Bluetooth® Applications - Recent Threads

Running the SSPDemo on the EZ430-RF-256X

chuck dahl1 — Fri, 17 May 2013 19:39:45 GMT

Hi,

I just received the ez430rf256x evaluation board and am trying to run the blue tooth sample program "SSPDemo". Ive tried following the process as described on the wiki link "http://processors.wiki.ti.com/index.php/CC256x_MSP430_Bluetopia_Basic_Demo_APPS".

Does the "Flashing the Bluetooth Code" section apply to the ez430rf256x hardware?

I also followed the "IAR Platform Specific" section and was able to "download and debug" the SSPDemo program. Is "downloading" the same as "flashing" the code onto the ez430?

The final step in the "IAR Platform Specific" says "g) The software is now ready to use. To begin using the profile disconnect and reconnect the EZE-430 after flashing."

So, how do I proceed with the demonstration from this point?

I proceeded to follow the procedure at "http://processors.wiki.ti.com/index.php/CC256x_MSP430_Bluetopia_Basic_SPPDemo_APP" and am unsure about how to attach a terminal program. I tried downloading and installing the Tera Term but encountered some problems.

Any advice on how to proceed from here would be appreciated.

Thanks,

Chuck

Meaning of atAuthenticationStatus Codes in Bluetopia Stack

Florian Glaser — Fri, 17 May 2013 14:47:30 GMT

Hello,

I'm programming a application for the MSP430F5438A <-> CC2564 combination and was wondering what the different Byte Status Codes in the GAP_Authentication_Event_Data->Authentication_Event_Data.Authentication_Status field mean. I've received values ranging from 0 to 16 but didn't find any spot where it says what these codes actually mean, neither in the Bluetopia Core API documentation nor in the BT 4.0 Core specification.

Thank you for your help.

Question about MSP430 and Bluetooth

Eyal Meir — Mon, 13 May 2013 15:46:50 GMT

Hi,

I am looking for a low power development board of Bluetooth and microcontroller. This board need to work of few weeks by coin battery or rechargeable Lithium.

My target is to have the ability to transfer data from mobile to the microcontroller and back via Bluetooth or BLE ( I only need to transfer a byte from mobile to microcontroller one in a few sec and return acknowledge) .

I plan to use SPP protocol to that ( if you have a better idea we will be more than happy to hear).

I have the MSP430 Launch pad but know , also I have a CC2541 sensor tag development kit (but I think it is only a transmitter and nor programmable).

I found the eZ430-RF2500 Development Tool and eZ430-RF2500-SEH , but we could not understand if we can program eZ430-RF2500 Battery Board for our on FW or this board only connecting to the other board?
- Can we use this board for our purpose
  - Serial data will be send from my android/Iphone to the MSP430 via the Bluetooth on the board.
If it does do you have a code sample for that?
http://www.ti.com/lit/ug/slau227e/slau227e.pdf
http://www.ti.com/lit/ug/slau273c/slau273c.pdf
http://www.youtube.com/watch?v=WgQPhmex8w4
http://www.youtube.com/watch?v=jWy2pwL3hn8
Also, Do you have another low power board with MSP430 and Bluetooth similar to eZ430-RF2500 Battery Board we can program.

does one of the kits from this page will be good for us?
- http://processors.wiki.ti.com/index.php/Category:BluetoothLE
  - We have CC2541 SensorTag Development Kit .
  - Does the CC2541 kit is just a transmitter?

Thanks,
Eyal

How to response PIN code automatically and use button to send data with Bluetopia SPPDemo

Xu Wei1 — Tue, 14 May 2013 10:10:42 GMT

Hi,

I am using Bluetopia Basic SPP demo app on MSP430D5438+CC2564

I am trying to initialize a constant PINcode by feeding a hardcoded PIN code as Stonestreet One replied in " bluetopia, how to response pin code automatically?".

The result is that the method dose not work because the Bluetopia SDK v1.3 is quite different with the Bluetopia SDK v1.2.

Anyone can tell me can I make it?

What's more, I have to input the "send ***" to send data from my laptop.

