Hi, last weekend, after a lot of not-working tries, I was able to Hack my Canon X-07 Serial port
w/ a ProMini 5v-16MHz Arduino Chip.
I used the 'CustomSerialPort' Arduino lib (& bugfixed two issues) in order to transform the X-07 inverted logic TTL 4800,8N2 to (USBable) regular TTL 115200,8N1 ; so I can connect as well a "computer" or other Arduino boards.
I won't stop here : I started to mount a SPI uSDCard reader & built a tiny command interpreter in order to control SDCard from PC or from X-07 side.
On the 1st picture, you can see a "DIR" demo,
on the others, U can see that I used a regular DB9 male (180° reverted) to connect to the Hand Held Cpt.