tello: Fix partially #793 by initialize doneCh in NewDriverWithIP (#931)

platforms/dji/tello/driver.go

@@ -202,30 +202,7 @@ type Driver struct {
 // NewDriver creates a driver for the Tello drone. Pass in the UDP port to use for the responses
 // from the drone.
 func NewDriver(port string) *Driver {
- d := &Driver{name: gobot.DefaultName("Tello"),
- reqAddr: "192.168.10.1:8889",
- respPort: port,
- videoPort: "11111",
- Eventer: gobot.NewEventer(),
- doneCh: make(chan struct{}, 1),
- }
-
- d.AddEvent(ConnectedEvent)
- d.AddEvent(FlightDataEvent)
- d.AddEvent(TakeoffEvent)
- d.AddEvent(LandingEvent)
- d.AddEvent(PalmLandingEvent)
- d.AddEvent(BounceEvent)
- d.AddEvent(FlipEvent)
- d.AddEvent(TimeEvent)
- d.AddEvent(LogEvent)
- d.AddEvent(WifiDataEvent)
- d.AddEvent(LightStrengthEvent)
- d.AddEvent(SetExposureEvent)
- d.AddEvent(VideoFrameEvent)
- d.AddEvent(SetVideoEncoderRateEvent)
-
- return d
+ return NewDriverWithIP("192.168.10.1", port)
 }
 
 // NewDriverWithIP creates a driver for the Tello EDU drone. Pass in the ip address and UDP port to use for the responses
@@ -236,6 +213,7 @@ func NewDriverWithIP(ip string, port string) *Driver {
  respPort: port,
  videoPort: "11111",
  Eventer: gobot.NewEventer(),
+ doneCh: make(chan struct{}, 1),
  }
 
  d.AddEvent(ConnectedEvent)