Let me explain me better. On a board I'll hook up a vibration sensor that will be sticked to a door, and when somebody knocks the door, the ESP8266 will react and will send some value (an integer, for example). Then, the other ESP8266, which connects on the other board will recieve that value, and an LCD screen will show a message that somebody's knocking the door.
I have figured out the code for the sensor and for the LCD screen, unfortunately I'm a plain newbie with the ESP8266. How can I set one module to send data and how can I set the other one to recieve that data? Thanks for the help you can provide me, and sorry if my question is too silly.