Database Develop

IR Remote Control Transmitter Module

Has anyone tried the remote control software Total Remote with the related infra red transmitter module on the XDA(http://www.griffintechnology.com/griffinmobile/totalremote/index.html)

I am trying it with the XDA II.
To send it works fine, but I am having big trouble to make it learn.
Felipe

More details on this product
I have checked the website but cannot find out more details.
What hardware does the product come with? It looks like a small round "ball" and from the website sounds like it plugs in via the speaker socket.
How does this "ball" attach to the PDA?
Do you have to use the earphone socket on the PDA for the "ball" to work? If so does that mean all sounds are directed through the "ball" and you get no sounds from the PDA until the headphone jack is unplugged?

at least judging from that ipaq picture is does use the audio connector because thats where the ipaqs connector is

Here is what I discovered with my experience using the Total Remote:
1st- Yes it is like a ball with two (they claim) powerfull IR trasmitter (see site)
2nd - Yes it goes on the earphone jack
3rd - Yes you lose the sound while using it. But the you just need to lose the conector a little not take it all off.
4th- Since the conector in the XDA II is proprietary, you will need to buy a special adaptor. I found one at expansys and it work pretty well, plus it is small and is curved, so if you use the standard XDA II case you can bend the wire and conector to the side of the case and plug the TR module, you then can adapt some kind of tape or leather on the side of it to keep it protected and tight with the case.
5th - The software promises to be far better then the pronto from philips. In a matter of fact it comes with a module that let you use the files used on the pronto software but they don´t appear to be as good as thee Total Remote one.
6th - The module and software will work very fine to TRANSMIT and also from a good distance (large rooms)
BUT NOT EVERYTHING IS A SEA OF ROSES: Lets enumerate the bad points.
1st - And most important, the XDA II is not capable of receive any IR signal from any remote controle and I tryed more the 15 , with diferent distances (even with the IR window of the XDA II and the remote controler windows touching each other) and diferent time pressing the buttons. If it can´t receive it cant learn, if it can´t learn it useless, unless you use any of the pre determined profiles, wich I do not because I bought this for customization. And no the module will not work to receive the signals only the IRda port of the XDA II.
2nd - By needing the adaptor you rise the cost of the entire package.
3rd - The Techsupp of Griffing technology is very bad. They do not read my emails with attention, they do not have much interest to solve problems or they are really dumb regarding the matter including their own software and module and they do not force themselves (creativity and imagination) to try a workaround with their customers. Plus they are rude.
BUT there is a possible way around the learning problem. But that involves more then only the Total Remote software and hardware and the XDA II.
I did not tested this yet but I really think this can work.
As I already told you, the Total Remote let us use the pronto files, in a matter of fact it emulate the pronto software.
If you have the software to design the pronto pages, you can do it and also get the right IR codes from the Remotte Central site. There is a very good chance you can get exactly the IR code you will need for each button on your virtual control. So it is not as pratical as learning directly from the remote control, but it is a solution.
But there is a higher level of solution for this too.
If you have a Pronto, Marantz or any other remote controler that use those files on Pronto software and hardware, you can just use it to learn all the IR signals from other controls and then load it on the computer, after that you can access the IR codes from the Pronto design software and aply them to the pages of your new virtual remote that will be loaded to the XDA II and used with Total Remote.
Unfortunatelly you will not be able to use Total Remote, but only the Pronto emulator, wich I think there is some disvantage points like lower page resolution.
If at least the people in Griffin let us aply the IR code from the software , this would make things much better. But I think they are not inclined even to take suggestion.
Hope this helps.
Any questions?
Felipe

Thank you!
It was a very interesting and clear description.
Thank you for taking the time to expain us all of that.
Chris

Thanks for that
Thanks,
That was quite enlightening.
I think I'll hold off on it though. My main use would require learning I think and it sounds convoluted to get it to use these learned commands. I think I'll have to look for something else!

sure i would had liked using my xda2 as a remote but with all that it's more trouble then it's worth

that is so informative,
but its also expensive and INTENSIVE. Clever though it seems, its hard o setup and involves additional hardware. What i would have wished for...Remote Control applications that only uses the existing XDA 2 IR port...if only it could THROW signales that far.
But thanks for the info. I might try it someday, when perfected.

