Hi Stefan,

I've done a few numeric entry routines in the past - the easiest way is to put each keystroke in a buffer, & decode it all when the "enter/*" key is pushed. Also, you can see at this point if enough keys have been pushed (if not, beep & rewind everything!). If you are using the # (value 11) to set up for 2 or 3 keys(?), just set a couter to 2 or 3, & wait for the keys to be pressed. Allow a time-out of 10S or so (if no-one touches the kbd, things should all go back to the 1st state).
We've discussed debouncing & stuff here before, so search for that.

mfg

Richard