 
 void dropConnector() {
   // send out message that we're going to drop a connector
-  char c = 254;
+  char c = DROPPING_CONNECTOR;
   for (int i=0; i<3; i++) bus[i]->write(c);
   
   // pick random connector to drop

int alertTimer;

void sendEnergy() {
  char c = 0;
  for (int i=0; i<3; i++) bus[i]->write(c);
  addTimer(100, sendEnergy);
}

  for (int i=0;i<3;i++) if(bus[i]->available()) {
    char c = bus[i]->read();
    switch(c) {
      case ALERT: // button is pressed
        if (!isSource && !alertState) {
          // set alert state and set random timer
          alertState = true;
