Please give some advise, which arduino is better for me.

Projects General Guidance
1

I am using arduino UNO and WIFI shield now, it works well.
But I want to add more functions and update the Arduino hardware.
Could you give me some advises. which Arduino is suitable for me. I need the ram larger than 8K. and can be used with wifi shield directly. It will be great if the dimension is same with UNO. Thanks a lot.

2

Hvis du tenker bygge mange prosjekter: velg pro mini til 25kr/stk.
Velg heller break-out isteden for shields. (de er oftest billigere)
Der er flere kloner som har ekstra tilkoplinger for 5V/3.3V og Jord (se/søk ebay)
ett eksempel her: http://www.ebay.com/itm/2013-Version-ATmega16U2-ATmega328P-UNO-R3-Board-Free-USB-Cable-for-Arduino-DIY-/141247074994?pt=LH_DefaultDomain_0&hash=item20e2fb52b2
og http://www.ebay.com/itm/Updated-Version-SainSmart-UNO-R3-MEGA328P-AU-ATMEGA16U2-USB-Cable-For-Arduino-/380877702426?pt=Wissenschaftliche_Geräte&hash=item58ae14851a

3

I think you can use Arduino MEGA 2560 with some memory expansion such as quadram from rugged circuits. Unfortunately they seem to be moving their websites so I can't find the usual link to the product. MEGA 2560 has 8KB ram

4

Maybe you could redesign your program to work within the 8k limit?

...R

5

'1284P, 16K SRAM, twice that of a Mega2560.
I have kits & assembled boards available.
Sometimes you need more SRAM but not all the IO & expense of a larger chip/board.
For example I needed an array of 45 shift registers * 325 entries to be shifted out superfast - 14,625 bytes - that can be changed by the user between transfers. '1284P the best way to get there.
This board is buildable with onboard FTDI module, or offboard using FTDI Basic or equivalent, for serial downloading. Setup the mighty1284 cores with the IDE and away you go with more SRAM, 32 IO, dual hardware serial.
http://www.crossroadsfencing.com/BobuinoRev17/

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6

MEGA 2560 sounds great. Does it support WIFI shield and can I use the old code directly?
Thanks a lot

liudr:
I think you can use Arduino MEGA 2560 with some memory expansion such as quadram from rugged circuits. Unfortunately they seem to be moving their websites so I can't find the usual link to the product. MEGA 2560 has 8KB ram

7

Arnold_Sweden:
MEGA 2560 sounds great. Does it support WIFI shield and can I use the old code directly?
Thanks a lot

Yes it does support wifi shield and if you mean using UNO's code directly, almost. Only few things may be in the way, such as where the I2C bus is, if you use real time clocks or other I2C devices. Nothing major. Also, there should be no issue using the wifh shield and old code on bobuino either.

CrossRoads,

Is there a help page on how to add the bobuino to the list of boards in Arduino IDE? That would be helpful.

8

The mighty1284 page has a readme or similar.

I have a link to that, and an updated pins_arduino.h on my webpage
http://www.crossroadsfencing.com/BobuinoRev17/pins_arduino.h

Guess I could move those up on my webpage, or copy them near each 1284 board.