Is it possible to send data with the button rather than the command from PC?

sdk:CC256x_MSP430_Bluetopia_SDK_v1-3_Setup
example:SPPDemo

loading the service pack for the CC2560A

Jamaal_Charles — Fri, 03 May 2013 18:10:51 GMT

Hello,

We are looking at the instructions to load the service pack for the CC2560A, and it looks like it must be done on every power cycle. We see the hardware eval tool, but how would we do this in our embedded system? For example, at the Linux command prompt: hcitool cmd upgrade service pack file name.

It looks like the other possibility is to use the PC based tool, but that would require communication from the pc to be pasted through to the BT. Does the Hcitool have a serial port pass through?

Thanks,

Jamaal

LMX9838 - Link status and PG6

horizon — Thu, 16 May 2013 08:07:24 GMT

Hi everyone,

We're planning to use the LMX9838 in the 'cable replacement' (Report No Events, UART Break Suppressed and Ignored) mode for implementing a remote controller. The micro-controller to which the LMX9838 is connected is involved in some movement control. Here for mitigation of a certain risk, we need to suspend all movements when the link to the remote control is lost. I understand that the default function of pin PG6 is link status indication. Just not able to find any reference as to how soon the pin will be deactivated when

The remote controller moves out of range OR
gracefully terminates the connection with LMX9838

Please let me know if there is any literature containing some sort of a timing diagram, or if anyone already knows, please share the info.

Regards,

Mohith Manoj

Bluetooth tx power settings MSP430&CC2560

Ruben Barriuso — Tue, 14 May 2013 10:29:18 GMT

Hi,

I need to change 12 dBm transmitter power level because it's so high for my aplication.

I'm using the Stonestreet One bluetooth stack.

How can I change that maximum?

CC2564 Pinout and Connection Inconsistencies

Chee-Boon Lim — Wed, 24 Apr 2013 01:36:07 GMT

There appears to be some pinout inconsistencies in the following documents:-

CC256x Data Manual (Rev A dated October-2012): Table 3-1: Terminal Functions
CC256x Data Manual (Rev A dated October-2012): Fig 5-1: Reference Schematic
CC256xQFN-EM Reference Schematics (Rev 1.2 dated 13-Feb-2013)

These pinout and connection inconsistencies are as follows:

Pin #	Data Manual Designation	Data Manual (Table 3-1)	Data Manual Ref Circuit (Fig 5-1): Designation	Data Manual Ref Circuit (Fig 5-1): Connection	CC256xQFN-EM Ref Circuit (1.2): Designation	CC256xQFN-EM Ref Circuit (1.2): Connection
A10	NC	Not Connected	NC_2	GND	NC_2	GND
A11	NC	Not Connected	NC_3	GND	NC_3	GND
A14	NC	Not Connected	NC	NC	CLK_REQ_OUT	10k Pulldown (DNI) and Debug Header (P2)
B10	NC	Not Connected	NC_15	GND	NC_15	GND
B9	NC	Not Connected	NC_14	GND	NC_14	GND

SPP_Data_Write returns 0 after some period of time.

James Batcheler — Wed, 01 May 2013 18:27:12 GMT

I am running the Bluetopia stack on a MSP430F6438. We have the PAN1323 module hooked up to this MSP. The Linux bluetooth stack pairs with the PAN1323, opens a serial port, and issues a few commands. At this point, a data stream starts going from the MSP430 to the Linux computer. This data stream is around 10 kilobytes per second.

After some time (anywhere from 15 seconds to an hour) streaming data successfully, SPP_Data_Write begins to return 0, and this never changes until I restart the MSP.

EDIT: So at some point, I'm seeing a partial write. Once this happens, I'm never able to send data again. I see no 'etPort_Transmit_Buffer_Empty_Indication' event happening later to tell me I can write. Nor do I see a port closure message.

Continuous TX with BLE GFSK

Juha O — Thu, 14 Mar 2013 15:18:26 GMT

How can you enable BLE GFSK in continuous tx test? According to wiki it should happen by setting modulation parameter to 4 but when I do it, device does not send anything. Test works fine with other modulations.

Bluetooth connection performance characterization

Craig Brenner — Sat, 04 May 2013 01:10:07 GMT

We’re trying to characterize Bluetooth connection latency for various scenarios. Ideally, we would like to produce a model that shows minimum, maximum and mean connection times. Initially, I'm not looking at BLE but if you have pointers there they would be appreciated.

