Hello
I thinks some people have done a direct wiring mounting based on the simple schematic available in the wiki. I have build my prototype like this (see here: Implement on a Fiat F100 success - #4 by Tooki57). Tests showed that It works, but du to external factors (rain and after confined in Paris du to CODID crisis), I haven’t test it in operationnal conditions.
But I also encountered a bug, essentially when AOG have to make wide drive corrections, that is probably du to bad power input regulation and filtrations of LM2596, see here: Access to the port 'COM4' is denied - #13 by Math.
So I can’t garantee you that this simple electronic assemblie would work: peraps someone who has this kind of assembly functionnal can attest here.
Most people here use a PCB, that add the resistors/capacitors you are talking about, for filtering and decoupling function. PCB assembly is clearly more robust.
But what ever electronics assembly way you choise, with Sparkfun MMA, you need the 330Ohm resistors on SDA and SCL. The simple assembly showed on the wiki use the MMA board from Adafruit, which can be power supplied with 5V, that why there insn’t resistor on SDA and SCL on this schematics.
Math