code: public void start() {
          Thread thread = new Thread(new LogCatCommandExecutor());
          thread.setName(getClass().getSimpleName() + " logcat for " + device.getSerialNumber());
          thread.start();
  
          try {
              sleep(500); // ignore old output that logcat feeds us
          } catch (InterruptedException e) {
          }
  
          logListenerCommandShell.activate();
      }
docs: Start receiving and acting on paparazzo requests from the device.