There is hope! This is what I am waiting for!
Hi!
Have a look at this SD to IR remote:
http://www.novii.tv/blaster/
it now works only with PALM (on just with a few model) but the the developer promises he is developing a version for PPC!!!
Chris

chameleon said:
that is so informative,
but its also expensive and INTENSIVE. Clever though it seems, its hard o setup and involves additional hardware. What i would have wished for...Remote Control applications that only uses the existing XDA 2 IR port...if only it could THROW signales that far.
But thanks for the info. I might try it someday, when perfected.
Click to expand...
Click to collapse
Yes unfortunatelly it is an expessive and very complex solution. But at least in part I did not choosed this.
I live outside USA and this make things more complicated.
I first bought the TR, then I discovered that it does not work with the earphone jack.
Since I could not get a refund from the TR because I am not in USA and I still would like to make use of it (even because I had already paid for), I then spent more money with the earphone adaptor.
And for my bad luck, the XDA II did not worked learning those controls.
The complicated part comes from the fact that now I spent more money with two pieces of hardware and since my nature is not to give up expecially with computer things, I then tryed to find another way to make it work. I even took in consideation to remove the actual IRda and substitute it with another kind of IR emitter.
I don´t have much time also but as soon as I get some I will try my theory and let you know if it work.
Meanwhile I really suggest you to buy from another company. It is more cheapper and give less headaches.
Felipe

Have some1 tried to:...
To learn the codes using the biult in IR on the XDA and then replug the thing on the earphones jack to use the remote ?????
It's an obvious thing that may be overlooked.... perhaps ?letme know...
BTW I"m looking for the pin out of the Ir that goes onto the earphone jack as I hava stripped the ir from an IPAQ 2210 and wanna attach it to my XDA IIs....
any advise ???

Here is an interesting link. It seems you can record the "sounds" that infrared emits and utilize it. Although the article refers to ipod it also says it will work with pocket pc and laptop etc. 100 feet range.
http://features.engadget.com/entry/6336778455600767/

ok i have a htc eris and a peripheral ir blaster that connects through the headphone jack can someone make an app that uses this to control tvs and such

who makes it
Is it the total remote made by griffin? Is it the Novii?

Importing audio into the Kaiser

Hey all, I have been reading like crazy for months, have donated to the site and to some of the developers as well as pledging to the driver cause and doing my best to contact everyone from HTC to people in the press who have covered the issues as well as contacting people/organizations who haven't covered the issues yet.
I have searched and read everything I can about getting audio IN to the Kaiser and haven't seen much activity concerning the subject, so I thought it would be cool to create a thread that deals with this issue. I am going to use this thread to document my experiments. I believe this is the best way I can give back to the community aside from the financial support I show developers etc.
I am a pro musician & producer and want to use Meteor to record song ideas while I am traveling. I am looking to get line level signals into my HTC TYtN II and using the Meteor multi track recorder
http://www.4pockets.com/product_info.php?p=82
It would be very cool to use Meteor to write and record song ideas when I travel. It doesn't have to be super high quality audio, I just want to have a recording of my song ideas so I don't forget them. I have a little electronics device I plug my guitar in that makes it sound like a guitar amplifier. Think of it as a type of audio player for guitars that has an output like an ipod or whatever. I have a little drum machine and a synth keyboard and things like that (they all use line level signals). I do not want to use a microphone I want to use a line level signal from other devices.
Using this diagram
http://wiki.xda-developers.com/index.php?pagename=Trinity_EMUConnector
.... I am looking to get an electronics technician to make me a custom plug that will let me get audio into the TyTN II. I suspect that it will be a mic level signal as opposed to a line level signal but I am not sure about this. I have a great deal of experience with music gear, and very little experience with hand held devices in terms of understanding the hardware.
I suspect that whatever audio does get into the Kaiser will be treated as a mic signal, even if a direct signal is used (unless sendign data via USB is possible). I am going to try and get the tech to make a couple of custom cables using HTC's proprietary ExtUSB connector, but if I cant get one made for ExtUSB, I will get cables made that will work using one or more of the the inputs on a 3 in 1 adapter as seen here:
http://cgi.ebay.com/3-in-1-USB-3-5m...ryZ15040QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I am assuming audio applications will be able to "see" the audio once it is sent via the connection.
Some things I am looking into:
1. What format the TyTN II will use for audio that is sent in to it through a custom cable?
2. What kind of quality will the audio will be? WHat kind of control will we have over that audio?
3. Will it be stereo capable or just mono? I am fairly certain that only mono audio is possible via the mic input part of the ExtUSB input.
4. I wonder if audio can be imported in real time via USB connection or if audio can only be imported via the pins that enable a mic for phone use?
Like I said, I will share what I find out and if anyone happens to have ideas or knowledge please reply in this thread.
There are other uses too, aside from using multi track audio applications. If I can get this to work (I am pretty sure I can) , how would you use it?If you have ideas, perhaps you can sHare ways we could take advantage of importing audio into the Kaiser.

