Cross Platform Copter with Titanium

How to control a drone with javascript and titanium

Transcript

1. Cross  Pla)orm  Copter   How  to  control  a  drone  with  5tanium?     Marcus  Ross  /  @zahlenhelfer  
2. Boys  and  their  toys...   •  When  I  was  a  liCle  boy,  I  always  wanted  this:   hCp://www.flickr.com/photos/raijsi/4442087532/  
3. ...when  they  grow  up   •  Now,  I´m  a  man  –  but  a  boy,  too.   •  so  I  want  this  today:  
4. ...but  as  a  Titan  do  more   •  perfect  solu5on:   Titanium  +  AR.Drone  =  BIG  FUN   •  Kickstarter  was:   Blackberry  JAM  Asia  2012  Contest   •  I  tried  the  Alpha  Version   of  the  BB  SDK   •  ask  Ketan  for  more     serious  apps  with  this  
5. details  of  the  drone   •  AR.Drone  2.0  is  from  Parrot   •  4  x  35,000  rpm  motors   •  ARM  Cortex  A8  1Ghz   •  1  GB  RAM   •  Wifi  with  b/g/n   •  BusyBox  Linux  2.6.32   •  Magnometer  /  Gyro   •  2x  camera  (720p  HD  &  QVGA)   hCp://www.flickr.com/photos/crea5ve_stock/  
6. This  is  BB10  Copter   •  Titanium  based  app   •  basic  flight   •  can  do  a  stunt   •  has  LED  control   artwork  by  Liz  Meyers  -­‐>  
7. Challanges   •  understand  the  SDK   •  understand  UDP   •  do  real5me  stuff   •  make  it  easy  via  JS   hCp://www.flickr.com/photos/irrezolut/  
8. •  use the SDK docs •  understand the protocol •  understand the cmds •  use easy javascript with Titanium power tools  for  the  job   8   hCp://www.flickr.com/photos/skistz/398429879/  
9. dev  requirements   •  get  SDK  Docs   (hCps://projects.ardrone.org/)   •  get  Appcelerator  Titanium   (hCp://www.appcelerator.com/)   •  get  the  UDP  plugin   (hCps://github.com/appcelerator/ 5tanium_modules.git)   •  clone  the  starter  project   (hCps://github.com/zahlenhelfer/ CrossPla)ormCopter.git)   •  have  FUN!  
10. How  to  talk  to  a  drone   •  think  in  real5me!   •  be  polite   •  repeat  yourself  osen   •  don´t  forget  the  kill  switch  (demo)  
11. Let´s  start  building  it   •  Read  the  docs   •  and  understand  it,  too  J  
12. Drone  101  –  Part  1   •  use  AT  Commands  (like  to  old  5mes)   •  calc  bit-­‐arrays  to  integers  (arrrghhh!)   •  use  a  counter  (to  be  repe55ve)   Example:   AT*REF=<seq>,<command><CR> in  more  detail-­‐>  next  page  
13. Drone  101  -­‐  Part  2  
14. basic  drone  commands     •  start  the  drone   AT*REF=1,290718208<CR> •  land  the  drone   AT*REF=2,290717696<CR>
15. How  to  calc  commands   •  a  string  value   (ex:  the  arguments  of  AT*CONFIG,  or  AT*REF)   •  a  signed  integer  -­‐  the  sequence  number   •  a  single-­‐precision  IEEE-­‐754  floa5ng-­‐point  value   (aka.  float).  Instead,  the  32-­‐bit  word  containing   the  float  will  be  considered  as  a  32-­‐bit  signed   integer  and  printed  in  the  AT  command  (an   example  is  given  below)   AT*REF=1,290718208<CR>  
16. basic  drone  commands   •  move  les   AT*PCMD=3,1,-1090519040,0,0,0<CR>   •  move  right   AT*PCMD=4,1,1056964608,0,0,0<CR>
17. control  the  flight   •  use  AT  Commands   •  calc  float  to  32Bit  WORD  to  integers   •  Example:  -­‐0.8  degree  pitch   -­‐0.8f  equal  BF4CCCCD  equal  −1085485875   •  Result:   AT*PCMD=2,0,−1085485875,0,0,0,0    
18. bytebuffer.js   •  hCps://github.com/5mkurvers/byte-­‐buffer     Example: <script src="bytebuffer.js"></script> <script> b = new ByteBuffer(2, ByteBuffer.BIG_ENDIAN, true) alert(b.length); var floatValue = -0.8; b.writeFloat(floatValue); b.seek(-4); alert('int:'+b.readInt()); </script>
19. UDP  &  AR.Drone   19   1)  est.  wifi  with  the  drone   (192.168.1.1)   ⌘   AR.Drone   2)  send  CMD  through  UDP          (Port  5556)  
20. UDP  in  a  nutshell   •  UDP  =  User  Datagram  Protocol   •  RFC  768   •  based  on  the  transport  layer  of  ISO/OSI   •  it´s  very  fast  but,   •  it´s  very  unreliable   •  some  kind  of  a  sister  protocol  to  TCP   more  info:   hCp://en.wikipedia.org/wiki/User_Datagram_Protocol  
21. Add  UDP  Module  Support   •  Add  the  following  to  5app.xml   <modules> <module platform="iphone" version="1.1">ti.udp</module> <module platform="android" version="2.1">ti.udp</module> </modules>
22. Create  UDP  Socket   var UDP = require('ti.udp'); var socket = UDP.createSocket(); socket.sendString({ host: 192.168.178.1, port: 4242, data: “some cool command” });
23. Building  block  with  javascript   •  update  the  sequence  number   seq=seq+1; •  send  a  command  more  then  once   setIntervall(doCurrentCmd,30)  
24. demo time 24 Welcome  Captain…   the  drone  is  ready  to  start   fasten  your  seatbelts   take  off!  
25. and  now?   •  Have  fun  an  experiment  with  that!   •  start  your  5tanium  envoirment   •  try  the  CPCopter  Code   •  look  insight  flightbook.js  
26. future  plans   •  get  into  the  WP8  beta  –  Jeff,  please!   •  Save  the  flight-­‐data  in  ACS   (Ketan  looking  forward  to  your  session!)   •  make  the  camera-­‐stream  work   (Extend  Titanium.Media.VideoPlayer  for  PVE)   •  built  a  TitanCopter  community   •  Keep  it  free  –  so  all  can  have  fun!  
27. Thank  you!   •  Thank  you  Boydlee  for  making  5Conf!   •  Thank  you  audience!   •  Thank  you  Appclereator  for  this  cool  tool!   •  for  further  ques5ons:   – eMail:  marcus.ross@zahlenhelfer.de   – twiCer:  @zahlenhelfer   – ReaLife:  meet  me  outside  for  a  drink