For the communication of the LEDwork we needed a robust solution. Serial seemed a good way but unfortunately the arduino (both the duemilanove and the pro mini) only has one hardware serial. So we started looking for a solution to overcome this tiny inconvenience. First we looked into a software serial but this didn’t work out, it was a bit too much for the arduino’s little processor to handle up to four software serials (actually it could work with better research but it takes 8 pins which we really need for other stuff). So how about multiplexing? (more…)