Bump this, i have been thinking about this also, if it had 2 seperate headphone and mic plugs, the adaptors for say a guitar or bass would be basic, since the mic is mono and so are the insturments. If i had the tools for micro-miniature soldering, i'd be able to do it easily. but i dont, so if any1 wants to make a couple, i would purchase it in a heartbeat.
You can use meteor or any recorder on the handset, if you're in a quiet room the internal mic does record sound pretty good. if there was a way to do multi tracks at the same time(multiple leads) now that would be something.

Yep, big bump from me. MeTeor is fantastic, having a little recording studio anywhere is great. However, getting a line-in would just open up everything!
Caleb

transmitter program for kaiser

Hi all:
recently at work one of my collegues was showing me a program in his phone (sprint's muzak..not sure about spelling, by samsung) called "Trasmitter". This program allows him to "transmit" music/mp3 files from his cell phone to a FM radio station of his choice in his car thus enabling him to listen the music through car speakers.
A week agao i had read here about a way to transmit music to car speakers using motorala equipment using bluetooth however that piece of equipment is 99 $ and this program is probably alot cheaper.
Does anyone know if a program like this exists or can be created for Kaiser/tilt/tytnII?
...p.s. conversation started by us comparing phones, which i couldn't believe he was trying to compare his 50$ phone to my 600 tilt, but he got me when he showed me that program .. something my tilt can't do :-(
any suggestions/answers/comments appreciated.

u're probably referring to the muziq, by LG. its not all just software based, it has a built fm transmitter. if you want that function for your device, then you need to buy an fm transmitter.

Yeah that is not a software issue...the kaiser does not have a built in fm transmitter, so you will need to buy a 3rd party piece of hardware in order to accomplish this. Try googling or looking on eBay...alternatively several manufactures are making bluetooth compatible in dash stereos that will work with the built-in bluetooth compatibilities of the kaiser.

thanks
thanks guys 4 replying so promptly. i'll search around to see if there is any cheaper bluetooth equipment than motorola. i'll let u guys know if i find anything.

The cheapest way is as ajmoncrief said: get an RF modulator, they're like $15 at Radio Shack, and a $5 USB to headphone adapter to connect the RF modulator to the phone. Works like a champ. You could also go ghetto-style and, instead of the RF modulator, use one of those cassette-looking things with the wire that us old folk used to hook our diskman up to the stereo, that'll work just as well and is a bit cheaper.

Htc rc e100

Hi I would like to know if HTC RC E100 will work with hd2.
Thanks for answers!

