I am hoping someone can assist me with an odd ds18b20 issue
I have 3 ds18b20 sensors that I bench tested by manually wiring them all 3 to power then the signal pin of each went to a breadboard that had a 4.7k resistor between them and a pin on my arduino. It worked great, all 3 sensors registered temps at the same time.
After that I wired two of the sensors up on the end of the same cable (sharing power/ground/signal) and connected it and confirmed it worked as expected (two temps shown). When that was done I wired up the final sensor and confirmed it also worked as expected.
Unfortunately what is *not* working is having both cables (all 3 sensors) connected at the same time. Either one works by itself but as soon as I plug the second signal connection in the arduino acts like it cannot see any sensors.
FWIW I am using the onewire example code and an arduino mega connected to pin 53.