Do I have to program them one at a time or do I stack them three shields high and add more code?
Oh I use the uno to program my boards.
Do I have to program them one at a time or do I stack them three shields high and add more code?
Oh I use the uno to program my boards.
Stack them up just make sure that they all use different pins so you don't get conflicts.
..and DO NOT CROSS-POST.
Identical post deleted.
sorry, do you mean jumper settings on the three boards? or code? computer settings?
Stack them up just make sure that they all use different pins so you don't get conflicts.
Do I have have to use two sketches in one upload? Or mix the two codes as one sketch.
I mean physical inputs and output pins. In general you cannot have pins working for more than one board. The exception would be where you are using a bus like SPI, I2C or similar.
You cannot have 2 sketches running at once so you need to combine the code into one sketch to do what you want.