I have been working on an open source scuba diving computer project (www.diydivecomputer.com) for some time and I have been looking for the perfect platform to create it on. It seems that there is a large hole in the market when it comes to micro controllers. There are the low capability Arduino and compatibles, then there are the system on a chip boards like the Raspberry Pi with very little in-between.
For my dive computer project I want to make the device wrist mountable (small form factor), have a largeish display (larger RAM buffer and powerful processor), have some custom bitmapped (lots of flash space) or vectored (powerful processor) fonts and the ability to connect sensors (more i/o pins), runs on batteries (low power), and can talk to the outside world to transfer dive logs (preferably bluetooth). The Spark Core comes closest to what I have been looking for but still misses the mark on all of these criteria expect perhaps processing power, size and low power.
I’ve seen from other postings that there are a lot of people out there that feel the same way, that there is a hole in the market for a product that has a bit more RAM, more flash space, a few more I/O pins and maybe a bluetooth option rather than wifi.
Just wanted to point this out incase Spark or anyone else wants to do something about it.