An EV3 G-block, can set SensorPort (1,2,3,4), UART baudrate , T/R mode et.. like putchar、 getchar functions in C language. Using IIC(I2C) G-block also can read or write 1 byte or 8 bytes with MCUS, but I want to try UART communication betweet EV3 and MCUs. By using this G-block, many MCU resourses ( IO ,PWM,AD et..) can be controled by EV3 only use ONE block and It is very hard to find a MCU has no UART port. Can anybody help me ? (maybe my question is very stupid, It's impossible to make such a block.) Thank you !