if I purchase the simpleRTK2B v3, will ardusimple add the headers, I don’t see this option. I wish to also buy the ‘Raspberry Pi adapter for simpleRTK2B’ and connect the simpleRTK2B v3 to my new raspberry pi 4. I just am on a tight budget and I don’t want to buy the adapter if I can’t attach the v3 board.
For the simpleRTK2B V3 we also offer the possibility to solder headers but is not off the shelf product, so it’s a bit more expensive.
Regarding your second question, yes, you can also connect V3 via USB to Rpi, or wire pin by pin the uart lines.