Popups done, Readout Screen prepared, Small fixes

biogascontrollerapp/gui/home/home.kv

@@ -37,10 +37,10 @@
                 font_size: 13
                 pos_hint: {"y": -0.45, "x":0.05}
             Button:
-                text: "Settings"
+                text: "About"
                 font_size: 13
                 size_hint: 0.07, 0.06
                 pos_hint: {"x":0.01, "y":0.01}
                 background_color: (50, 0, 0, 0.2)
                 on_release:
-                    root.to_settings()
+                    root.to_about()

biogascontrollerapp/gui/home/home.py

@@ -1,16 +1,29 @@
 from kivy.uix.screenmanager import Screen
 from kivy.lang import Builder
-
+from gui.popups.popups import QuitPopup, SingleRowPopup, TwoActionPopup
+from lib.com import Com
 
 class HomeScreen(Screen):
+    def __init__(self, com: Com, **kw):
+        self._com = com;
+        super().__init__(**kw)
+
     def start(self):
-        pass
+        if self._com.connect(19200):
+            self.manager.current = 'main'
+            self.manager.transition.direction = 'right'
+        else:
+            TwoActionPopup().open('Failed to connect', 'Details', self.open_details_popup)
+            print('ERROR connecting')
+
+    def open_details_popup(self):
+        print( 'Details' )
 
     def quit(self):
-        pass
+        QuitPopup(self._com).open()
 
-    def to_settings(self):
-        self.manager.current = 'settings'
+    def to_about(self):
+        self.manager.current = 'about'
         self.manager.transition.direction = 'down'