For the actual connection, we’re are planning to start with raw RFCOMM for a connection made to a known MAC without paring (no security). Next, we would like to add SDP to this model. Finally, we would like to add device discovery.

Does anyone know what work is already available in this area (academic papers, parts of the standard etc.). Which parts of the standard are relevant here? How do the various tunable timing parameters affect this performance? What trade-offs would one see if they deviate from the standard values?

Now for the $6M question to finish. In your experience, how do the various BT implementations measure up to this theoretical ideal?

Any pointers you can offer will be greatly appreciated for our research. I'm expecting the result of our research to be fairly rigorous so we are not afraid of any of the math that will be needed.

If it matters, we are testing using both a WL1271L based TiWi-BLE along with BlueZ 5.X and also CC256x based module using Bluetopia.

Thanks,
Craig

Selecting BT stack...

Leo2_uru — Thu, 02 May 2013 14:15:55 GMT

I am selecting which bt stack fits for me but i am not sure about it.

My hardware must be composed of a BT module with SPP/iAPP + HFP/HSP support (probably one from Panasonics as they are smaller) and also a DSP for sound generation.

I need a module in order to not waste time/money in rf design and certifications. I don't want a module with an internal DSP as i will also need a DSP for sound generation.

Also the hardware must connect to Windows PC/ MAC / iDevices and Smartphones (Android, Symbian, etc.) The goal is to have the ability to connect to all of them.

Is dotstack or Bluetopia the one that i should choose? Is there another option in the market?

Stellaris Bluetopia Stack - Bus Fault During Initialization

Alex Layton — Thu, 02 May 2013 21:08:39 GMT

I am trying to use the Bluetopia Stack on a Stellaris M4. I am trying to run the SPPLEDemo but the call to OpenStack never returns and I instead get suck in FaultISR().

Stepping through the disassembly I have found that a bus fault is occurring in CompareListEntryKeys and the fault address is 0x02112000.

The same code runs fine for me on a launchpad. I am completely at a loss for what is different that would cause this.

Any clues to how I could determine what has changed or how to make the code run would be greatly appreciated.

Alex

LMX9838 support

Johnny Lau — Fri, 26 Apr 2013 21:01:55 GMT

Team,

Are you supporting the LMX9838 device from our National aquisition? if not, can you direct me to who is? ESP contact info says LPRF.

thanks

johnny lau

SPP_Set_Configuration_Parameters always fails.

Clive Jarman — Fri, 19 Apr 2013 21:08:24 GMT

I am currently testing DK-LM3S9D96 with bluetooth modeul.

I am trying to achieve a data rate of 80KB/second from the micro controller to a Windows 7 PC.

With the current version of the SDK (version 1.0 for Stellaris), I can only achieve about 40KB / sec.

It seems that the advice to achieve higher data rates is to call SPP_Set_Configuration_Parameters.

However, whenever I call this function it returns -1.

The SPPDemo application only allows you to call this AFTER you create the server, and this seems to be too late.

I have modified this application to call it programatically before I create the server, but it also fails with error code 1.

What is the correct way to call this function?

SPP_Get_Configuration_Parameters returns 128 for the frame size and 256 for the transmit and receive buffer sizes.

There was also mention in a previous thread of an example created by StoneStreet to help in assessing bandwidth.

Is this available somewhere?

Thanks,

Clive

Using the SPP demo as a basis for my firmware

GuyM — Wed, 24 Apr 2013 15:29:13 GMT

I have already used the lite SPP demo, and was able to write a piece of code that will communicate with an Android App, and will transfer two ways data. The App can also direct the board to control different ports.

My next step was to have multiple SPP connections possible. Using the new demo, I was able to do so.

Using all the demos, and changing slightly their code, was not too complicated.

Any of the non-lite demos are controlled using a computer terminal.

I would like to have multiple boards connecting to each other and to an Android App. To do so I would need the boards to inquire for devices in their proximity, check RSSI levels, pair and connect with multiple units.

They should be able to independently interact with different units.

Since the whole bulk of code is not that straight forward to manipulate, what would you recommend to do in order to start developing this kind of application? Do you have more detailed development guide?

Thank you

ez430-rf256x Bluetooth multipoints transmission synchronize

WU MENG CHE — Thu, 25 Apr 2013 08:40:37 GMT

Hi all

I have bought three sets of ez430-RF256x. In order to try the multipoints transmission synchronize. I use one USB dongle and three target boards with battery boards.

