in controller.h:

Code:
private slots:
...
void new_ecm_info();
...
in controller.cpp:
Code:
void controller::new_ecm_info() {
  // do your thing here, this function will be called when info gets loaded
}
in launcher.cpp, void launcher::on_interface_loaded():

Code:
  //---- SIGNALS FROM MODE4 CONTROLLER
  connect(mode4controller,SIGNAL(send_new_note(QString)),notes,SLOT(add_new_note(QString)));
  connect(acqthread,SIGNAL(updated_ecm_info()),mode4controller,SLOT(new_ecm_info()));