November 2013 - Bluetooth-dev

Re: Low Energy Devices & Serial Ports
by Ringwald Matthias 29 Nov '13

29 Nov '13

Hi Jack To talk to a Bluetooth Low Energy device on iOS or OS X, you have to use the CoreBluetooth framework/API. There is no mapping to e.g. a serial port. If you really need to provide a serial port like device, you could use a pseudo tty device. see man pty. I remember there was also a way to setup such a master/slave pair programmatically but cannot remember how to do or google that. Then you could write a small app that connects and retrieves data from the Polar H7 and send it to the master of the pty pair which then can be read from SuperCollider. However, if you’re already writing native code, you could as well try to write a SuperCollier (I assume that’s possible) that just returns the heart rate monitor data. Cheers Matthias On 29.11.2013, at 12:16, Jack Clark <jackpowellclark(a)gmail.com<mailto:jackpowellclark@gmail.com>> wrote: Hello everyone, I have a query regarding Low Energy Bluetooth Devices. I recently purchased a 'Polar H7' Heart Rate Monitor and am trying to get data from it into my Mac Book Pro for use in development, however the usual Bluetooth application located in System Preferences shows no nearby devices. After having a look around, I downloaded the developer tool Bluetooth Explorer and from within this, I am able to select ‘Low Energy Devices’ from the ‘Devices’ drop down menu and then scan for Low Energy Devices. The device ‘Polar H7 2088A8’ soon pops up and I am able to select it and press ‘connect’, and as the connect button turns to ‘disconnect’ it appears to be connected (see attached images). My goal is to be able to retrieve data from the connected device into a Serial Port (I am using the audio programming language SuperCollider). Is there anyway to make my OS (10.9) let me get information from the heart rate monitor as a TTY Serial Device? Thanks -- Jack _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com<mailto:Bluetooth-dev@lists.apple.com>) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/mringwal%40inf.ethz.ch This email sent to mringwal(a)inf.ethz.ch _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Low Energy Devices & Serial Ports
by Jack Clark 29 Nov '13

29 Nov '13

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BT External Accessory pairing/notification questions
by Alexander von Below 22 Nov '13

22 Nov '13

Hello, I know that Made For iPhone (MFi) things are all super secret, but my questions concern APIs which are public in the ExternalAccessory framework, so I presume this is a good place to ask them. All questions concern a certified MFi external accessory connected via Bluetooth. 1) Pairing from the App When I call -[EAAccessoryManager showBluetoothAccessoryPickerWithNameFilter:completion:], the device I am looking for is not shown in the list. It is shown as "not paired" in the Bluetooth Section of the System Preferences, and can be paired there. I see "BTM: setting pairing enabled" in the log, but that's it. Q: Am I missing something? Or do I need to speak to the people who are building the hardware because they missed something? 2) Connection/Disconnection Notifications Sometimes, I am getting an EAAccessoryDidConnectNotification, immediately followed by an EAAccessoryDidDisconnectNotification and a final EAAccessoryDidConnectNotification for the same device. Is this behavior normal? Or is my accessory doing things it should not? Thanks a lot Alex _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: Background Connection Latency
by Alpwise iOS Dev 21 Nov '13

21 Nov '13

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Re: Background Connection Latency
by András Kövi 21 Nov '13

21 Nov '13

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Re: Bluetooth-dev Digest, Vol 10, Issue 283
by Marco Peluso 21 Nov '13