No, it won't work, because the RC-E100 has a mini USB cable and not a micro USB one, i tried it already with a RC from a friend

chrcad said:
No, it won't work, because the RC-E100 has a mini USB cable and not a micro USB one, i tried it already with a RC from a friend
Click to expand...
Click to collapse
Won't a Mini to Micro converter work?

This is a really good question. I would really like to use this control unit with my own headphones...

I'm new to the workings of the RC E100.
Could some kind soul please explain the connections for this item?
If I'm reading this correctly, does it connect directly into the micro USB port (with adapter if it works) but how does it then pick up the Music/Phone call data if it is not connected to the Audio Jack (or is it a split connection with one to the USB port & one to the 3.5 Audio Jack)?

harolds said:
Won't a Mini to Micro converter work?
Click to expand...
Click to collapse
I don't think it will work, because the mini USB cable from the RC E100 has a special configuration (cable/pin). So i think that a convertor won't work.

Dearest fellow hd2-owners,
I am searching a couple of days to a wired handsfree headset with music control for my HTC HD2. Unfortunately, i cannot find one, besides the original included by the phone, wich doesn't support exchangeable earphones.
The RC e100 is just what i'm looking for.
Can anybody tell me if it is possible with a cable between it:
3.5 mm to mini usb:
If not, can anybody tell me if there is a alternative wired handsfree headset with music control, which is supported by htc hd2... ???
Thanks ..
Kindly Regards M.

For further explaination:
With music control, i mean: song forward, song backward, volume etc..
Answer call / hangup
Thanks ..
M

I asked htc support if rc e 100 would work with mini to micro adapter and they told me that it won't been working correctly.
They also told me that something comparable to rc e100 won't be in sail soon for micro usb devices.

str0g said:
I asked htc support if rc e 100 would work with mini to micro adapter and they told me that it won't been working correctly.
They also told me that something comparable to rc e100 won't be in sail soon for micro usb devices.
Click to expand...
Click to collapse
This is a JOKE. I have the HTC desire, and the headphones that come boxed are horrible. When you finally fit them in your ear they hurt after 5 seconds. Why would you not have a socket in the damn media control bit? Every Nokia phone i have ever had comes with this basic feature.. allowing you to connect your own ear buds to the multifunction remote control.
so in this case, I’m going to have to cut up the headphones that came with the desire and attach a 3.5 socket, allowing me to connect my sennheisers and giving me the ability to control the music player /sigh GG htc. you build a sweet phone but gimp its audio playback all because u didn’t want to spend the 1 cent it would have cost to put a socket in the damn headset attachment, and not even bothering to offer an accessory.
I should point out that the headset that comes with the desire is not micro usb, but rather a 3.5 plug. It allows play, pause, skip, answer and has a mic.

I am going to jump on the bandwagon on this one too and comment on how disgraceful it is that accessories aren't interchangeable and that nothing similar is being devised for the newer generation of phones. The headset is one of the failing features of HTC units and a good quality remote would be the answer to just let people use whatever IEMs, heaphones they want.

