Arduino Esp8266 Kullanımı. The following picture shows the connection between the esp8266 nodemcu and the arduino uno. Technically any digital pin will work for communication between the arduino and the esp8266 as long as you modify line 11.
It is no problem to connect the arduino and the nodemcu directly even if the operating voltage for the arduino is 5v and for the nodemcu is 33v because the nodemcu digital pins are 5v tolerant and protected from over voltage. Ad the ultimate sbc superstore with all of the biggest brands. You will be powering the arduino through its usb port this will also be how you communicate to the esp8266.
Esp8266 ch pd breadboard 33v.
Connect the arduinos 3v3 33v output to esp8266. Connect the res or reset pin when you ground the reset pin the arduino works as a dumb usb to serial connector which is what we want to talk to the esp8266. Wire the esp8266 module the arduino uno and the breadboard as seen in the image. The script can be used for arduino esp8266 or esp32 microcontrollers.