title: Only one tello drone flies when running tello swarm
body: <p>I try to run tello swarm and I am inspired by <a href="https://medium.com/@henrymound/adventures-with-dji-ryze-tello-controlling-a-tello-swarm-1bce7d4e045d" rel="nofollow noreferrer">this article</a>. However, only one tello drone can fly. </p>
  
  <p>I have done some experiments to make sure each network interface
  (in my cases, one notebook wifi adapter and two usb wifi dongles)
  can successfully interact with any tello (I have three in total)
  if python code is modified to only try to connect one tello.
  Unfortunately, when I try to interact two tellos at the same time
  (as you did in this tutorial), only one tello fly each time. The codes is as follows. The operating system is Ubuntu 18.04.</p>
  
  <pre><code>import socket
  import time
  
  drone1 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  drone1.setsockopt(socket.SOL_SOCKET, 2, 'wlp2s0'.encode())
  
  drone2 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  drone2.setsockopt(socket.SOL_SOCKET, 2, 'wlxf8788c004f0'.encode())
  
  drone1.sendto('command'.encode(), 0, ('192.168.10.1', 8889))
  drone2.sendto('command'.encode(), 0, ('192.168.10.1', 8889))
  
  drone1.sendto('takeoff'.encode(), 0, ('192.168.10.1', 8889))
  drone2.sendto('takeoff'.encode(), 0, ('192.168.10.1', 8889))
  
  time.sleep(5)
  
  drone1.sendto('command'.encode(), 0, ('192.168.10.1', 8889))
  drone2.sendto('command'.encode(), 0, ('192.168.10.1', 8889))
  
  drone1.sendto('land'.encode(), 0, ('192.168.10.1', 8889))
  drone2.sendto('land'.encode(), 0, ('192.168.10.1', 8889))
  </code></pre>
  
  <p>I would appreciate it very much if anyone could give me some suggestions.</p>