Two switches at input lines provide manual digital inputs $(0/1)$ to the first Arduino. These inputs are read only when the trigger switch is triggered $($manually$).$ After reading the inputs, Arduino #$1$ should display the read values on its console, and transmit them to Arduino #$2$ which then should also display them on its own console and on external LEDs $($outputs$).$ Only pins $2$ and $3$ can be used for interrupts.Arduino #$1$ provides data through two output pins connected to corresponding input pins on Arduino #$2.$ Arduino #$1$ signals Arduino #$2$ about data availability via an interrupt. Arduino #$2$ responds to the interrupt by reading the data from the specified lines, displaying it on its console, and activating LEDs.After processing, Arduino #$2$ informs Arduino #$1$ of the completion of the transfer, which is also displayed on its own monitor.Arduino #$1$ acknowledges the completion of the transfer on its monitor as well.

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