Ray,
Another possibility is to use the app Pocket RxTx available from the Google Play Store at
.
Pocket RxTx?doesn't need a lot of horsepower so?will work with an older (or current) Android phone or tablet that can use?an OTG cable.
Connection is USB so a normal Yaesu CAT cable is needed or can be by bluetooth with a special adapter plugged into the back of the rig.
73, Bob GM4CID