Hello PaulS
If I wanted to implement the menu structure, would it be viable to have an ATTiny85 preform the measurement of the ultrasonic transducer, i.e. generate the pulse train, get the analog out from the Transducer and then communicate this value via I2C to my main processor which would then implement the menu structure.
So when I wanted to display the measurement I just read it via the I2C communication with the main micro controller and when I need to access the menu I don't read the value and run my menu functions? Let me know if this could work. Thanks in advance.
Dirk