+ Added function to exit app

holland/main.py

@@ -99,6 +99,9 @@ freq = {
     "C2":  5322,
 }
 
+def cbButtonMenu(button_id):
+	restart_to_default()
+	
 def cbButtonCall(button_id):
 	sim800.speakervolume(100)
 	show_screen(0x000000, 0xFFFFFF, "TONE")
@@ -156,6 +159,12 @@ def cbButtonHash(button_id):
 	vip = False
 	ugfx.display_image(0, 0, "holland/brenno.png")
 
+Buttons.enable_interrupt(
+	Buttons.BTN_Menu,
+	cbButtonMenu,
+	on_press=True,
+	on_release=False);
+		
 Buttons.enable_interrupt(
 	Buttons.BTN_Call,
 	cbButtonCall,