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Controlling drones with
JavaScript
by Jasper Schulte
About me
 From Amsterdam
 By day: CTO
 jasperschulte.nl
 By night: Drone enthusiast
Goal of this talk
 Showing you how to control multiple drones using JavaScript
 Step 1: Choosing the right drone
 Step 2: Controlling a single drone
 Step 3: Controlling multiple drones at once
 Questions: see me after the talk
You’re here at your own risk
 But rest assured: these drones are not very powerful
 Use a flat hand (like feeding a horse)
 Just don’t point (your) fingers
drones
Step 1:
Choosing the right drone
Evolution of drones
Requirements
 Cheap!
 Can fly indoors
 Not (too) dangerous
 Have an interface for communication
The RyzeTech Tello
 (Relatively) cheap: about $100
 Light: 95 grams (incl. cage & battery)
 UDP interface
 No gps
 Downwards facing camera
Downwards facing camera
 Visual recognition of patterns on the ground
 Keep the drone in place
 Track distance moved
 Hence the bedcovers!
Step 2:
Controlling a single drone
Sending commands & receiving telemetry
 Communication using UDP
 “Best effort”: no immediate feedback
 For now: Wait for a certain amount of time before sending next command
Do it
Step 3:
Controlling multiple drones at once
What do we need for coordinated flight?
 We need to know where the drones are relative to each other
 We need to know where they are in a certain space
Introducing Mission Pads
 Sold by same company
 Mission Pads are recognized by downward
facing camera
 Every Mission Pad is unique
 Drone calculates its relative position
compared to the Mission Pad
Mission Pad grid
 Mission Pads are placed in grid with known
positions
 By combining relative position to Mission Pad with
known position of Mission Pad we know the
position of the drone
Getting the relative position
 Now we have
 ID (2) of the current Mission Pad below the drone
 Relative x (73) & y (18)
Calculate position
Generate the move command
Coordinated flight
How do they ‘dance’?
0, 0 160, 0
0, 80 160, 80
0, 160 160, 160
0, 240 160, 240
0, 320 160, 320
1
2
3
4
In conclusion
Lessons leared
 Controlling drones is hard
 Quality of sensor input
 External factors
 Get rid of
 Your cats
 Your plants
 Be prepared to crash (a lot!)
 You need to create your own command
feedback system
 Software on drone is not open source
=> limited control
Thank you!

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drones

  • 2. About me  From Amsterdam  By day: CTO  jasperschulte.nl  By night: Drone enthusiast
  • 3. Goal of this talk  Showing you how to control multiple drones using JavaScript  Step 1: Choosing the right drone  Step 2: Controlling a single drone  Step 3: Controlling multiple drones at once  Questions: see me after the talk
  • 4. You’re here at your own risk  But rest assured: these drones are not very powerful  Use a flat hand (like feeding a horse)  Just don’t point (your) fingers
  • 6. Step 1: Choosing the right drone
  • 8. Requirements  Cheap!  Can fly indoors  Not (too) dangerous  Have an interface for communication
  • 9. The RyzeTech Tello  (Relatively) cheap: about $100  Light: 95 grams (incl. cage & battery)  UDP interface  No gps  Downwards facing camera
  • 10. Downwards facing camera  Visual recognition of patterns on the ground  Keep the drone in place  Track distance moved  Hence the bedcovers!
  • 11. Step 2: Controlling a single drone
  • 12. Sending commands & receiving telemetry  Communication using UDP  “Best effort”: no immediate feedback  For now: Wait for a certain amount of time before sending next command
  • 13. Do it
  • 15. What do we need for coordinated flight?  We need to know where the drones are relative to each other  We need to know where they are in a certain space
  • 16. Introducing Mission Pads  Sold by same company  Mission Pads are recognized by downward facing camera  Every Mission Pad is unique  Drone calculates its relative position compared to the Mission Pad
  • 17. Mission Pad grid  Mission Pads are placed in grid with known positions  By combining relative position to Mission Pad with known position of Mission Pad we know the position of the drone
  • 18. Getting the relative position  Now we have  ID (2) of the current Mission Pad below the drone  Relative x (73) & y (18)
  • 20. Generate the move command
  • 22. How do they ‘dance’? 0, 0 160, 0 0, 80 160, 80 0, 160 160, 160 0, 240 160, 240 0, 320 160, 320 1 2 3 4
  • 24. Lessons leared  Controlling drones is hard  Quality of sensor input  External factors  Get rid of  Your cats  Your plants  Be prepared to crash (a lot!)  You need to create your own command feedback system  Software on drone is not open source => limited control

Editor's Notes

  1. 24:36 Hi, my name is Jasper, and today we will be flying some drones! Thank the organizers for… Thanks for the great talks until now Hitchickers presentation We had a guitar And thank YOU for putting yourself in harms way to see me fly my drones on stage And last but not least thanks to the US Custom agents for letting me bring my drones into the US “Why are you bringing drones into DC” “What do you have against Trump?”
  2. 23:20 First time in WashingtonDC
  3. 22:37
  4. 21:43 Pick up the drone
  5. 21:23
  6. 21:17
  7. 18:49
  8. 18:08
  9. 17:21 Downwards facing camera: next slide!
  10. 15:51 Show the camera
  11. 15:46
  12. 14:43
  13. 09:07
  14. 09:00
  15. 08:26 Table cloth is our ‘certain space’ I’ve projected a grid in this space
  16. 07:18 Show an actual Mission Pad
  17. 06:39
  18. 06:04
  19. 05:31
  20. 04:40
  21. 01:54
  22. 00:44
  23. 00:39
  24. 0:00 "I’m potty training my daughter right now and that is a more reliable proces"
  25. 0:00