Two can be connected to from the same computer at the same time. This would allow you to save variables from one and allow the other one to act on it. Great robot btw.

There isn't an expansion port. I think you are talking about the uart serial port.

just to be sure that you understand, I will tell you how the ez-b works.

The ez-b is connected via WiFi to a computer or an smart phone. The computer is where all of the logic runs. The ez-b is used to control the devices. Up to 5 ez-b's can be connected to the computer. This allows you to control 5 bots, or one Bot with up to 5 ez-b's. You can use a small computer in the Bot to make all of the electronics onboard the robot.

Because of this architecture, there isn't a reason for the ez-b's to be connected to each other.

Saw your bot on a web site.... Nice job dude...

Thank you for the complements. So if I understand this right the computer dose all the processing.

Dose this mean that a computer must be present at all times? As in the robot or EZ-B4 will not run with out a computer present?

You have to be connected to ARC app. It can also run on an iPhone or android, but you have to be connected to this app.

Because these connect via WiFi, the computer just has to be on the same WiFi network.

That's not to bad, if it will run off a phone. I will keep R2's main operation RC as they are now, I thinking a bought using the EZ-b4 for Autonomous functions, which are not used vary often. Currently its handled by 2 Arduino's. When I turn on the Autonomous mode the 2 Arduino's that run the Autonomous functions are powered up and take control of R2. So I could use an old cellphone to do the processing.

This is good to know. I was under the idea that the EZ-B4 had the programing uploaded to it and would run once turned on.

HHmm... Some things here to think a bought. Still looking interesting.

Is there anything else I should be considering?

Thank you for your help.