On Nov 23, 4:12*pm, "Paul Remde" wrote:
Hi Paul,

The iPAQ 310 uses low voltage (3.3v) pseudo RS-232, so you'll need a cable
with an RS-232 voltage level converter. *I sell them hehttp://www.cumulus-soaring.com/goddard.htm#I310-PS5a-1


and on the website

The cable includes an inline RS-232 voltage level converter which
converts the RS-232 standard signal levels to 3.3 volts as required by
the iPAQ 310.

Would this be a simple resistive divider or have you found something
much more complex is required?

Andy