Connectivity Beyond The Web

Friedger MüffkeOpenIntents

@fmdroidUXperts.mobi11 June 2012 - Brussels

Overview

● No server in the cloud

1.Wireless with infrastructure2.Cable3.Wireless without infrastructure

RCSe / Joyn● GSM connection + data connection● Enhance phone calls● MWC2012: GSMA announced Joyn● App To App: Vodafone/Jibe Mobile

– Phone number as identifier– https://rcssdk.developer.vodafone.com/android

WiFi● Discovery in the network

WifiManager● Socket communication (HTTP, etc.)● Code: github.com/rorist/android-network-discovery

● Examples– AllJoyn (Qualcomm)– AmbientTalk (VUB)– Anymote Library (Google TV)

USB Client / ADK● Open Android Accessory Protocol● Device is USB client

– Receives power from accessory– Driver burden with accessory

● UsbManager, UsbAccessory ● Communication via file transfer● Many dev boards available (Arduino, ST)

USB Host● Requires drivers

– Soft driver http://android.serverbox.ch/?p=549

● Device provides power● USB OTG● API 12 (3.1)● Communication

via UsbDeviceConnection

Audio Jack● Credit Card Reader● HiJack sensors set● Pressure Pen (Kickstarter)● AudioTrack:streaming generated sound

– github.com Android-Audio-Jack-Communication

● MediaRecorder:recording– code.google.com NoiseAlert

● FFT or FSK for modulation, demodulation

Wireless TechnologiesSetup Time

Range Power Consumption

Data Rate

PMR 446 / PTT(446 MHz)

> 500m 500mW analog /3.6kps

Bluetooth(2.4 GHz)

< 6 s 100m <40mA 2-3Mbps

ANT+ (Garmin)(2.4 GHz)

100m 15mA 1Mbps

Bluetooth 4.0(2.4 GHz)

< 0.006s 100m <15mA 1Mbps

WiFi Direct(2.4 GHz)

250m 100mA 150Mbps

NFC (13,56 MHz)

<0,1s <0.2m <15mA 424kbps

Bluetooth LE● Standard connection BluetoothAdapter ● Examples: heart rate, proximity tag (e.g. tōd)● No API yet available for Android

– Nordic/Broadcom API● http://code.google.com/p/broadcom-ble/● BleClientService

– Motorola: Heart rate API● FindMe, Proximity profiles● Devices: iPhone 4S, Motorola Razr

WiFi Direct● API level 14● WifiP2pManager● Group of devices● Can connect to legacy devices● WiFi Display – still to come

NFC Push● API read, write, push since Android 2.3

– Use case: Settings (NFC Profile App)● NFC Beam since Android 4.0● Filtering through mime-types● NfcAdapter● Use cases: Payment, sharing

Questions

+Friedger Müffke@fmdroid

gplus.to/friedger

OpenIntents