BlueBus: A fully integrated A2DP Bluetooth solution

[t3ddftw]

Lol thanks for the guarantee!😎

I will be looking into getting it, in the videos there is a "phone option hardware piece with wiring cable" https://youtu.be/3BQf-GmpC-A. Is that option on the website as a package with the main module?
Appreciate your work & quick reply

There are different ones depending on year and model -- https://www.bluebus.dev/telephone-adapters

The adapter is not included and must be purchased separately: https://www.ecstuning.com/b-bluebus-parts/

Thanks!
-Ted

[coolchill]

Lol thanks for the guarantee!😎

I will be looking into getting it, in the videos there is a "phone option hardware piece with wiring cable" https://youtu.be/3BQf-GmpC-A. Is that option on the website as a package with the main module?
Appreciate your work & quick reply

[t3ddftw]

Hi I just happened to come across the thread & watched the youtube videos, & definitely appreciate all the hard work you have put into the product. Hoping it will be the best phone integration for this generation of BMW🔊📲📳

Thanks! If you can find something that works better, I'll buy it myself

[coolchill]

Hi I just happened to come across the thread & watched the youtube videos, & definitely appreciate all the hard work you have put into the product. Hoping it will be the best phone integration for this generation of BMW🔊📲📳

[t3ddftw]

Thanks for the response.
The problem I am trying to fix is that I played around with the PICKit trying to be a smartass 😁 and now I do not have the bootloader, I can still burn the firmware, but bootloader is not working when I try to burn it.

Hahaha. Alright, easy enough --

1. Put the recovery jumper in the short position
2. Hook up the PICKit to the BlueBus
3. Download and burn this hex file via the IPE: https://t3ddftw.s3.us-east-2.amazona...loader_1_5.hex

If that doesn't work, I can guide you through building the firmware with MPLAB X / xc16 and that has never failed to burn the bootloader before.

Thanks!
-Ted

[jjanis]

It's not possible, by design, to update the bootloader in field. What problem are you trying to fix?

You can burn the bootloader using a PICKit though.

Thanks!
-Ted

Thanks for the response.
The problem I am trying to fix is that I played around with the PICKit trying to be a smartass 😁 and now I do not have the bootloader, I can still burn the firmware, but bootloader is not working when I try to burn it.

[t3ddftw]

Hi, does anyone know how to upload the bootloader to the BlueBus, When I upload it with IPE default config it is not recognized by the BlueBus_Firmware_tool.exe

It's not possible, by design, to update the bootloader in field. What problem are you trying to fix?

You can burn the bootloader using a PICKit though.

Thanks!
-Ted

[jjanis]

Hi, does anyone know how to upload the bootloader to the BlueBus, When I upload it with IPE default config it is not recognized by the BlueBus_Firmware_tool.exe

[t3ddftw]

Socket the main module and produce daughterboards for SD/other ancillary support - this seems to me the clear choice.Grants SD support to those who are willing to pay the premium without impacting the majority of us who wouldn't utilize it. Understanding this is your number one feature request, why not make it your first add-on mod? You have a ton of demand for the current feature set today.




The E8x DSP Amplifier arrived today as expected, without the coax jack. Is this the one you bought from Mouser?

Thanks a lot for this idea! That actually opens up a way to solve all issues --
1. Support high quality SD Card audio by transferring it over (wired) I2S between the two units
2. Support the older BlueBus units by allowing audio transfer over Bluetooth (SBC, thus lower quality).

I would likely implement the add-on as its own encased unit with a short pigtail to either run to the BlueBus 2.0, or split the three pin power/bus connector on the 1.0.

Yep, that's the SMB jack! Digikey has it a bit cheaper: https://www.digikey.com.au/en/produc...146-75/1011994

I'm pretty sure the factory decided to wave solder the DSP PCBs, so there's already solder on that pad. I tried to wick it all up when I did the one unit, but ultimately it's just easier to blast it with 300C hot air while holding the SMB connector on the pad with some downward force to allow it to drop through the solder once its molten. Any Amazon cheapo hot air rework station works -- I've been using my $35 858D for at least three years now and it's still going strong.

