Bluetooth low energy issues

Has anyone been having issues with the low energy Bluetooth functionality in iOS 6. My Bluetooth heartrate monitor quit working when I upgraded?

Same issue for me this morning as well, and in addition to Bluetooth audio. Seems Apple went and broke backwards compatibility when implementing the Bluetooth stack for iOS 6.

Similar Messages

The Bluetooth low energy protocol is not backward compatible with classic Bluetooth protocol. My iPhone 4s can not find my sonny in-dash player. However my iPhone 3GS does it. Very disappointed with this. Any idea how it can be fixed???

The Bluetooth low energy protocol is not backward compatible with classic Bluetooth protocol.
My iPhone 4s can not find my sonny in-dash player. However my iPhone 3GS does it. Very disappointed with this.
Any idea how it can be fixed??????

Hello,
You are correct, Blue tooth low engergy, BTLE.(only) devices are not backward compatible with Classic bluetooth and cannot connect.
However the Apple 4S and above have Bluetooth 4.0 support.. Hardware wise it has bothClassic Bluetooth, like the 3GS, as well as Bluetooth Low Energy. There is no good reason why your 4s cannot communicate to your Sony in-dash player using the Classic bluetooth that resides in the 4S.
I know that this does not answer the why it does not work, but it should work. Do you have to somehow re-pair the new phone up to the player? Not knowing the model of the Sony it is hard to investigate.
And I hate to ask but are you sure that the Bluetooth radio is on in the phone?
JT

How to pair Windows 8.1 with a bluetooth low energy iOS Device?

Hi,
I wrote an OSX GATT Client (central) Bluetooth application, which searchs for Bluetooth LE peripheral devices, and implemented the peripheral role on iOS. Everything works fine.
Now I'm trying to write the GATT Client as a win32 application, to search for iOS BLE peripheral devices. Following the Bluetooth Low Energy MSDN specifications the devices have to be paired first. But I can't pair iOS BLE peripheral devices
(tested on iPad4) with my Windows 8.1 PC.
On my PC, I see the advertised service of my iOS Peripheral Device, but when I try to pair it fails with the message "try again, and make sure your device is still discoverable". I downloaded Lightblue ( available on itunes) to let the iOS
Device act as different peripheral roles, still the pairing request fails.
Is there another way to interact with an iOS BLE device?
Thanks a lot.

No success yet, but more information:
I am using TI's CC2540 Wireless Connectivity Development kit and their Packet Sniffer app to capture packet exchanges.
When pairing Windows to the TI CC2541 SensorTag I see:
SensorTag advertises with ADV_IND packets that have 9 byte PDU with payload 0x02 0x01 0x05 which I believe means Flags are "LE Limited Discoverable" and "BD/EDR (BT classic) not supported". TxAdd indicates it's using a public address.
Windows sends a SCAN_REQ.
SensorTag responds with SCAN_RSP with PDU which says Complete name = "SensorTag", incomplete list of UUIDs is 0x0A 0x00, and slave connection interval range is 100ms to 1000ms.
Windows sends a CONNECT_REQ and they are off and running.
When pairing Windows to the iOS device running either LightBlue or my own app I see:
iOS advertises with ADV_IND packets with 24 byte PDU that says Flags = ("LE General Discoverable", dual-mode Controller, dual-mode Host), complete list of UUIDs is 0xEC 0x1C, and Complete name is "LightBlue". TxAdd indicates it's using
a random address.
Windows sends a SCAN_REQ.
iOS reponds with a SCAN_RSP with 6 byte PDU, where the first 6 bytes is always the (advertiser?) address, so in other words a 0 byte payload. That seems to make sense since the advertising packets have complete information.
Windows never sends the CONNECT_REQ, and pairing fails.
I am not aware of any problems with any of these packets, they look okay. But there are several differences between the two sequences and evidently Windows doesn't like the second sequence because it never sends the CONNECT_REQ.
Am I interpreting these packets correctly? Why doesn't Windows send the CONNECT_REQ packet to iOS?

Limitation List Services Bluetooth Low Energy Central

I have a central application (C #) that consume a Peripheral application services Bluetooh Low Energy (BLE). From the peripheral application services 100 are provided. But in Central application (Windows) only 40 services are listed. This is a technical
limitation of Bluetooth Low Energy (BLE) layer of Windows? Has anyone experienced this?

