I would also be very interested.

The features that I would find useful would be to generate an interrupt
(toggle a pin?) whenever something enters a defined field within the range
of the device. This would be 3 - 4 inches. If a hand (or whatever) came
closer than 4 inches the unit would indicate that with a pin change
(toggle). The interface (serial) could then be used to determine range. The
defined field should be programmable so that I could set it to 4 inches, 40
inches, or whatever the min and max. values for the interface are.

Please keep me informed of any developments for this product.

PS It would have to work to -40 degrees C.

Guy