3. You will be writing an Arduino sketch that implements a push communication protocol, with software strobing. Your bus will send 4-bit values. Your program should read in a number between 0 and 7, and send the string out to a receiver implemented on you breadboard. The connection to the breadboard will be using a GND pin, and two other free pins for RX and TX (not Pins 0 and 1). The transmission speed should be 1 baud. On the breadboard, wire up an LED to the TX line, and a switch to the RX line, See the discussion below for further details on the protocol. Turn in a listing and demo your circuit. 3. You will be writing an Arduino sketch that implements a push communication protocol, with software strobing. Your bus will send 4-bit values. Your program should read in a number between 0 and 7, and send the string out to a receiver implemented on you breadboard. The connection to the breadboard will be using a GND pin, and two other free pins for RX and TX (not Pins 0 and 1). The transmission speed should be 1 baud. On the breadboard, wire up an LED to the TX line, and a switch to the RX line, See the discussion below for further details on the protocol. Turn in a listing and demo your circuit