Is Arduino Mega ADK the board which I need??

Projects General Guidance
1

Hello, I need help with my project.
I need communicate one arduino board (which I can program) with other one that is already programed and I can't access to this one.
At the moment I have programed a PC to comunicate to the board that I can't access, I am using serial communication ( by USB).
I would like to know If I can use an Arduino Mega ADK to emulate the PC.
For example, send information to this Arduino mega ADK from the PC and this Arduino MEGA ADK sends this information to other Arduino mega ( the other board which I can't access) by the USB HOST included in MEGA ADK like if this one was a PC, like a bridge.

Excuse me for my English

2

You could use a Mega ADK, or you could use any other board. Let's say that the arduino that emulates a PC is an Uno. You just hook up Uno pin 1 to Unknown pin 0, and Uno pin 0 to Unknown pin 1. Then, just use normal Serial with the Uno. NOTE: This will interfere with Serial from the Uno to the PC. Use a Leonardo to prevent this.

3

lights0123:
You could use a Mega ADK, or you could use any other board. Let's say that the arduino that emulates a PC is an Uno. You just hook up Uno pin 1 to Unknown pin 0, and Uno pin 0 to Unknown pin 1. Then, just use normal Serial with the Uno. NOTE: This will interfere with Serial from the Uno to the PC. Use a Leonardo to prevent this.

The problem is that I can't access to the pines from Arduino mega into the machine, I only have access to its USB connector.
For that I need a board which I can connect this to pc and the other arduino by USB, send information from pc to a board and this one send the same information to the Arduino ( in de machine) by USB, at the same time.

4

Ah, yes. Then, you'd either need the Mega ADK, or, for a cheaper option, arduino Uno (or anything, really) with a Yun shield.

5

I need the next configuration:

PC --------------USB cable-----------------MegaA---------------USB cable----------------MegaB
(serial communication) | | (serial communication)
| |
| |
| |
| |
Motor 1--- ---Motor 2

I have now solved the blue part.

And the black part, I have done PC------------------USB cable------------------MegaB
(serial communication)
But I need do that like the first schematic.

I don't have access to the MegaB because this is inside a machine, I can't access to its pines, I need connect to it by USB Cable.

Is possible do that with ARDUINO MEGA ADK in the MEGA A position?

6

Nobody have this board and can try do some serial communication like that?
I need know if it is possible, is very important for my project.