[TODO] Enable FM Transmitter

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-={antibyte}=-

Member
Jan 9, 2011
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Feb 7, 2011 at 10:37 PM
The combined WLAN / Bluetooth / FM chip in the Defy ( WL1271 ) is able
to not only receive FM Radio, it can also transmit Audio !

Both solutions support Bluetooth specification v2.1 + EDR, and provide FM transmit and receive functions to turn the handset into a personal area broadcast device.
Click to expand...
http://focus.ti.com/general/docs/wt...993&DCMP=WTBU&HQS=ProductBulletin+OT+wilink_6

So another locked feature that would make the Defy even better.
This thread is to collect informations that could help to enable it.
 
Last edited:
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danbutter

Senior Member
Feb 1, 2008
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Feb 7, 2011 at 11:48 PM
I always wondered why nokia is the only company (I know of anyway) that puts FM transmitters in their phones.
It is such a good way to listen to your music in unfamiliar places like friends house, rental cars, work cars.

This would be awesome to see working!!
 
C

chaihg

Senior Member
Nov 15, 2010
497
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Feb 8, 2011 at 12:34 AM
-={antibyte}=- said:
The combined WLAN / Bluetooth / FM chip in the Defy ( WL1271 ) is able
to not only receive FM Radio, it can also transmit Audio !


http://focus.ti.com/general/docs/wt...993&DCMP=WTBU&HQS=ProductBulletin+OT+wilink_6

So another locked feature that would make the Defy even better.
This thread is to collect informations that could help to enable it.
Click to expand...
I know this will be the dumbest question to ask, but can we also use it with mic and speaker for it to make it work like a two way communication device. Eg; police radios
 
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AtomCity

New member
Apr 7, 2009
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Paks
Feb 8, 2011 at 2:20 AM
In my opinion:
everybody must wait for the motorola that they would open the bootloader for the developers who will write the necessery drivers... like the 720p record and touch to focus
 
7

7iain7

Member
Dec 12, 2010
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Kidderminster
Feb 8, 2011 at 9:17 AM
Aerial

1806 said:
Nokia N86 have special internal antenna for FM Transmitter.
Click to expand...
I think you have hit the nail on the head there. unless the defy has suitable aerial which i doubt because you have to use headphone cable for the aerial.Might be wrong thought. hope i am because this was a great feature of nokia's
 
A

-={antibyte}=-

Member
Jan 9, 2011
33
33
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Feb 8, 2011 at 7:29 PM
insestito said:
its posible FM transsmisor on Defy ???
Click to expand...
It's hard to tell.
There is no datasheet and the drivers are closed source.
If the chip does not require additional circuitry for the transmitter,
then there is a chance to get it working.
As antenna you could just cut the cable from an old headset and plug it in
while transmitting, if the same antenna is used for receiver and transmitter.
 
A

-={antibyte}=-

Member
Jan 9, 2011
33
33
0
Feb 8, 2011 at 7:37 PM
chaihg said:
I know this will be the dumbest question to ask, but can we also use it with mic and speaker for it to make it work like a two way communication device. Eg; police radios
Click to expand...
I think in theory this could be possible.
But as the range of the transmitter is max 10-20 meter, this would be
very limited :)
Maybe from one room to the other.
 
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K r i ll e

Senior Member
Dec 17, 2010
55
4
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Feb 8, 2011 at 9:18 PM
The defy would be one hell of a phone if you could get it to work, and the one/ones behind it one hell of a developer. At least to me. Can't understand how you guys discover everything and a few days later you show up with new stuff to play around with.

Is there anything you cant do with the Defy?
Crazy phone, freeking unbelivable talented developers!

Sent from my Defy
 
7

7iain7

Member
Dec 12, 2010
44
1
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Kidderminster
Feb 8, 2011 at 11:04 PM
-={antibyte}=- said:
It's hard to tell.
There is no datasheet and the drivers are closed source.
If the chip does not require additional circuitry for the transmitter,
then there is a chance to get it working.
As antenna you could just cut the cable from an old headset and plug it in
while transmitting, if the same antenna is used for receiver and transmitter.
Click to expand...
The transmitting antenna has to be a tunned length known as the SWR (standing wave ratio).The length of the antenna is extremely critical.
If a driver enabled the transmitter , but the was no antenna present irreversible damage could be coursed to the hardware.
The antenna will be internal.if the is one.
 
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A

-={antibyte}=-

Member
Jan 9, 2011
33
33
0
Feb 9, 2011 at 12:59 AM
7iain7 said:
The transmitting antenna has to be a tunned length known as the SWR (standing wave ratio).The length of the antenna is extremely critical.
If a driver enabled the transmitter , but the was no antenna present irreversible damage could be coursed to the hardware.
The antenna will be internal.if the is one.
Click to expand...
That is basicaly true, but those transmitters are only allowed to have some nanowatt (in most countries) . I think its rather unlikely an untuned antenna would break the output stage at this energy level. But i am not shure :)
But anyway, after reading some infos about the chip it looks like it has a seperate Antenna output for the transmitter that needs to be connected.
It seems unlike the Bluetooth part, audio cannot be send to the transmitter over any data path. It has to be connected to dedicated analog or digital (I2S) audio inputs. So the only way this could work at all is that Motorola connected all needed lines and just did not add software support.
I dont know how likely this scenario is ...
The transmitter is normaly controlled over the Blutooth interface via HCI.
Commands can be found here:
http://wiki.lsr.com/GetFile.aspx?File=/SWRU193G - Bluetooth Vendor Specific HCI Commands.pdf
 
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