Thanks!
-Ted

[Obergoose]

...so my wife actually suggested that I make an add-on module with an ESP32 and microSD card slot that will sit next to the BlueBus and stream your music files to the BlueBus. This means that I could bring microSD support to _all_ BlueBus units and I would also allow you to go through the directories using the HU so you can select your music files.

For those of you that want microSD card support, is this acceptable?

Socket the main module and produce daughterboards for SD/other ancillary support - this seems to me the clear choice.Grants SD support to those who are willing to pay the premium without impacting the majority of us who wouldn't utilize it. Understanding this is your number one feature request, why not make it your first add-on mod? You have a ton of demand for the current feature set today.

They also don't all come with the digital input connector as it was phased out, but I can and have retrofit it onto this style amp successfully (literally just soldered on an Amphenol brand connector from Mouser).

The E8x DSP Amplifier arrived today as expected, without the coax jack. Is this the one you bought from Mouser?

[Mattn1192]

I barely listen to music when I’m in the E46. But when I get this Bluetooth capability, that will change..

[t3ddftw]

I stare at the calendar everyday waiting for October to come lol

The scary (but good) thing is that time flies

[Mattn1192]

I stare at the calendar everyday waiting for October to come lol

[t3ddftw]

Hey guys,

It doesn't look like the ESP32 is going to work out. It does most of what I need it to, but on the calling side of things I can't get the software echo cancellation to work, and even then it's reported to be pretty poor. That means I would have to source and use a DSP to perform the software echo cancellation, and all the ones that would work are A: Expensive ($6+/unit at scale), B: impossible to buy in smaller quantities, and C: Not in stock for the next span of time.

I'm leaning towards the BM83 from Microchip, as it's still way cheaper than the BC127 I used before, and it has all the same bells and whistles (including a built-in DSP with acoustic echo cancellation).

That leads me to my current conundrum: microSD Card support. The BM83 does nothing to support it, so my wife actually suggested that I make an add-on module with an ESP32 and microSD card slot that will sit next to the BlueBus and stream your music files to the BlueBus. This means that I could bring microSD support to _all_ BlueBus units and I would also allow you to go through the directories using the HU so you can select your music files.

For those of you that want microSD card support, is this acceptable? The alternative would be a Rube Goldberg-esq setup where the BlueBus has an ESP32 and a BM83 but the ESP32 is only used for microSD support. This would increase the cost and complexity of the BlueBus, but you'd get negligibly better audio quality since the files wouldn't be transmitted over Bluetooth. Of course, it would only work for 2.x+ boards.

If you're wondering why I don't use an MP3 decoder, it's because they're $6.50/unit @ 250 units minimum -- no thanks.

Thanks!
-Ted

[Obergoose]

Bubba, here's a chart of P/Ns to reference if you're trying to source this amp. Data is derived from RealOEM.com and my notes about which units don't have coax is only an assumption based on the fact BMW still sells 2 versions of this unit - 304 & 102.

E83 (X3) & E85 (Z4) Models	Begin	End	Note
65126923900	9/2/2002	7/5/2002
65126930046	9/2/2002	9/24/2002
65126936087	2/20/2003	5/27/2003
65126932417	2/20/2003	2/5/2007
65126936952	4/25/2003	8/22/2003
65126938189	9/1/2003	9/29/2004
65126946727	3/1/2004	4/1/2005
65126963304	3/18/2005
65126974231	9/1/2005	5/11/2011	No Coax
65129125751	3/31/2006	6/23/2007	No Coax
65129138102	9/18/2007		No Coax

65129138102			Models used in...
		2010 X3	xDrive30i
		2009 X3	xDrive30i
		2008 X3	3.0si
		2007 X3	3.0si
		2008 Z4	Coupe 3.0si, M Coupe, M Roadster, Roadster 3.0i, Roadster 3.0si
		2007 Z4	Coupe 3.0si, M Coupe, M Roadster, Roadster 3.0i, Roadster 3.0si
		2006 Z4	Coupe 3.0si, M Coupe, M Roadster, Roadster 3.0i, Roadster 3.0si
65126963304
		2006 X3	3.0i
		2005 X3	2.5i, 3.0i
		2004 X3	2.5i, 3.0i
		2004 Z4	2.5i, 3.0i
		2003 Z4	2.5i, 3.0i
		2005 Z4	2.5i, 3.0i