# How to add minimum 3 serial ports to a Raspberry Pi?

How to add at minimum 3 serial ports to a Raspberry Pi?

1) On hardware

2) On USB

For the the second one i thought about some circuit that exposes 3 serial ports and has an USB port that connects to the Pi. I.e.

                 |===COM1
USB=======circuit|===COM2
|===COM3


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A USB hub with 3 FTDI devices attached to it would work. – pjc50 Dec 5 '12 at 12:39
@pjc50 but is there a chip that can do like a hub to do a micro HUB – user1594895 Dec 5 '12 at 13:07
Acutally I think this is the device you want: ftdichip.com/Products/ICs/FT4232H.htm – pjc50 Dec 5 '12 at 13:45
@pjc50 Yes it is! now i look for prototyping version THANKS +1 – user1594895 Dec 5 '12 at 14:51
You see, this is exactly the reason I sneer at the Open Hardware community's efforts with Raspberry Pi. I think that the Arduino itself is an overkill for most projects, as far as computational power goes (how much MIPS do you need to light an LED?). And here is a prime example. The Raspberry Pi is packed with tons of stuff most people won't be able to use, and you still want to complement its functionality with external circuitry. You paid plenty for the Pi, I'm sure what you want to accomplish can be done by software alone. If you're unable to write that code, downgrade to cheaper kits. – Jonny B Good Dec 5 '12 at 16:08