user6930: I'm currently working on a Arduino Mega (GPS + IMU + SD card logging + BT). I need the Mega for extra memory and serial port. 
I would like to transition to something with a smaller form factor now. I need help with suggestions for a smaller form factor board/version of Mega.
Any suggestions?
I can't really find anything.
The only small size yet meeting requirements (in terms of memory) option seems to be a Microduino - 
but I'm not whether all the libraries (SDfat etc.) will work on this.

user368: The ATmega1284P provides 128kB of flash, 16kB of SRAM, 4kB of EEPROM, and 2 USARTs in a 40/44/49-pin package. Mighty 1284P provides Arduino support for the '1284P.
There aren't too many actual boards that feature it, but it can be used very easily on a breadboard or custom PCB with a programmer.

6930: <p>I'm currently working on a Arduino Mega (GPS + IMU + SD card logging + BT). I need the Mega for extra memory and serial port. 
I would like to transition to something with a smaller form factor now. I need help with suggestions for a smaller form factor board/version of Mega.</p>

<p>Any suggestions?
I can't really find anything.</p>

<p>The only small size yet meeting requirements (in terms of memory) option seems to be a <a href="https://www.microduino.cc/module/view?id=53d7037cb6c69d00003ede53" rel="nofollow">Microduino</a> - 
but I'm not whether all the libraries (SDfat etc.) will work on this.</p>
 368: <p>The ATmega1284P provides 128kB of flash, 16kB of SRAM, 4kB of EEPROM, and 2 USARTs in a 40/44/49-pin package. <a href="https://github.com/maniacbug/mighty-1284p" rel="nofollow noreferrer">Mighty 1284P</a> provides Arduino support for the '1284P.</p>

<p>There aren't too many actual boards that feature it, but it <a href="https://maniacbug.wordpress.com/2011/11/27/arduino-on-atmega1284p-4/" rel="nofollow noreferrer">can be used very easily</a> on a breadboard or custom PCB with a <a href="https://arduino.stackexchange.com/questions/3906/how-do-i-write-an-arduino-program-to-an-avr-chip-without-the-arduino-bootloader">programmer</a>.</p>
