For a while I'm looking for an arduino code and a (fritzing) scheme to control a relay in two ways: a physical push on a button (on/off) and a remote trigger (ethernet) to control the same button.
At this moment I'm using Blynk.cc to control some relays of my aquaponic systen (pumps, light, ventilation,...). This works well, but it would be useful to start/stop the relay with a physical button.
Does anyone have a clue if this is possible, can a relay get triggers from two sources (physical and remotely)?
Thank you for helping me out.