I need to communicate by wire two Arduino boards that are next to each other.
The first one is reading the pulses of an encoder at the maximum speed that the Arduino gives. The second will catch the value of the first to send it by RF, show it on a screen, etc.
I need to know the fastest way to communicate between two boards (SPI, I2C, Serial, etc). The value to read is an 8-bit number, I'm thinking of using 8 pins to make a parallel communication that's the same as fast, right?
Thanks a lot.