title: BLE peripheral: scanning while connected
body: <p>Is it possible to make a peripheral scan for advertisments while connected to a central? It seems like it is either scanning for advertisments  <strong>or</strong> have your peripheral connected but I need to do both. The peripheral should be able to report RSSI measurements from advertisements it picks up.</p>
  
  <p>I'm using 'bleno' for the peripheral and 'noble' for the scanning on a linux box (bluez)</p>