I have been it itching to do more on this, mainly because it looks so cool. I was thinking of expanding this both horizontally and vertically. So probably from 64 to 128 channels and then from 16 rows to 32 rows.
But given the timing issues this naturally can not be done with a single ATMEGA. I am curious to understand if it is possible to use the same HC-05 and have its output physically go to 2 separate stand alone arduinos and then use the appropriate values from the output in software.
So basically in the processing sketch send over 128 values and use one arduino to drive the first 64 columns and the second one to drive the next 64 but with a single blue tooth module.
Would certainly appreciate any thoughts.
Thanks
Nitin