One item.. If your Motor home is a gasser (Do not know if this applies to Diesels) and has an OBD II connector then you have a little something you can get from your cellular phone provider.. If you have a SMART PHONE this is a great device for several reasons.. I have a stripped down version in my car.
The Cellular one provides several features
It monitors the engine computer (Mine too)
Allows your Smart PHone to connect via Blue Tooth, or Wi-Fi and display several missing gauges (Mine is BT only)
Allows you to connect to the internet via Wi-Fi (and possibly Blue tooth) (mine does not have this feature)
Allows you to access the device over the web.
KNOWS WHERE IT IS (GPS built in)
And may even allow you to send a "kill" command to the Engine control computer
(useful when the police are chaseing)
Imagine that.. Your Rig rolls off without you.. You get out your phone, buzz the Fuzz, My RV has been stolen it's a Make/Model/Color/License and is currently north bound on I-95 at Mile Markewr 50 per GPS.
Going to be a good day for some Law enforcement officer.
(As a retired police dispatcher Been there and done that as it were)