A few days ago I asked a question about how I can connect the Esp8266 with the Arduino UNO via SPI, in the end I had an answer that worked perfectly for me, but another problem arose, and apparently I am not the only one.
Apparently many of the SD readers have a “defect”, and in various forums they suggest adding a triple buffer (I imagine it is an IC, but I have no idea what it is for), as I understand, this makes the SS pin not alter how the SD reader works (I have no idea why they did it that way).
So I need help to know how my Esp8266 (master) can control my Arduino UNO (slave) and SD reader. I think this is a hardware aspect, they say that you have to solder two pins, according to them, it would be to connect pins 8 and 13…
What I do not know is if connecting those two pins would already work as it should, I mean that I would not have to change the code or something like that. But there is another problem : ), I don’t have that version of SD reader, I have this one, which doesn’t have that IC.
Any way to use the SD reader and Arduino UNO to share the same SPI bus?