I’m sure this will seem really basic and obvious, but it isn’t (yet) to me. I’d appreciate some guidance.
I have an Arduino Uno and a Seeed CAN Bus Shield V2.0 (https://wiki.seeedstudio.com/CAN-BUS_Shield_V2.0/#schematic-online-viewer)
I would like to pass through some signals (buttons, LEDs, etc.), but confess that I’m not understanding what I’m seeing on the schematic. Things like MISO, MOSI, SCL, SDA, and SCK all look like they are used by the shield, so would that leave IO7 - IO4 available? Have I an reasonable understanding? Yes, I could (and will) also try it to see if it works, but I’d appreciate some pointers on interpreting the schematic.
Thanks so very much for your time and assistance.