Might try them over here.
Windows Desktop Dev on MSDN
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Is there a simple example (desktop programming C++) for Bluetooth Low Energy devices?

Hello
i am trying to code a simple desktop application (C++ in console) to connect to a custom Bluetooth low energy service. But before i go to that, i need to code a simple application to even get the GATT properties of a BLE device.
Is there any code sample that i can use? I am having a hard time going through the examples that are given with the GATT**** functions.
And the code samples in WDK seem to be of drivers and for metro apps. None for a desktop application.
thanks a ton!

So i was able to code a program for reading (read) variables and setting notifications for (notifiable) variables from an HR BLE monitor.
Pasting it here so that it may help someone looking for an example. (may have minor bugs, but seems to work with an MIO ALPHA HR monitor). Project properties may have to be set to stdcall (Project properties->c/c++->advanced->calling convention)
//How to get notification values from a HR BLE monitor
//Ensure that you have paired the HR BLE monitor with the computer
#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <regstr.h>
#include <bthdef.h>
#include <Bluetoothleapis.h>
#pragma comment(lib, "SetupAPI")
#pragma comment(lib, "BluetoothApis.lib")
#define TO_SEARCH_DEVICE_UUID "{0000180D-0000-1000-8000-00805F9B34FB}" //we use UUID for an HR BLE device
//this is the notification function
//the way ValueChangedEventParameters is utilized is shown in
//HealthHeartRateService::HeartRateMeasurementEvent()
//a function in Windows Driver Kit (WDK) 8.0 Samples.zip\C++\WDK 8.0 Samples\Bluetooth Low Energy (LE) Generic Attribute (GATT) Profile Drivers\Solution\WpdHealthHeartRate\HealthHeartRateService.cpp
void SomethingHappened( BTH_LE_GATT_EVENT_TYPE EventType, PVOID EventOutParameter, PVOID Context)
printf("notification obtained ");
PBLUETOOTH_GATT_VALUE_CHANGED_EVENT ValueChangedEventParameters = (PBLUETOOTH_GATT_VALUE_CHANGED_EVENT)EventOutParameter;
HRESULT hr;
if (0 == ValueChangedEventParameters->CharacteristicValue->DataSize) {
hr = E_FAIL;
printf("datasize 0\n");
} else {
printf("HR ");
//for(int i=0; i<ValueChangedEventParameters->CharacteristicValue->DataSize;i++) {
// printf("%0x",ValueChangedEventParameters->CharacteristicValue->Data[i]);
// if the first bit is set, then the value is the next 2 bytes. If it is clear, the value is in the next byte
//The Heart Rate Value Format bit (bit 0 of the Flags field) indicates if the data format of
//the Heart Rate Measurement Value field is in a format of UINT8 or UINT16.
//When the Heart Rate Value format is sent in a UINT8 format, the Heart Rate Value
//Format bit shall be set to 0. When the Heart Rate Value format is sent in a UINT16
//format, the Heart Rate Value Format bit shall be set to 1
//from this PDF https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=239866
unsigned heart_rate;
if (0x01 == (ValueChangedEventParameters->CharacteristicValue->Data[0] & 0x01)) {
heart_rate = ValueChangedEventParameters->CharacteristicValue->Data[1]*256 + ValueChangedEventParameters->CharacteristicValue->Data[2];
} else {
heart_rate = ValueChangedEventParameters->CharacteristicValue->Data[1];
printf("%d\n", heart_rate);
//this function works to get a handle for a BLE device based on its GUID
//copied from http://social.msdn.microsoft.com/Forums/windowshardware/en-US/e5e1058d-5a64-4e60-b8e2-0ce327c13058/erroraccessdenied-error-when-trying-to-receive-data-from-bluetooth-low-energy-devices?forum=wdk
//credits to Andrey_sh
HANDLE GetBLEHandle(__in GUID AGuid)
HDEVINFO hDI;
SP_DEVICE_INTERFACE_DATA did;
SP_DEVINFO_DATA dd;
GUID BluetoothInterfaceGUID = AGuid;
HANDLE hComm = NULL;
hDI = SetupDiGetClassDevs(&BluetoothInterfaceGUID, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
if( hDI == INVALID_HANDLE_VALUE ) return NULL;
did.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
dd.cbSize = sizeof(SP_DEVINFO_DATA);
for(DWORD i = 0; SetupDiEnumDeviceInterfaces(hDI, NULL, &BluetoothInterfaceGUID, i, &did); i++)
SP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData;
DeviceInterfaceDetailData.cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
DWORD size = 0;
