You are an expert and I’m so ignorant that I can’t understand you…
Can you please tell me what’s PB1, PB2, PB4?
If I understood correctly, I have to drive 4 wires from the pins on the SD reader to the Seeeduino board.
So, the corrispondence could be:
10 -> PB4
11 -> PB2
12 -> PB2
13 -> PB1
Is that right or is it in another order? If it’s correct, I just have to understand what PB1, PB2, PB4 are…