod
+import uuid
+
+class ModuleList():
+    
+    def __init__(self):
+        self._modules = []
+        
+    def add_module(self, module):
+        assert isinstance(module, Module), 'invalid module'
+        if module in self._modules:
+            raise ValueError('Module %s already in database' % module)
+        else:
+            self._modules.append(module)
+            
+    def remove_module(self, module):
+        assert isinstance(Module, module), 'invalid module'
+        try:
+            self._module.remove(module)
+        except ValueError:
+            raise ValueError('Module %s is not in database' % module)
+        
+    def lookup_module(self, uuid):
+        for module in self._modules:
+            if module.uuid == uuid:
+                return module
+            
+    def new_module(self, device_type, address, interface):
+        
+        if device_type == 0x01:
+            module = AirSenseModule(device_type, address, interface)
+        elif device_type == 0x02:
+            module = RelayDriveModule(device_type, address, interface)
+        else:
+            module = UnknownModule(device_type, address, interface)
+        
+        self.add_module(module)
+        
+        return module
+
+class Module(metaclass=ABCMeta):
+
+    def __init__(self, device_type, address, interface):
+        self.device_type = device_type
+        self.address = address
+        self.interface = interface
+        
+        self.uuid = uuid.uuid1()
+        print("Created new module! " + str(self.uuid))
+    
+    @abstractmethod
+    def send_message(self):
+        pass
+    
+    @abstractmethod
+    def receive_message(self):
+        pass
+
+class AirSenseModule(Module):
+    
+    def __init__(self, device_type, address, interface):
+        super(AirSenseModule, self).__init__(device_type, address, interface)
+    
+    def send_message(self):
+        message = None
+        self.interface.network.send_message(message)
+    
+    def receive_message(self):
+        print("AirSenseModule receive message!")
+
+class RelayDriveModule(Module):
+    
+    def __init__(self, device_type, address, interface):
+        super(RelayDriveModule, self).__init__(device_type, address, interface)
+    
+    def send_message(self):
+        pass
+    
+    def receive_message(self):
+        print("RelayDriveModule receive message!")
+
+class UnknownModule(Module):
+    
+    def __init__(self, device_type, address, interface):
+        super(UnknownModule, self).__init__(device_type, address, interface)
+    
+    def send_message(self):
+        pass
+    
+    def receive_message(self):
+        print("UnknownModule receive message!")
+