"Luckily" my right headphone that came with it is broken already. It may have been from the start, it sounds horrible like it's scraping its voice coil and I was about to order the RC E100 when running into this thread... Thanks for saving me .
I will have no choice and no reservation to cut the earbuds off and mount a 3.5mm socket to it. I may even go and experiment if HTC added some not-yet implemented resistorvalues for a future remote control, as I did do some checks and it seems the remote on the standard headphone is a simple resistor network like e.g a Sony RM-X4S (search for panuworld and RM-X4S to see a schematic) caraudio wired remote. I wouldn't put it past them to actually have the volume-control resistor values programmed into the HD2, but simply not implemented in any accessory yet.
A happy but sometimes also disillusioned HTC HD2 owner. Next stop: voice dialing... (last I looked that wasn't solved yet either, but I've been ill so didn't actively look for a couple of months, that's also the reason I didn't get into the wired remote resistor values any further. I did measure the existing values on the standard headset remote and actually have an RM-X4S at home that might get me started with some standard values (or drawers full of other resistors))
Damn, this thread has got me excited, I wanna go home and figure this out! (They'll let me out the hospital on Thursday, but please let me know if someone somewhere has already done this work, cannot believe I would be the first to dive into this!!! "This" being the mapping of the resistor values of the OEM headphone headset remote and searching for extra resistorvalues that might have different functions (10 minutes work in mapping the values, 15 minutes putting it in writing and posting it here and another hour to butcher my headset beyond repair and hook up the RM-X4S to it, guess I might have to sacrifice my headset for science unless someone has a broken one they want to ship me, should have picked up the run-over Nokia headset I saw on the ground a few weeks back that had a 4 pin 3.5mm connector, that's all I need for hooking up other resistorvalues...Oh, I'll figure something out or indeed butcher it and ask the company to buy me a new one, as mine IS actually broken. They'll survive the extra 9€ on top of having to pay me while I am out of the running for half a year due to the illness...)
BTW, this thread is old, and there is a micro-phone 3.5mm input super simple remote available, but it does less than the OEM headset apart from you being able to plug in your own headphone. HTC HD2 Audio Adaptor for 3.5mm to 3.5mm HS U350 (with Stereo Headset + HTC Logo, Retail Pack) for 21 € That's more money than a RC E100 with a LOT less functionality: good call HTC

R-P said:
"Luckily" my right headphone that came with it is broken already. It may have been from the start, it sounds horrible like it's scraping its voice coil and I was about to order the RC E100 when running into this thread... Thanks for saving me .
I will have no choice and no reservation to cut the earbuds off and mount a 3.5mm socket to it. I may even go and experiment if HTC added some not-yet implemented resistorvalues for a future remote control, as I did do some checks and it seems the remote on the standard headphone is a simple resistor network like e.g a Sony RM-X4S (search for panuworld and RM-X4S to see a schematic) caraudio wired remote. I wouldn't put it past them to actually have the volume-control resistor values programmed into the HD2, but simply not implemented in any accessory yet.
A happy but sometimes also disillusioned HTC HD2 owner. Next stop: voice dialing... (last I looked that wasn't solved yet either, but I've been ill so didn't actively look for a couple of months, that's also the reason I didn't get into the wired remote resistor values any further. I did measure the existing values on the standard headset remote and actually have an RM-X4S at home that might get me started with some standard values (or drawers full of other resistors))
Damn, this thread has got me excited, I wanna go home and figure this out! (They'll let me out the hospital on Thursday, but please let me know if someone somewhere has already done this work, cannot believe I would be the first to dive into this!!! "This" being the mapping of the resistor values of the OEM headphone headset remote and searching for extra resistorvalues that might have different functions (10 minutes work in mapping the values, 15 minutes putting it in writing and posting it here and another hour to butcher my headset beyond repair and hook up the RM-X4S to it, guess I might have to sacrifice my headset for science unless someone has a broken one they want to ship me, should have picked up the run-over Nokia headset I saw on the ground a few weeks back that had a 4 pin 3.5mm connector, that's all I need for hooking up other resistorvalues...Oh, I'll figure something out or indeed butcher it and ask the company to buy me a new one, as mine IS actually broken. They'll survive the extra 9€ on top of having to pay me while I am out of the running for half a year due to the illness...)
BTW, this thread is old, and there is a micro-phone 3.5mm input super simple remote available, but it does less than the OEM headset apart from you being able to plug in your own headphone. HTC HD2 Audio Adaptor for 3.5mm to 3.5mm HS U350 (with Stereo Headset + HTC Logo, Retail Pack) for 21 € That's more money than a RC E100 with a LOT less functionality: good call HTC
Click to expand...
Click to collapse
Keep us posted man. Always interested in new audio hacks for the HD2. I'm missing the volume control too!