if(!SetupDiGetDeviceInterfaceDetail(hDI, &did, NULL, 0, &size, 0) )
int err = GetLastError();
if( err == ERROR_NO_MORE_ITEMS ) break;
PSP_DEVICE_INTERFACE_DETAIL_DATA pInterfaceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)GlobalAlloc(GPTR , size);
pInterfaceDetailData->cbSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA);
if( !SetupDiGetDeviceInterfaceDetail(hDI, &did, pInterfaceDetailData, size, &size, &dd) )
break;
hComm = CreateFile(
pInterfaceDetailData->DevicePath,
GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
GlobalFree(pInterfaceDetailData);
SetupDiDestroyDeviceInfoList(hDI);
return hComm;
int main( int argc, char *argv[ ], char *envp[ ] )
//Step 1: find the BLE device handle from its GUID
GUID AGuid;
//GUID can be constructed from "{xxx....}" string using CLSID
CLSIDFromString(TEXT(TO_SEARCH_DEVICE_UUID), &AGuid);
//now get the handle
HANDLE hLEDevice = GetBLEHandle(AGuid);
//Step 2: Get a list of services that the device advertises
// first send 0,NULL as the parameters to BluetoothGATTServices inorder to get the number of
// services in serviceBufferCount
USHORT serviceBufferCount;
// Determine Services Buffer Size
HRESULT hr = BluetoothGATTGetServices(
hLEDevice,
0,
NULL,
&serviceBufferCount,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) != hr) {
printf("BluetoothGATTGetServices - Buffer Size %d", hr);
PBTH_LE_GATT_SERVICE pServiceBuffer = (PBTH_LE_GATT_SERVICE)
malloc(sizeof(BTH_LE_GATT_SERVICE) * serviceBufferCount);
if (NULL == pServiceBuffer) {
printf("pServiceBuffer out of memory\r\n");
} else {
RtlZeroMemory(pServiceBuffer,
sizeof(BTH_LE_GATT_SERVICE) * serviceBufferCount);
// Retrieve Services
USHORT numServices;
hr = BluetoothGATTGetServices(
hLEDevice,
serviceBufferCount,
pServiceBuffer,
&numServices,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetServices - Buffer Size %d", hr);
//Step 3: now get the list of charactersitics. note how the pServiceBuffer is required from step 2
// Determine Characteristic Buffer Size
USHORT charBufferSize;
hr = BluetoothGATTGetCharacteristics(
hLEDevice,
pServiceBuffer,
0,
NULL,
&charBufferSize,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) != hr) {
printf("BluetoothGATTGetCharacteristics - Buffer Size %d", hr);
PBTH_LE_GATT_CHARACTERISTIC pCharBuffer;
if (charBufferSize > 0) {
pCharBuffer = (PBTH_LE_GATT_CHARACTERISTIC)
malloc(charBufferSize * sizeof(BTH_LE_GATT_CHARACTERISTIC));
if (NULL == pCharBuffer) {
printf("pCharBuffer out of memory\r\n");
} else {
RtlZeroMemory(pCharBuffer,
charBufferSize * sizeof(BTH_LE_GATT_CHARACTERISTIC));
// Retrieve Characteristics
USHORT numChars;
hr = BluetoothGATTGetCharacteristics(
hLEDevice,
pServiceBuffer,
charBufferSize,
pCharBuffer,
&numChars,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetCharacteristics - Actual Data %d", hr);
if (numChars != charBufferSize) {
printf("buffer size and buffer size actual size mismatch\r\n");
//Step 4: now get the list of descriptors. note how the pCharBuffer is required from step 3
//descriptors are required as we descriptors that are notification based will have to be written
//once IsSubcribeToNotification set to true, we set the appropriate callback function
//need for setting descriptors for notification according to
//http://social.msdn.microsoft.com/Forums/en-US/11d3a7ce-182b-4190-bf9d-64fefc3328d9/windows-bluetooth-le-apis-event-callbacks?forum=wdk
PBTH_LE_GATT_CHARACTERISTIC currGattChar;
for (int ii=0; ii <charBufferSize; ii++) {
currGattChar = &pCharBuffer[ii];
USHORT charValueDataSize;
PBTH_LE_GATT_CHARACTERISTIC_VALUE pCharValueBuffer;
// Determine Descriptor Buffer Size
USHORT descriptorBufferSize;
hr = BluetoothGATTGetDescriptors(
hLEDevice,
currGattChar,
0,
NULL,
&descriptorBufferSize,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) != hr) {
printf("BluetoothGATTGetDescriptors - Buffer Size %d", hr);
PBTH_LE_GATT_DESCRIPTOR pDescriptorBuffer;
if (descriptorBufferSize > 0) {
pDescriptorBuffer = (PBTH_LE_GATT_DESCRIPTOR)
malloc(descriptorBufferSize
* sizeof(BTH_LE_GATT_DESCRIPTOR));
if (NULL == pDescriptorBuffer) {
printf("pDescriptorBuffer out of memory\r\n");
} else {
RtlZeroMemory(pDescriptorBuffer, descriptorBufferSize);
// Retrieve Descriptors
USHORT numDescriptors;
hr = BluetoothGATTGetDescriptors(