I want to ask whether I rewrite the SPP DEMO can reach the goal or not. If it's right, I also want to ask how to rewrite .

Please give me some advices.

Thank all

Send Temperature to smartphone via bluetooth

R��diger Alshut — Thu, 25 Apr 2013 10:53:46 GMT

Hi,

I'm new to microcontroller and TI.

I need a really tiny microcontoller, that reads a temperature (usually between 20-80 degree celcius) and sends that to a bluetooth interface, so that I can receive that with a bluetooth device, let's say a smartphone.

Is the CC2564 what I'm looking for? Where can/should I get started with that?

Thanks for any help!

Getting Error Code INSTANT_PASSED 0x28 trying to meet the iPhone BT connection interval

LPRF Rocks the World — Tue, 23 Apr 2013 16:57:47 GMT

Hello Forum:

We are trying to meet the Apple iPhone connection parameter guidelines using the Bluetopia stack using the PAN1323 (CC2564).
For this experiment, we are minimizing the number of variables to simplify the conditions, but still end up with the same error condition.

http://developer.apple.com/hardwaredrivers/BluetoothDesignGuidelines.pdf

From Apple document on page 18:

The connection parameter request may be rejected if it does not comply with all of these rules:

Interval Max * (Slave Latency + 1) ≤ 2 seconds
Interval Min ≥ 20 ms
Interval Min + 20 ms ≤ Interval Max

Slave Latency ≤ 4|
connSupervisionTimeout ≤ 6 seconds
Interval Max * (Slave Latency + 1) * 3 < connSupervisionTimeout

Test Hardware and Firmware:

2x MSP430F5438A + PAN1323EMK running the SPPLEDemo.

The original Bluetopia settings are:

ConnectionParameters.Connection_Interval_Min = 50;
ConnectionParameters.Connection_Interval_Max = 200;
ConnectionParameters.Minimum_Connection_Length = 0;
ConnectionParameters.Maximum_Connection_Length = 10000;
ConnectionParameters.Slave_Latency = 0;
ConnectionParameters.Supervision_Timeout = 20000;

We have run the test with this timing:

ConnectionParameters.Connection_Interval_Min = 20;
ConnectionParameters.Connection_Interval_Max = 50;
ConnectionParameters.Minimum_Connection_Length = 0;
ConnectionParameters.Maximum_Connection_Length = 10000;
ConnectionParameters.Slave_Latency = 4;
ConnectionParameters.Supervision_Timeout = 20000;

and this timing, with the timeout meeting Apple guidelines:

Both cases result in the disconnect reason code 0x28 returned by the server device. The Connection_Interval_Min was changed to ensure there was no problem from it being the same value as the Connection_Interval_Max and knowing that stack will use the max value for the actual connection timing if possible. The sniffer log proved the max value was being used.

The distance between the two boards during the experiment was about 3 feet. The nearest WiFi access point is about 15 feet away.

Any insight?

LPRF Rocks the World

Problems connecting to SPP Server from Windows

Clive Jarman — Thu, 18 Apr 2013 22:47:35 GMT

I have just downloaded the bluetopia SDK and am trying to test the SPPDemo application with a Windows 7 SP1 notebook.

I am using the DK-EM2-2560B kit for the DK-LM3S9D96 evaluation board.

I am opening a SPP Server port on the stellaris side and trying to open a serial port on the PC to connect to it.

When I first did this, everything worked OK.

I managed to pair succesfully and Windows created a virtual serial port for communication:

Server>
atPINCodeRequest: 0x402cf4180c08
Respond with: PINCodeResponse

Server>pincoderesponse 65808515
GAP_Authentication_Response(), Pin Code Response Success.

Server>
atLinkKeyCreation: 0x402cf4180c08
Link Key Stored.

While opening the com port from the windows pc, the server reported

atLinkKeyRequest: 0x402cf4180c08
GAP_Authentication_Response success.

Server>
SPP Open Indication, ID: 0x0002, Board: 0x402cf4180c08.

Server>
SPP Port Status Indication: 0x0002, Status: 0x000b, Break Status: 0x0000, Length: 0x0000.

I could then send data back and forth over the bluetooth link.

