I have the following hardware that mounts on top of Arduino Uno:
I need to connect it to Raspberry Pi, which can be done using this shield:
The shield will take a while to arrive, and I want to start prototyping ASAP. Can I use a regular breadboard (or even simple jumper cables) instead of the shield, or are there additional HW requirements (capacitors, resistors, etc.) that should be taken into account?