hLEDevice,
currGattChar,
descriptorBufferSize,
pDescriptorBuffer,
&numDescriptors,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetDescriptors - Actual Data %d", hr);
if (numDescriptors != descriptorBufferSize) {
printf("buffer size and buffer size actual size mismatch\r\n");
for(int kk=0; kk<numDescriptors; kk++) {
PBTH_LE_GATT_DESCRIPTOR currGattDescriptor = &pDescriptorBuffer[kk];
// Determine Descriptor Value Buffer Size
USHORT descValueDataSize;
hr = BluetoothGATTGetDescriptorValue(
hLEDevice,
currGattDescriptor,
0,
NULL,
&descValueDataSize,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) != hr) {
printf("BluetoothGATTGetDescriptorValue - Buffer Size %d", hr);
PBTH_LE_GATT_DESCRIPTOR_VALUE pDescValueBuffer = (PBTH_LE_GATT_DESCRIPTOR_VALUE)malloc(descValueDataSize);
if (NULL == pDescValueBuffer) {
printf("pDescValueBuffer out of memory\r\n");
} else {
RtlZeroMemory(pDescValueBuffer, descValueDataSize);
// Retrieve the Descriptor Value
hr = BluetoothGATTGetDescriptorValue(
hLEDevice,
currGattDescriptor,
(ULONG)descValueDataSize,
pDescValueBuffer,
NULL,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetDescriptorValue - Actual Data %d", hr);
//you may also get a descriptor that is read (and not notify) andi am guessing the attribute handle is out of limits
// we set all descriptors that are notifiable to notify us via IsSubstcibeToNotification
if(currGattDescriptor->AttributeHandle < 255) {
BTH_LE_GATT_DESCRIPTOR_VALUE newValue;
RtlZeroMemory(&newValue, sizeof(newValue));
newValue.DescriptorType = ClientCharacteristicConfiguration;
newValue.ClientCharacteristicConfiguration.IsSubscribeToNotification = TRUE;
hr = BluetoothGATTSetDescriptorValue(
hLEDevice,
currGattDescriptor,
&newValue,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetDescriptorValue - Actual Data %d", hr);
} else {
printf("setting notification for serivice handle %d\n", currGattDescriptor->ServiceHandle);
//set the appropriate callback function when the descriptor change value
BLUETOOTH_GATT_EVENT_HANDLE EventHandle;
if (currGattChar->IsNotifiable) {
printf("Setting Notification for ServiceHandle %d\n",currGattChar->ServiceHandle);
BTH_LE_GATT_EVENT_TYPE EventType = CharacteristicValueChangedEvent;
BLUETOOTH_GATT_VALUE_CHANGED_EVENT_REGISTRATION EventParameterIn;
EventParameterIn.Characteristics[0] = *currGattChar;
EventParameterIn.NumCharacteristics = 1;
hr = BluetoothGATTRegisterEvent(
hLEDevice,
EventType,
&EventParameterIn,
SomethingHappened,
NULL,
&EventHandle,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTRegisterEvent - Actual Data %d", hr);
if (currGattChar->IsReadable) {//currGattChar->IsReadable
// Determine Characteristic Value Buffer Size
hr = BluetoothGATTGetCharacteristicValue(
hLEDevice,
currGattChar,
0,
NULL,
&charValueDataSize,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) != hr) {
printf("BluetoothGATTGetCharacteristicValue - Buffer Size %d", hr);
pCharValueBuffer = (PBTH_LE_GATT_CHARACTERISTIC_VALUE)malloc(charValueDataSize);
if (NULL == pCharValueBuffer) {
printf("pCharValueBuffer out of memory\r\n");
} else {
RtlZeroMemory(pCharValueBuffer, charValueDataSize);
// Retrieve the Characteristic Value
hr = BluetoothGATTGetCharacteristicValue(
hLEDevice,
currGattChar,
(ULONG)charValueDataSize,
pCharValueBuffer,
NULL,
BLUETOOTH_GATT_FLAG_NONE);
if (S_OK != hr) {
printf("BluetoothGATTGetCharacteristicValue - Actual Data %d", hr);
//print the characeteristic Value
//for an HR monitor this might be the body sensor location
printf("\n Printing a read (not notifiable) characterstic (maybe) body sensor value");
for(int iii=0; iii< pCharValueBuffer->DataSize; iii++) {// ideally check ->DataSize before printing
printf("%d",pCharValueBuffer->Data[iii]);
printf("\n");
// Free before going to next iteration, or memory leak.
free(pCharValueBuffer);
pCharValueBuffer = NULL;
//go into an inf loop that sleeps. you will ideally see notifications from the HR device
while(1){
Sleep(1000);
//printf("look for notification");
CloseHandle(hLEDevice);
if ( GetLastError()!=NO_ERROR &&
GetLastError()!=ERROR_NO_MORE_ITEMS )
// Insert error handling here.
return 1;
return 0;
I can't run this code. I use VS2010 and Windows 8.1. When I debug my project , it show error "cannot open file 'BluetoothAPis.h'" Can you help me?

