$$ Connect Two Arduino Boards using Serial communication

$-$Board $1$ has push button, and LED.

Board $2$ has LCD connected to output pin, and push button

Pressing the pushbutton on board $1$ would toggle between

Clear the LCD $($connected to Board $2)$

$*$ Display "Serial UART Msg$"$

Pressing the push button on Board $2$ would toggle the LED connected to Board $1$

Please include arduino uno code and wiring schemaic$/$diagram