Phonegap Healthcare Adapter Design

NexJ Medical Peripheral Mobile Adapter Will be designed to enable NexJ's Mobile Healthcare solutions to interact with Bluetooth peripherals.

Main article: Phonegap Healthcare Adapter

See also: Phonegap Healthcare Adapter Bluetooth Implementation and Phonegap Healthcare Adapter Bluetooth Spec

Class Diagram

Classes

phonegapMedicalDeviceInterface

• Interface to a medical device for use by the NexJ mobile health solution
• Implemented in Javascript

medicalDevice

• Representation of a medical device
• Delegates to a native medical device interface
• Implemented in Javascript

nativeMedicalDeviceInterface

• Private interface to physical medical devices
• Implemented in native code (Objective C on iOS, java on Android)

bluetoothAdapter

• Adapter to allow medical device objects to interact with communication libraries on the device
• In the future a Wifi adapter will also be needed to fulfill the same role of communication over another protocol
• Implemented in native code

bloodPressureBluetoothAdapter

• Adapter to allow medical device objects to interact with specific medical peripherals
• These will be needed for each type of medical peripheral
• Implemented in native code

Native Bluetooth API

• Libraries on the mobile devices SDK that allows programmable interaction with Bluetooth devices

Blood Pressure Device

• Physical medical device peripheral

Flaws

• Should we be concerned about managing the instances of medicalDevice or will the rest of the solution
  • Rest of the application: It becomes more of a Medical device factory
  • This Project: Another layer should be added to represent a device manager
• bloodPressureBluetoothAdapter should know about specific device communication without relying on any specific communication protocol, otherwise it will need be reimplemented per communication adapter(eg. BluetoothAdapter, WifiAdapter)

Mobile Device Libraries

iOS

Wifi

• Unknown at this time

Bluetooth

• CBCentralManager entry point to Bluetooth communication
  • Allows querying of devices
  • Can list connected devices
  • Can connect to devices, creating CBPreripheral Objects
• CBPeripheral's allows reading and writing of CBCharacteristic Objects
  • Can listen for changes to characteristics
  • Writing and reading is event driven programing via callback parameters
• CBCharacteristic's represent a piece of data from a device along with semantic data

Android

Wifi

• WifiP2pManager is the starting point for all peer to peer communication
  • Upon initialization devices connections can be established
  • Peers can be queried

Bluetooth

• Supports many 'paired' devices
• BluetoothAdapter is the starting point for all Bluetooth communication
  • Discover devices
  • Query addresses
  • Get remote BluetoothDevice objects
  • Control BluetoothProfile's
  • Create listening sockets to addresses
• Classes Implementing BluetoothProfile can be queried for BluetoothDevice Objects, implementing classes:
  • BluetoothA2dp
  • BluetoothHeadset
  • BluetoothHealth
• BluetoothDevice objects allow the creation secure and insecure Bluetooth socket's
  • These all data transfer between physical devices
  • Bluetooth protocols are transparent

Comparison

Requirements

• Querying of devices
  • Supported by both platforms on both communication mediums
• The ability to fetch data from devices
  • Supported by both platforms on both communication mediums
  • Assuming connections have been created with medical devices, this requires a known address to be cross referenced with current devices from the query functionality above
• Optional The ability to push data to devices
  • See above

Assumptions

• NexJ's spec dictates that devices can be assumed paired
• Any semantic information required will be provided upon initialization