Help with "until" loop

Projects Programming
28

OK we managed but still cannot test.

This places the check on ATOsolenoid into the switch/case logic:

// start or continue hourly 20 second flushing
    switch (state) {
    case Idle :  // start flsushing
      if (digitalRead(ATOsolenoid) == HIGH) {
        state = Flush;
        msec0 = msec;
        digitalWrite(FlushSolenoid, HIGH);  //Switch Solenoid ON  
      }
      break;

    case Flush :  // flush for 20 seconds 
      if (msec - msec0 >= MsecFlush)    {
        msec0 = msec;
        state = Waiting;
        digitalWrite(FlushSolenoid, LOW);  //Switch Solenoid ON
      }
      break;
        
    case Waiting :  // wait an hour, or reset the flushing machine if ATOsolenoid says
      if (msec - msec0 >= MsecIdle)  {
        msec0 = msec;
        state = Flush;
        digitalWrite(FlushSolenoid, LOW);   //Switch Solenoid OFF (time to)
      }
      else if (digitalRead(ATOsolenoid) == LOW) {
        state = Idle;
        digitalWrite(FlushSolenoid, LOW);   //Switch Solenoid OFF (ATOsolenoid dropped)
      }  
      break;
    }
  }

We added a state, just add it to the enum that holds the other states. So it is Idle, Flushing or Waiting out an hour for the next flush.

enum {Idle, Flush, Waiting};
int  state = Idle;

Which now I see that second machine is like @noiasca's, except it uses the solenoid state rather than the sensors for deciding to, or not to, flush and wait repeatedly.

a7