Fix live data refresh loop

menu.py

@@ -55,28 +55,39 @@ def live_data(connection):
         pause()
         return
 
-    commands = [
-        ("RPM", obd.commands.RPM),
-        ("Speed", obd.commands.SPEED),
-        ("Coolant Temp", obd.commands.COOLANT_TEMP),
-    ]
+    print("Live data running.")
+    print("Press Ctrl+C to stop and return to menu.\n")
 
-    for name, command in commands:
-        response = connection.query(command)
+    try:
+        while True:
+            rpm = connection.query(obd.commands.RPM)
+            speed = connection.query(obd.commands.SPEED)
+            coolant = connection.query(obd.commands.COOLANT_TEMP)
 
-        if response.is_null():
-            print(name + ": Not supported")
+            print("\nLive Data")
+            print("---------")
+
+            if rpm.is_null():
+                print("RPM: Not supported")
             else:
-            value = response.value
+                print("RPM:", rpm.value)
 
-            if name == "Speed":
-                value = value.to("mile_per_hour")
+            if speed.is_null():
+                print("Speed: Not supported")
+            else:
+                speed_mph = speed.value.to("mile_per_hour")
+                print("Speed:", speed_mph)
 
-            elif name == "Coolant Temp":
-                value = value.to("degF")
+            if coolant.is_null():
+                print("Coolant Temp: Not supported")
+            else:
+                coolant_f = coolant.value.to("degF")
+                print("Coolant Temp:", coolant_f)
 
-            print(name + ":", value)
+            time.sleep(1)
 
+    except KeyboardInterrupt:
+        print("\nStopped live data")
         pause()