21 Nov '13

We should have literature on the other side On 21 Nov 2013, at 16:02, bluetooth-dev-request(a)lists.apple.com wrote: Send Bluetooth-dev mailing list submissions to bluetooth-dev(a)lists.apple.com To subscribe or unsubscribe via the World Wide Web, visit https://lists.apple.com/mailman/listinfo/bluetooth-dev or, via email, send a message with subject or body 'help' to bluetooth-dev-request(a)lists.apple.com You can reach the person managing the list at bluetooth-dev-owner(a)lists.apple.com When replying, please edit your Subject line so it is more specific than "Re: Contents of Bluetooth-dev digest..." Today's Topics: 1. Re: Suddenly seeing constant BLE connect/disconnect (Rick Mann) 2. RE: Help needed with IOBluetoothHandsFreeDevice (Mihai Fratu) 3. Question about characteristic value transmission from a peripheral (Richard Lipes) 4. Re: Recognizing previously connected peripheral (William Henderson) ---------------------------------------------------------------------- Message: 1 Date: Wed, 20 Nov 2013 12:06:09 -0800 From: Rick Mann <rmann(a)latencyzero.com> To: "bluetooth-dev(a)lists.apple.com Bluetooth" <Bluetooth-dev(a)lists.apple.com> Subject: Re: Suddenly seeing constant BLE connect/disconnect Message-ID: <DC2A0CAF-17D7-4E8E-9825-99D89A506814(a)latencyzero.com> Content-Type: text/plain; charset="utf-8" Oh, I think I know what might be doing this. NVM. > On Nov 20, 2013, at 11:58 , Rick Mann <rmann(a)latencyzero.com> wrote: > > We develop a BLE peripheral, normally interacting with iOS. Suddenly, on my Mac, I'm seeing very frequent Bluetooth connect/disconnect messages (as reported by Hardware Growler) between the Mac and a couple of different devices. But I'm not running any BLE apps (that I know of) on this machine. In fact, I just rebooted. And ever since Xcode dropped BLE support in the Simulator, I haven't bothered to connect at all. Also, I only have the built-in radio installed. > > -- > Rick > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/bluetooth-dev/rmann%40latencyzero.c… > > This email sent to rmann(a)latencyzero.com -- Rick

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Question about characteristic value transmission from a peripheral
by Richard Lipes 21 Nov '13

21 Nov '13

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RE: Help needed with IOBluetoothHandsFreeDevice
by Mihai Fratu 20 Nov '13

20 Nov '13

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Re: Recognizing previously connected peripheral
by William Henderson 20 Nov '13

20 Nov '13

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Re: Help needed with IOBluetoothHandsFreeDevice
by Peter Sichel 20 Nov '13

20 Nov '13

On Nov 20, 2013, at 4:32 AM, Mihai Fratu <zeusent(a)msn.com> wrote: > Peter! > > Thank you very much for your reply. I have two questions for you: > > 1. What's DTS? Who am I suppose to ask for more help? DTS stands for Developer Technical Support. Registered Apple Developers receive two “code level" DTS support incidents per year. Another big support opportunity is the Bluetooth Lab at WWDC. > 2. I already use the IOBlietoothHandsFreeDevice for connecting to my phone. I managed to connect to it, dial a number, receive an incoming call notification, but there is no audio playing on my PC during a phone call. > > The thing that I've observed is that if I search for a handsfreeaudiogateway and open an rmfcomm channel to it, my IOBlietoothHandsFreeDevice won't connect. When I call it's connect method it will just hang until my rmfcomm channel get's closed with no information why. > > If I search for a SerialPort service instead and open a rmfcomm channel to that service everything looks to go fine and my IOBlietoothHandsFreeDevice connects when it's connect method get's called. What's up with that? Bluetooth HFP (HandsFree Profile) is built on top of Bluetooth SPP (Serial Port Profile). The specs for both of these are available on line. The iPhone does not expose the SPP, but many other phones do. If you see an SPP service, it means you are not using an iPhone. To connect using the SPP, you can just open an RFCOMM channel and begin sending AT commands. There is not support for handling call audio. When connecting with HFP, an additional handshake is needed to establish a “Service Level Connection”. IOBluetoothHandsFreeDevice is designed to open the needed RFCOMM channel for you so it might fail if you have already opened an RFCOMM channel to the audio gateway service on the peer device. If you just tell it to connect with the corresponding service record, it usually works. When using HFP, the phone implements the Audio Gateway (AG) side of the HFP, while the Mac implements the HandsFree (HF) side of HFP. Technically, the Mac needs to publish an SDP (Service Discovery Profile) record indicating that it supports the HF side of HFP. Some Audio Gateways will look for this record before accepting an HFP connection. Apple’s APIs make it relatively simple to publish an SDP record, but you still have to understand the content and format of this record. Kind Regards, - Peter _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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