how can I connect two arduinos using the rx/tx? is ther a schematic? sketch? don't where to start or how hook anything together? to build something like this?
The first problem in this lab is to get two Freeduinos to communicate with each other that are at least 2 feet apart. Freeduino 1 will have a set of switches to enter the correct bit pattern as well as LED’s to indicate the bit pattern that is applied to the Freeduino. Freeduino 2 will have LED’s that show the bit pattern output. Don’t forget to limit the output current to the LED’s. RS-232 protocol could help. The media over which they will communicate is up to 2 wires. Ground and a TX/RX data line. Special dispensation can be obtained by the lab dictator if another wire is needed. Explain why it is needed. You will need to partner with another person in lab because 2 Freeduinos will be required to communicate back and forth. We should be able to see the data transfer on the O’scope. The data inputs on Freeduino 1 must be replicated by Freeduino 2. If the bit pattern on the transmitting Freeduino is on, off, off, on, then the second Freeduino must replicate that pattern.
In section two of this lab the inputs and outputs will now become I/O that is controlled by the RX/TX pin. You may now use 3 wires, Ground, TX data, RX Data. Another wire can be approved if necessary. You are to make the Freeduinos able to talk back and forth. Either should be able to transmit its data to the other. The RX/TX pin is the key to making one Freeduino the TX and the other Freeduino the RX. Both Freeduinos should have switches and LEDs for input or output.