Hi, I have seen that it is possible to link 2 Arduino boards together and the information says that more can be added. On the schematic it links ground->ground, 4->4 and 5->5 in serial, how can I link Arduino boards 3, 4 etc. is it the same pins? I suspect on the master that I would need to somehow expand the connection ability of the ground, & pins 4 & 5? Is there a simple connector I could use? It would in the end need to be user friendly as each board would act as a plugin.
Appreciate the steer.
Kind regards, jB 8)