Yes you need to use an RS232 to TTL level converter chip. I use the MAX202 but there are lots of them. You then connect the chip to pins 0 & 1.
But, other than the fact that I could use other digital ports
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16