how to connect arduino uno with nodemcu

how to connect nodemcu witn arduino uno ? and how to check it’s done ?

Why? You must have a reason to connect a board that can be programmed with the Arduino IDE to another Arduino. Tell us more. Leo..

as Leo asks. why? nodemcu is a development board with gpio pins programmable with Arduino IDE.

if you have a good reason for using two microcontrolers, then tell us, because it determines what type of connection you need.