How do you connect to Bluetooth Low Energy Devices?

I have several Bluetooth Low Energy devices and I am trying to connect them to my mac mini. My mac mini has bluetooth 4.0 and should be able to connect to devices. Is the Mac mini a slave or master? how do I discover my devices? Only bluetooth 2.1EDR devices show up when i look for devices. Does apple support Bluetooth Low Energy yet?

Apple supports BLE (Bluetooth low energy) but an application must be written to allow you to pair with other devices. The onus is on the device maker to create an application that will let your Mac Mini find these devices.

Creating a Bluetooth Low Energy GATT profile server

Hello,
I am trying to implement my own client-server communication using an existing GATT profile (heartrate).
I am aware of the "Bluetooth Generic Attribute Profile - Heart Rate Service" sample, which allows me to connect to a heartrate device. However, what i want to do now is to create my own GATT server in Windows, instead of using an existing device.
Is it possible? Can someone please give me some headlights?
Thanks!

I'm not sure we can accomplish it in Windows, but these discussions may be helpful: http://stackoverflow.com/questions/19549555/creating-a-gatt-server
http://stackoverflow.com/questions/25427768/bluez-how-to-set-up-a-gatt-server-from-the-command-line
Best Regards,
Please remember to mark the replies as answers if they help

What is bluetooth low Energy ?

I am using Mac Pro Mid 2010
Prozessor      2x2.4 GHz Quad-Core Intel Xeon
Speicher        10 GB 1066 MHz DDR3
Grafikkarte     ATI Radeon HD 5770 1024 MB
Homse Studio
Yamaha n12 digital mixer
Roland Integra-7
A49 Midi Keyboord

See:
http://en.wikipedia.org/wiki/Bluetooth_low_energy
It uses less power than previous versions

Bluetooth Low Energy examples/support

Hi,
I'm wondering has anybody been playing around with BLE in LabVIEW and/or are there any examples out there? I don't want to emulate a serial port profile. I have a connectblue OLP425 (which uses the TI CC2540). Even just connecting to the device would be a good start!
Does NI have any intention of providing supporting VIs for BLE? Maybe some of the common profiles, for example?
Thanks,
Niamh