I then powered down the stellaris board for the night and went home.

The next day I powered it back up, and could not open the virtual com port from the PC (windows remembered the paired device, so i did not need to pair it again)

Whenever I tried to connect I only got the following response on the stellaris board:

atLinkKeyRequest: 0x402cf4180c08

GAP_Authentication_Response success.

I could never get it to connect!

Then in desparation I removed the device from Windows and re-paired it to the stellaris board.

When I then tried to connect it worked, and I got the following response on the stellaris side:

atLinkKeyRequest: 0x402cf4180c08

GAP_Authentication_Response success.

Server>
SPP Open Indication, ID: 0x0002, Board: 0x402cf4180c08.

Server>
SPP Port Status Indication: 0x0002, Status: 0x000b, Break Status: 0x0000, Length: 0x0000.

I then looked at the code for the SPPDemo example and saw that the code behaved differently if it had the link key information for the requested connection

/* Setup the authentication information response */
/* structure. */
GAP_Authentication_Information.GAP_Authentication_Type = atLinkKey;
GAP_Authentication_Information.Authentication_Data_Length = 0;

/* Link Key information stored, go ahead and */
/* respond with the stored Link Key. */
GAP_Authentication_Information.Authentication_Data_Length = sizeof(Link_Key_t);
GAP_Authentication_Information.Authentication_Data.Link_Key = LinkKeyInfo[Index].LinkKey;

It seems that Windows will only complete the connection if the GAP_Authentication_Information.Authentication_Data.Link_Key is filled in.

My question is, is this a problem with Windows, or is the SPPDemo program doing something wrong?

(sorry for the long post)

Clive

Problem in GAP profile (when connecting ) under Windows 7 and newer.

mikael elharrar — Sun, 14 Apr 2013 13:58:02 GMT

Hi Stonestreet,

My device export SPP profile and should transfert data with Window 7 computer.

The problem is, after receiving message "atLinkKeyRequest", I don't get anything else, and the stack is in "unkown state" since it is waiting for a connection or a pincode message.

In my console log, I get these traces:

[debug]
[debug]_open_stack().
[debug]Bluetooth Stack ID: 1
[debug]Device Chipset: 4.0
[debug]BD_ADDR: 0x0018343A7A6A
[debug]HCI_Reconfigure_Driver(921600): Success.
[debug]spp set config succedded...
[debug]Server Opened: 1.
[debug]Change buffer succedded.
[debug]Succedded to open spp port
[debug]atLinkKeyRequest
[debug]GAP_Authentication_Response succedded

.... and nothing else...

Can you help me please ?

Thanks

Mikael

Direct HCI VS calls to PAN1323 fail...

Tim Bergin — Sun, 21 Apr 2013 23:39:30 GMT

I am using MSP-EXP430F5438 host[s] and PAN1323ETU controller[s] as an initial development system for a series of products that will work together in a piconet. The piconet will provide proprietary functionality. This is an embedded application in which none of the hosts implement an operating system. Instead, each is using a non-preemptive task manager to initiate and manage BT connections via the HCI.

At this time there is no problem using the out-of-the-box PAN1323 controller (i.e. without loading a service pack) to implement a range of HCI commands. However, the PAN1323's cannot be made discoverable in their default mode and so I am working on loading the latest flavor of service pack.
Note: the HCI can now be used to carry out Inquiries and do other things,such as Remote_Name_Requests. The UART connection between Host and Controller
is functioning well. The radios appear to be working. The controller is responsive.

The service packs (as far as I know) depend upon HCI Vendor-Specific commands to carry out various actions. The use of HCI VS commands has been discussed elsewhere on this forum (one example discussed was the rewriting of the controller BD_ADDR). The service pack data appears as an array of properly formatted HCI VS command packets which can be transmitted to the Controller as-is (albeit with Event arbitration for packets).

My immediate problem is that any HCI VS command that is issued during BT initialization generates a Command_Complete_Event containing an invalid OpCode and an Unknown HCI Command error code (the actual Event packet for any command is: 04 0E 04 01 01 01 01).

A Hardware Reset (nSHUT_DOWN set low for > 5ms) is done for the PAN1323 and the Controller CTS is monitored before attempting to write any service pack data.

