Hello everyone, I am new to arduino .
Here is my challenge: i have12 rooms which has individual sub meter . I want to track how many units of water each room is consuming . So i want to put electric switch(220 v or 5v dc) in each room (12 room) so that anyone can press the button and get water. (INPUT) ardiuno should give me output for the respective relay (12 relays) so that whenever a switch is pressed , one relay out of 12 should be energised.
Challenge 1 : . If two user press the switch from there room at same time , then it should only process the first person who has pressed the switch
Challenge 2 : only one relay should be energised at single time . If room one has pressed the switch then it should not take command from any other room unless room 1 turn off the switch .
INPUT : 1-12 rooms (220v or 5 v dc) OUTPUT : 1-12 5v relay( only one relay should be energised at one single tme)