Hi Niamh,
Since your module is the one which is doing all of the comms there is no need to directly support BLE if all you want to do is communicated to the device. Looking at the datasheet of your module it appears it communicate through different ways, such as GPIO, SPI, I2C or even UART (serial) interface. So it appears that you could use a number of communication protocols and interfaces depending on what hardware you have on hand and etc. For instance, you can use an inexpensive usb DAQ device to do some of these (such as the NI USB 6008) and there are numerous examples for implementing these protocols in LabVIEW online.
Once you connect to the hardware reading the spec. sheet and deciding on how to approach the comms would be the most straightforward way to go.
Saying that, there is no specific example application built for this device as far as I'm aware of and we cannot provide support for 3rd party devices directly as well unfortunately.
Mark N
Applications Engineer
National Instruments UK & Ireland

Bluetooth 4.0 - When Will BLE - Blue Tooth Low Energy Be Supported?

Hello,
I recently acquired at W530 - has the BlueTooth radio from Broadcom - I thought 4.0 supported BLE and all of the 'smart' features.
I am actrually developing a product for BLE and one of the reasons I picked up this laptop was for the 4.0 Radio - can anyone tell me when Broadcom/Lenovo will have the Bluetooth SMART Apps (BlueTooth Low Energy or BLE) enabled for this laptop?
I actually had to go out and buy the Nano Dongle for me an my co-workers from SMKLINK (CSR Radio) in order not to impede progress on this project - a little embarassing for Lenovo I think.
If BLE is enabled - please let me know how to configure it.
If not - and I think the answer is not - when will Lenovo get this enabled - something that the W530 should ship with IMHO.
THANKS IN ADVANCE! (I STILL MY THINKPAD!)
John Dubbya

Hello Lenovo,
Blue Tooth Low Energy Driver. The Broadcom radio that you shipped supports it.
You do not have a driver that supports it.
Why?
Spoiler (Highlight to read)

Can i use two bluetooth devices simultaneously with iphone 4s? Specifically,a bluetooth headset, as well as a new low energy bluetooth heart monitor?

Can I use two bluetooth devices simultaneously with iphone 4s? Specifically a bluetooth headset as well as a new low-energy smart bluetooth heart monitor?

I don't believe so.

LaserJet MFP M175nw-- low energy mode or shut down?

I recently upgraded to an HP MFP175 nw. I use this printer in a home environment on a stand alone laptop. I don't need to print documents on a daily basis, which raises my question: Is there an advantage in leaving the printer on in it's sleep/low energy mode for hours or even days at a time when not in use or should it be completely powered down? I'm not concerned with the power draw in leaving it on and in doing so it avoids the re-initializing process that the printers has to go through each time it is powered on. Which is better or does it not really matter? thanks in advance.
This question was solved.
View Solution.

Personally I leave my CP1525 on all the time and let the automatic power management take care of things. I think there is less stress on the unit this way and probably better toner life due to less initialization routines.
Bob Headrick, HP Expert
I am not an employee of HP, I am a volunteer posting here on my own time.
If your problem is solved please click the "Accept as Solution" button ------------V
If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

Permanent low energy consumption mode in Lion

Hi,
Is there a way to make the machine always work in low energy consumption mode, no matter how much workload there is, like pre Lion machine?

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.
Feedback

Do you find that connecting to a Bluetooth keyboard creates issues w/ the new iPad's performance?

Do you find connecting to a Bluetooth keyboard creates issues w/ the new iPad's performance?

I have an Adesso case with bluetooth keyboard for my iPad 2. No affect on performance. Keybord easier to use compared to on-screen keyboard. Plus it has more keys compared to on-screen keyboard.
 Cheers, Tom

Low performance issue with EPM Add-in SP16 using Office Excel 2010

We are having low performance issues using the EPM Excel Add-in SP16 with Excel 2010 and Windows 7
The same reports using Excel 2007 (Windows 7 or XP) run OK
Anyone with the same issue?
Thanks

Solved. It's a known issue. The solution, as provided by SAP Support is:
Dear Customer,
This problem may relate to a known issue, which happens on EPM Add-in
with Excel 2010 when zoom is NOT 100%.
to verify this, could please please try to set the zoom to 100% for
your EPM report in question. and observe if refreshing performance is
recovered?.
Quite annoying, isn't it?

Bluetooth low energy issues

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