AVR and Bluetooth

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Hi,

Have anyone used a AVR to communicate through an Bluetooth link? I have been looking at Atmels Bluetooth evaluation- and development-kits, and it would be nice to here if anyone have used this sets with the AVR.

Best regards,
Anders Mårtensson

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It seems like I'm the onely one interested in this subjekt.
I guess i will have to put this project in the "Projects"-part of AVRFreaks when I have found anything interesting.

Maby this technique is still too expensive?!

Well anyway

Best regards,

Anders

PS. Perhaps i should ask my dentist?! ;) DS

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No, you're not the only one one interested in that subject; we experimented with bluetooth a few month ago, but then the project was postponed.
The desire for a bluetooth solution is still there, but the complexity factor seems to be quite high. We used the CSR 'Casira' kit to play around, but somehow there was no way we actually could it get going with a microcontroller. The requirements for the bluetooth software stack were not clear, and support from manufacturers was low ... except for high prices (~$60k for a software stack) and no guarantuees and adaption support.

I guess there's a lot of money in that technology, but you'll have to spend a lot of time upfront to get into it.

Volker

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No, you're absolutely not the only one interested in this topic. The problem is the more than shitty support of all the companies selling bluetooth products. But last week I red about a possible solution for that problem. The ETH Zürich developed a bluetooth solution which seems to be a perfect match to all the problems. I still got not further information but I will post it if I have'em. It seems to be the size of a matchbox and probably has the complete software @!#$ implemented already. So maybe it's able to comunicate over SPI or something. But I don't really know yet. But how I said, I will post everything I found out.

CU Alex

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hi

the url seems that it doesnt exist anymore.

anyway my profesor at the university has assinged me
as a project to communicate a pc with
an avr with bluetooth
any information i find i will post it

best regards
nikitas,chronas

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This is an ancient thread; you would be better off starting a new topic with your question, rather than resurrecting this one.

How low-level a design does your professor expect? Are you supposed to design the whole implementation, in hardware and software? That is to say, are you supposed to implement the bluetooth protocol stack from scratch in software? Then interface a raw binary signal to a bluetooth transceiver, such that the bitstream will be directly encoded on the air?

Or is this an exercise in taking pre-built solutions, and putting them together in a new way to get a unique product?

I ask this because, there are all-in-one stamp modules out there (SparkFun Electronics lists them at US$80 per unit) which will handle the entire physical- and protocol layer for you. All you have to do with the AVR is communicate via a simple asynchronous serial protocol. This module actually 'looks' to the microcontroller as if it were on the remote end of a modem. It is even configurable like a modem -- right down to an AT-style command syntax. It will connect via the RFCOMM protocol, so on your PC the connection will look like a virtual COM port.

It would be dishonest to use such a module in a project where you are expected to get down to the nuts and bolts of a physical-layer communication protocol.

But, if the bluetooth communication is considered 'secondary' (that is, it is a means to an end, but not actually the primary point of the project as a whole) then you might be wise to look into simplifications where they are available. What does your prof have to say about using an off-the-shelf solution?

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I seem to recall
There is a Swiss University doing BT with an Ericsson BT module and an AVR

They have their stuff on the net ...

/Bingo

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Good day for All.
I have made hardware implementation AVR-Bluetooth device. It based on ATMega64 and CSR bluetooth chip. This chips connected via UART and use H4 protocol for interconnect (its described in bluetooth specification). But I have some troubles with writing C code for this interconnection. I need something help and may help you too.

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Some month ago there was a small streaming MP3 player using Bluetooth and a Mega16 or a MEGA32 in the German magazine c't.

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hello everyone...
I am new to this forum.
I am a final year student of BE course (electronic) from India. I am planning to make a microcontroller based project to design a cash free automatic ticket system for tranport sytems like buses and trains.
The concept asks for using bluetooth device to communicate between a master and many slaves(pocket hand sets) to issue tickets to the travellers.
I am fairly new to this subject of bluetooth.
Please help me regarding this.
Regards
Kirtii

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kirtii,

Our company was looking at Bluetooth solutions recently and I htink we found that one of the most cost effective were those from Winbond - have a look at:

http://www.winbond-usa.com/mambo...

Cliff

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Ive just bought a few tiny embedded bluetooth module from Free2Move. Look pretty good, serial protocol to the AVR, internal antenna, and you change things like the name the Bluetooth device presents itself as, baud rate, etc. They come pre-qualified so (as I understand it, please correct me if Im wrong...) you can use the Bluetooth logo on your product.

http://www.free2move.se/products.htm

From memory they were about AUD$60 for one-offs.

Peter.

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Ive just bought a few tiny embedded bluetooth module from Free2Move. Look pretty good, serial protocol to the AVR, internal antenna, and you change things like the name the Bluetooth device presents itself as, baud rate, etc. They come pre-qualified so (as I understand it, please correct me if Im wrong...) you can use the Bluetooth logo on your product.

http://www.free2move.se/products.htm

From memory they were about AUD$60 for one-offs.

Peter.

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I've done some work with bluetooth however in low volume it is too expensive to be practical.

What is your goal of using the bluetooth application kits?

Your best bet if you want to get bluetooth running is to purchase a module designed for serial mode emulation. I've used a few, I like the one from Parallax. Very simple to use.

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Hi!
I am working as a Bluetooth developer at an university. I have successfully ported some parts of our in-house Bluetooth-stack "lwBT" to the AVR architecture. For a full port with all profiles and layers I think than an AVR with external memory is needed, which I didn't have available.

We have H4 and BCSP support for (at least CSR) BT modules. On top of that, we support HCI, L2CAP, SDP, BNEP, RFCOMM. The supported profiles are PAN, LAP, and SPP.
The IP-stack in use is lwIP, which gives us ARP, IP, TCP, UDP and ICMP.

If anybody is interested, please contact me for futher details.

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Hi,

I was wondering if someone could help me out.

Have a project for anyone thats willing to take it on. I will pay the person who takes on this project.

It involves embedding bluetooth in a device. I have the device, datalogger, need to see if someone can implement bluetooth into it.

Please mesage me for more details, or if you have any questions.

Thanks.