Attempts to send individual VS HCI command packets also fail, although commands such as HCI_VS_Get_System_Status and HCI_VS_Read_Patch_Version fail without generating any event response to the Host. After sending these commands the PAN1323 must be reset before it will respond to subsequent commands.

So...

1] Can the PAN1323 (and its siblings) be operated without using any vendor-supplied code above the HCI... can a full application be created using only proprietary code to drive the HCI? (this would be compliant with the BT specification)

2] Can the HCI VS commands be issued directly?
i.e. is it necessary to use some proprietary method to somehow "unlock" the controller or implement an HCI VS lock/unlock sequence, such as by using the HCI_VS_Start/Stop_VS_Lock sequence...which require knowing the appropriate software version information? This doesn't appear to be a Start/Stop_VS_Lock problem since a "brute force" test was used to test all possible version values and...it failed.

3] If [1] is possible, then what must be done to unlock the full potential of the PAN1323, allowing the device to be discoverable and connect with other controllers?

4] What questions should I be asking?

Thanks.

CC256x fails HCI VS commands...

Tim Bergin — Mon, 22 Apr 2013 19:53:33 GMT

Hello,

I suspect that the post that I left at http://e2e.ti.com/support/low_power_rf/f/660/t/260129.aspx was both too long and failed to get to the point quickly enough.

The problem is that HCI VS commands sent to the Controller fail, typically returning a Command_Complete event packet indicating that the commands are not recognized. This is consistent with a note regarding HCI_VS_Start_VS_Lock that was found in an HCI VS guide for the BL6450.

This problem means [it seems] that I am not able to load an initialization script into the Controller. More details regarding why I want to do this are included in my other post (link included above).

Aside from the Panasonic wrapper (a PAN1323) for the TI Controller, this is a TI-centric application using CCS v5 for development and MSP430F5438 for the Host. The Host is running a non-preemptive task manager (no OS), and the Controller is responsive to other HCI commands. However, the BT radio cannot currently be made discoverable, which is the reason for running an initialization script (a service pack).

Help with this would be greatly appreciated!

Bluetooth profiles + HTML5

Leo2_uru — Thu, 11 Apr 2013 14:22:55 GMT

Hi all,

I am considering bluetooth technology for my accessory but i have some prior questions. I have no experience developing BT hardware.

My accessory must connect to the most of BT devices (PC/MAC/iDevices/Smartphones). It is a medical device that must run for 8 hours generating sounds defined by some predefined parameters. Pure tones/ filtered white noise must be internally generated. Also, some music tracks could be played. In order to change this parameters i am thinking of use BT. BT will be only turned on for this purpose. I guess the SPP profile is what i need for that.

Besides, i need to establish a VOIP connection through internet between the doctor and the patient. Some pc software will have to make the bridge between BT and internet... For this i guess i need the HFP.

The tracks could be stored in some internal memory. FTP could be used i guess or SPP...

The problem is that i need to use SPP and HFP profiles at the same time because sometimes i need to use VOIP and also change the internal parameters. The VOIP helps the patient to communicate easily with the doctor when the doctor needs to change the parameters.

Is this possible? Can i run both profiles in different "sockets" at the same time? Can i create and close several profiles in a the same connection?

Or do i have to create my own profile?

Besides, we are thinking of connecting bluetooth with HTML5, it would be great to run the same code in several devices (PC/MAC/iDevices/Smartphones)... Is something done about this?

P.S.: The main aim of our accesory is to connect it to a html5 or html5 + native app to make different devices connection possible. Also, we have to create sounds and send them to earpieces. We have discarded audio streaming due to have better battery perfomance and to use one battery instead of two... Maybe there is another solution available and we haven't thought about it...

Kind regards.

Using SPP profile from the BT stack and adding my own code

GuyM — Tue, 22 Jan 2013 16:52:31 GMT

I have started development of using the cc2564 and the MSP430BT controller.
I have downloaded the Bluetopia stack and have successfully used the examples projects as is, and also tweaked them a bit.
I am basically looking to use the SPP profile, with a very simple communication protocol. On top of that I want to add my own code to use the controller for ADC, I2C etc...
Understanding the whole flow of the BT stack is not so simple for me.
I have read all the forum relevant questions and answers (E2E) and the wiki pages. But was wondering if there is a document describing how to add my own code into a simple SPP project.

Thank you