It felt like the buffer was not completely cleared & the motor was turning against it's will . Some times it tries to rotate completely, but couldn't & the slow response is due to the delay's I used on both the boards.
Also can I communicate between ATtiny85/45 & Arduino UNo using I2C. Separate I2C lines are not present in ATtinys. So we might need an USI-I2C converter sort of thing .
I'm asking this because I want to replace my Arduino-2 with n ATtiny. Is that possible?