Phew! Tonight after work, I managed to connect smart sensors and motors from Lego EV3 to Arduino. Had to solder a cable. And order a connector on Amazon. In the photo, the color sensor is connected, with an IR sensor lying next to it. Both have microprocessors, communicating via a serial bus (UART). The motors are simpler. Stepper and regular ones.
Hi, I'm Rauf Aliev. 