Read sensor information from Smartphones
I recently found a nodejs library for reading sensor information from smartphones. It is called sensitive and is developed by Alan Reid. Hey Alan, if you are reading this I want to thank you very much for your work you have done :)
Step by step to use sensitive for your project
- install qrencode ( On Mac: sudo port install qrencode On Raspi sudo apt-get install qrencode
- add sensitive to your nodejs project
- if you are already using express for your project its fine. Otherwise add connect/express to your dependencies
- make a folder public/tmp
- add application.js to public/js
- add sensitive folder to public/sensitive
Challenges
Multiple sockets
I already had a socket connection in my application. The sensitive page gave me following error:
On client side:
WebSocket connection to 'ws://localhost:8081/socket.io/1/websocket/1241201754246442188' failed: WebSocket is closed before the connection is established.On server side:
debug: set close timeout for client 421488892666513105
info: socket error Error: write after end
at writeAfterEnd (_stream_writable.js:130:12)
at Socket.Writable.write (_stream_writable.js:178:5)
at Socket.write (net.js:613:40)
at WebSocket.onSocketConnect (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/transports/websocket/hybi-16.js:132:17)
at WebSocket.Transport.handleRequest (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/transport.js:71:10)
at WebSocket.Transport (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/transport.js:31:8)
at new WebSocket (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/transports/websocket/hybi-16.js:59:13)
at new WebSocket (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/transports/websocket.js:31:17)
at Manager.handleClient (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/manager.js:635:19)
at Manager.handleUpgrade (/Users/crunsh/Documents/node_workspace/angular-socket-io-im-master/node_modules/socket.io/lib/manager.js:595:8)