autopilot for a sailing boat

[vincenthure]

I am working to use RPI and Sense Hat to make a autopilot for a sailing boat.
I need to use PWM output to drive a motor to push and pull the rudder.
I use a MD10C board from Cytron to connect to the motor.
On RPI I have to connect the pin 12 ( GPIO 18 ) to the pwm input of the MD10C and pin 11 ( GPIO 17 ) for reverse mode.
My little problem is how to access to the pin!
I think about two solutions :
1/ solder from the butom of the RPI board ( not very elegant )
2/ solder inside the connecteur of the Sense Hat ( can't take it off after )

If you have any other idea...

[thagrol]

A stacking header and an extra PCB/piece of strip board.

Put your circuit and connectors on the PCB, plug it into your Pi and plug your sense hat on top.

For example (other products and suppliers exst):
https://shop.pimoroni.com/collections/r ... i-mini-kit
https://shop.pimoroni.com/collections/r ... y-pi-2-b-a

[vincenthure]

Thank you
great solution