Integration of bluglu device

Our task

To integrate bluglu device into the Mobile Medical Device Integration project to enable the project's functionality of connecting blood glucose devices.

The current task is to implement the connectivity between bluglu and Android devices.

Adding multiple manufacturer support

Rebuild our Mobile Medical Device Integration project to support multiple Bluetooth servers and Bluetooth clients.
- Before we started the current task, our project support only a Bluetooth server instance which is used to receive measurements from A&D blood pressure meter and weight scale.
- So at beginning, we tried to update our project to support multiple Bluetooth servers because we asserted that the bluglu device work the same way as A&D devices. The bluglu device communication protocol specification (UDCP) does mention what work mode it takes.
- Based on the further info from UHN, we knew that bluglu device work as slave, which means blugle device works as Bluetooth server. Therefore, we started to add Bluetooth client support for our project in order to be able to communicate with bluglu devices.
- The last stage of this part of work is to reconstruct the MMDI project to refine the program structure due to both Bluetooth server and client sharing several general parts.

Probing Bluetooth communication between bluglu and Android devices

We've know the paring process (see the documentation below) based on the info from UHN.

Bluglu device

bluglu device is a Medical Device Data Interface Adapter, which can attach to the OneTouch® UltraMini® Blood Glucose Meters and converts the UART serialized data into Bluetooth. Bluglu device is a in-house product of Toronto University Health Network. Bluglu is built around an 8-bit microcontroller and includes a Bluetooth module, an Apple specific co-processor, LED status inducators, a micro-USB connector (for battery charging), and various passive components combined on a dual-layer printed circuit board.

Features

Dimensions: 58cm x 35cm x 12cm
Radio: Bluetooth 2.0, Class 2
Battery: Build-in rechargeable lithium-ion, charge using mini-USB
Firmware: Update over Bluetooth and USB
Supported Devices: Blood Glucose Meters: LifeScan OneTouch Ultra, Ultra2, UltraMini

Paring Process

Tap the reset button once to put the BluGlu into a known state (idle). Hold the reset button until the white LED turns on, it should take about 4-5 seconds.
Release the reset button and the BluGlu is now in a "waiting for pairing" state for about 2 minutes. If pairing times out, BluGlu will remain paired with the last device it was successfully paired with.
Do a Bluetooth device discovery on the mobile phone. Once BluGlu is discovered, you can attempt to pair with it. BluGlu will try to use Simple Secure Pairing, but not all devices support that. If they don't, it will try to revert to using a PIN code.
If this happens, the PIN code is 589213

UDCP Documentation

UHN Device Communication Protocol Specification (UDCP):
Command Explanation:
- Device commands can be issued from the host to request data such as the the battery level. Device commands do not get passed to the sensor that is attached to the bluglu (glucose meter).

- Raw commands are sent from the host to bluglu. Bluglu will then strip out the actual raw packet and pass that to the sensor that is attached.

   1. HTC A7275 (Android version 2.3.3).

   2. MOTOROLA XT885 (Android version 4.04).

   3. MOTOROLA MB860 (Android version 2.2.1).