Windows 10 / Desktop Support - PREKNOWN Not working

[Chris Keilitz]

I'm just getting started and apologize upfront for my ignorance.  I'm building a Java desktop app on Windows and want to connect to a bluetooth scale. I'm using bluecove-2.11.jar and the Java-SE-1.8 (jdk1.8.0_112) 64-Bit.  I cannot seem to get the retrieveDevices devices call with DiscoveryAgent.PREKNOWN to work.  

The local device works fine, pulls back the device info.

localDevice = LocalDevice.getLocalDevice(); // works fine...pulls back the local device info.

The PREKNOWN call returns null, while the CACHED pulls back a few old devices.

remoteDevices = discoveryAgent.retrieveDevices(DiscoveryAgent.PREKNOWN);

remoteDevices = discoveryAgent.retrieveDevices(DiscoveryAgent.CACHED);

I'm sure I'm missing something fundamental...hoping one of you can help.  

[evans ryanada]

hello what are aspiring to achieve

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[Chris Keilitz]

I'm adding on to an existing...established Java app.  I'd like the ability to read weight values from a lower cost Bluetooth (kitchen style) scale, as well as perform a tare command (zero out the weight).  Right now the application is leveraging a USB/serial interface to an expensive scale/balance.

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[evans ryanada]

Sorry for late response i have been i tired up in rural areas of kenya where internet access is limited.

I tried to figure out how i can help and i thought it would be noble you try bluecove snapshot.2.1.1.jar

Kindly can we chat on WhatsApp +254706384625

On Sun, 30 Dec 2018 04:22 Chris Keilitz, <kei...@gmail.com> wrote:

I'm adding on to an existing...established Java app.  I'd like the ability to read weight values from a lower cost Bluetooth (kitchen style) scale, as well as perform a tare command (zero out the weight).  Right now the application is leveraging a USB/serial interface to an expensive scale/balance.

Morning

On Saturday, December 29,a 2018 at 12:58:31 PM UTC-5, evans ryanada wrote:

hello what are aspiring to achieve

On Sat, 29 Dec 2018 19:05 Chris Keilitz, <kei...@gmail.com> wrote:

I'm just getting started and apologize upfront for my ignorance.  I'm building a Java desktop app on Windows and want to connect to a bluetooth scale. I'm using bluecove-2.11.jar and the Java-SE-1.8 (jdk1.8.0_112) 64-Bit.  I cannot seem to get the retrieveDevices devices call with DiscoveryAgent.PREKNOWN to work.  

The local device works fine, pulls back the device info.

localDevice = LocalDevice.getLocalDevice(); // works fine...pulls back the local device info.

The PREKNOWN call returns null, while the CACHED pulls back a few old devices.

remoteDevices = discoveryAgent.retrieveDevices(DiscoveryAgent.PREKNOWN);

remoteDevices = discoveryAgent.retrieveDevices(DiscoveryAgent.CACHED);

I'm sure I'm missing something fundamental...hoping one of you can help.  

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[Chris Keilitz]

I've been desperately seeking a Bluetooth Java library that works with Windows 10 on a fairly current version of Java e.g., v8+.  I've used the BlueCove library version 2.1.1-SNAPSHOT on winsock, but it's last update was more than 10 years ago and remote discovery doesn't work. It finds the full local device info, but doesn't find anything for remote devices (see dump below).  I new to Bluetooth, so I could be doing something wrong, but I've tried literally dozens of examples available on the web and all respond in the same way.

My question is, do you know of any current, supported Bluetooth Java library that works on Microsoft Windows, for a Java desktop application?  if so, have you tested the Java / desktop app recently in terms of its ability to discover remote devices?

BlueCove version 2.1.1-SNAPSHOT on winsock

OPERATING SYSTEM: Windows 10

JAVA VERSION: 1.8.0_112

JAVA CLASSPATH: C:\Users\Public\workspace\Scale\bin;C:\Users\Public\workspace\Scale\lib\bluecove-2.1.1.jar

LOCAL BLUETOOTH DEVICE:

Address = 3423871D3F38

FriendlyName = DESKTOP-PC

bluetooth.api.version = 1.1.1

bluetooth.master.switch = false

bluetooth.sd.attr.retrievable.max = 256

bluetooth.connected.devices.max = 7

bluetooth.l2cap.receiveMTU.max = 0

bluetooth.sd.trans.max = 7

bluetooth.connected.inquiry.scan = true

bluetooth.connected.page.scan = true

bluetooth.connected.inquiry = true

bluetooth.connected.page = true

Remote device (PREKNOWN) is not retrievable.

Remote device (CACHED):

Device Name:  |  Bluetooth Address: 38B1DBBC8878

BlueCove stack shutdown completed

[evans ryanada]

i will send you Bluetooth spp java desktop working app