[Freetel-codec2] DroidDV part deux: receiving files and text messages

[Adrian Musceac]

Hi,

I've uploaded another video demonstrating text message and file
transmission using the same setup: Android phone + handheld TRX.
The video is here:

A couple of technical details: the useful bitrate is currently 1.3 kbit/s,
with additional 8 bits per frame reserved for the access code (similar to
CTCSS and DCS). It's the same as for voice.
The framing of text messages and data is different with regards to the sync
bits. There is no way to confuse a voice frame with a data/text frame. More
frame types will be added in the future if necessary.
The UI has suffered a small HTML/CSS redesign to make it less boring and
more mobile friendly.
If I manage to learn Javascript, I will probably make it even more
appealing.

Another modem is in the design phase for those of us who can use a 9800
packet data port. If you have enough SNR margin that is.

Up in the next episodes, GPS coordinates transmission and VoIP native
bridging through Wifi or 3G.

Cheers,
Adrian

[David Rowe]

Hi Adrian,

That's really cool - well done. Lot of connectivity and other features
available almost for free in Android phones. Great that you can run
Linux inside the phone as well.

Cheers,

David

Post by Adrian Musceac
Hi,
I've uploaded another video demonstrating text message and file
transmission using the same setup: Android phone + handheld TRX.
The video is here: http://youtu.be/et7Xvob49Kg
A couple of technical details: the useful bitrate is currently 1.3
kbit/s, with additional 8 bits per frame reserved for the access code
(similar to CTCSS and DCS). It's the same as for voice.
The framing of text messages and data is different with regards to the
sync bits. There is no way to confuse a voice frame with a data/text
frame. More frame types will be added in the future if necessary.
The UI has suffered a small HTML/CSS redesign to make it less boring and
more mobile friendly.
If I manage to learn Javascript, I will probably make it even more
appealing.
Another modem is in the design phase for those of us who can use a 9800
packet data port. If you have enough SNR margin that is.
Up in the next episodes, GPS coordinates transmission and VoIP native
bridging through Wifi or 3G.
Cheers,
Adrian
------------------------------------------------------------------------------
Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San
Francisco, CA to explore cutting-edge tech and listen to tech luminaries
present their vision of the future. This family event has something for
everyone, including kids. Get more information and register today.
http://sdm.link/attshape
_______________________________________________
Freetel-codec2 mailing list
https://lists.sourceforge.net/lists/listinfo/freetel-codec2