RC e100 via adaptor to HD2 possible?
Hello!
There is another threat (german only) which deals with connecting the RC e100 via adaptor to the HD2:
http://www.pocketpc.ch/android-allgemein/118188-htc-rc-e-100-headset.html
Maybe the following idea is totally nonsense, please let me know if I'm wrong:
The RC e100 apparently uses the extendedUSB version of miniUSB.
Does anyone know if the HD2's micro USB provides extendedUSB functionality as well?
Can anyone provide a circuit diagram to modify a mini to micro usb adaptor or cable 'USB-Adapter - 5-polig Micro-USB Typ B (M) - Mini-USB, Typ B (W)' to use the extendedUSB functionality of HD2 for the RC e100?
Thanks for your reply!

felixdd said:
Keep us posted man. Always interested in new audio hacks for the HD2. I'm missing the volume control too!
Click to expand...
Click to collapse
Took quite a while for me to test, but using an RM4-XS (or something) does NOT work on the inputs of the HD2/Leo. So it seems the resistor values of this Sony car-audio remote do not trigger any 'hidden' functions, so it is likely the OEM remote on the headphone is all the functionality you are going to get.
Sorry about getting peoples hopes up...

Help building an intervalometer app??

Hey guys I am a newbie to app development and I have gotten as far as doing the tip calculator. I am trying to make an intervalometer app based on the ti- calculator app at the link below. Basically, it would use the headphone jack to trigger a camera remote shutter release at a predictable rate for time lapse photography on a Canon DSLR. Here is the TI-83 reference. Any idea how to do this on android. Any help or advice is greatly appreciated.
http://potatoeskillme.com/code/ti-86-intervalometer-for-canon-xti/

Dude, I'm really sorry I'm not skilled enough (yet) to help make this happen.
What a fantastic idea! I would love to see this happen.

Anyone have an idea how to access the audio port in code? I have to close the loop on the headphone jack for an instant and then release it.

You are attacking the wrong hole.
Audio jacks don't behave in the same way as the TI data jack.
Investigate using USB.

I would love to see some sort of wireless control of the camera's basic functions, similar to the hardware wireless control modules for those cameras.
Perhaps easier to accomplish and just as nice would be a way to make the camera a wi-fi storage device for those level Canon cameras. It would be sweet to snap shots to the phone for easy posting to the various places Android supports.

My guess would be that Dalvik (SDK level Code) doesn't have access to hardware level controls.
So this would have to have some Native (NDK Code) in c++ written to make it work. I don't think it would be entirely difficult for someone, but I personally have never tried to use an audio jack for anything other than..well...audio.

Kcarpenter said:
My guess would be that Dalvik (SDK level Code) doesn't have access to hardware level controls.
So this would have to have some Native (NDK Code) in c++ written to make it work. I don't think it would be entirely difficult for someone, but I personally have never tried to use an audio jack for anything other than..well...audio.
Click to expand...
Click to collapse
Yeah, that was kinda what I was afraid of. I have really bitten off more than I can chew with this project.

How I understand the wired remote works is that it just "shorts" the connection.
Now you may be able to simulate that by sending tones through the left/right and/or both poles. (one focuses the other shoots)
You could probably test if this would work by playing music through the cable and see if the camera reacts. I don't have a 1/8th to 1/16th cable or else I would try it myself because I am interested if it would work.
Here is a link of how to make a remote switch which you might find handy if you pursue this.
http://martybugs.net/photography/remote.cgi
Someone mentioned using the usb which would open a whole new world of what you can do. If you have ever played around with the canon software then you know you can control all the camera features from a computer and that should be possible to do on our phones but it would be a lot of work to write an app like that.

centran said:
How I understand the wired remote works is that it just "shorts" the connection.
Now you may be able to simulate that by sending tones through the left/right and/or both poles. (one focuses the other shoots)
You could probably test if this would work by playing music through the cable and see if the camera reacts. I don't have a 1/8th to 1/16th cable or else I would try it myself because I am interested if it would work.
Here is a link of how to make a remote switch which you might find handy if you pursue this.
http://martybugs.net/photography/remote.cgi
Someone mentioned using the usb which would open a whole new world of what you can do. If you have ever played around with the canon software then you know you can control all the camera features from a computer and that should be possible to do on our phones but it would be a lot of work to write an app like that.
Click to expand...
Click to collapse
USB is the way to go. I've written a few apps for windows that control canon cameras using the canon sdk. Unfortunately, the SDK is all C++, so a wrapper is needed to work with java. Plus there are functions that are windows specific. The other option for Linux is libgphoto2. Unfortunately, documentation is not the greatest (nor is it for csdk).
If I had more time, I would have coded this already. But all my coding time is spent programming for work.

centran said:
How I understand the wired remote works is that it just "shorts" the connection.
Now you may be able to simulate that by sending tones through the left/right and/or both poles. (one focuses the other shoots)
You could probably test if this would work by playing music through the cable and see if the camera reacts. I don't have a 1/8th to 1/16th cable or else I would try it myself because I am interested if it would work.
Here is a link of how to make a remote switch which you might find handy if you pursue this.
http://martybugs.net/photography/remote.cgi
Someone mentioned using the usb which would open a whole new world of what you can do. If you have ever played around with the canon software then you know you can control all the camera features from a computer and that should be possible to do on our phones but it would be a lot of work to write an app like that.
Click to expand...
Click to collapse
I am going to test your audio idea and see if it shorts the connection. Yeah, I wish I even knew where to begin with working on the USB. I am very new to this. The farthest I have gotten is building a potential layout for the program.

I just looked up some stuff.
I think the canon remote needs a little over 3volts to trigger the shutter. You are not going to be able to get anywhere close to that with the audio output.
I think the only option is to go through the usb.

centran said:
I just looked up some stuff.
I think the canon remote needs a little over 3volts to trigger the shutter. You are not going to be able to get anywhere close to that with the audio output.
I think the only option is to go through the usb.
Click to expand...
Click to collapse
Thank you for the info. I am downloading the Canon SDK right now(not that I have any idea what to do with it at this point).

is this still going? we are about to make the gsm hero usb-host-mode-able, then all that is missing is libgphoto2 and gphoto2... anyone fancy porting it?

First of all, sorry for my English.
I was searching in Google for something like this and I can't find nothing.
Using the usb is not simple, but the audio option is not crazy at all.
Obviously, that option will require some kind of interface, but can be much simple than the USB option.
You can generate different audio frequencies, for example, 1 KHz for focus and 5 KHz for shutter. With a filter for each frequency you can separate the signal in two circuits. Each circuit can trigger the camera with a transistor, in open collector configuration.
Whatever, if you choose one or another (USB or audio) you will must make some kind of electronic interface.
If someone can works with the software, I can do my part with the circuit. I'm sure that will be easy to build for anyone, even if you don't know electronics.

I am also looking into doing this sort of app, but I am starting with a Pentax k110d... Some camera's only require you to short out the wires, and doing so with the audio headphone jack seems to be possible, from the quick little test I just did with a media player, a 3.5mm jack extension cord, and a multimeter. When the track was playing, i got some resistance across the poles, but when I stopped it, I got nothing registering.
I had actually just given up on the headphone jack, and was looking into doing it over USB as well. I might just have to do several code paths, depending on what kind of camera the person is hooking up /ponder

Alrighty, I just did some more testing with a quick framework app that I had been working on for this. There is apparently a constant 1.7 mV on the headphone jack, which is enough to trigger the shutter release on my camera... boo urns... and when the tone is played, the voltage actually drops, because as all learned ppl know(at least those who paid some attention in physics) is that according to Ohms law, Resistance goes up, Voltage goes down.

Any progress on this?
I would love an intervalometer on Android for my Canon EOS 550D

+1 for the development of such app & hardware it may need.

i hate to bust your bubble but this died over a year ago

ya, development has kinda stalled out... I realized that it is not possible to do over the headphone jack, as there is always voltage there, and I don't know if it is possible just over usb...
The only way I can think that this would be possible would be to get ahold of a google hardware kit/arduino dev kit, and then program that.