Hi xda-developers,
I have a serious problem with accessing the usb-port with my unrooted htc desire.
I just want to connect a switch/circuit breaker to my cellphone via usb. And than I want to be able to react on the event if somebody pressed the switch. It's only this little event that I wan't to react on.
I searched the web and found two ways to achieve my goal:
1.) Get a Bluetooth device and interact with that.
2.) Root the Desire and make/solder a usb-to-serial cable
But seriously? A Bluetooth device just to recognize if somebody pressed a hardware button? And I want to share this project so if possible I would relinquish the need of a rooted device.
So now, after hours of web-searching and reading references, I ask you, the awesome xda-developers-community: Is there any easy way to access the usb-port from within my Android-App or the Android-Scripting-Engine?
Every hint is appreciated.
.:LordAlien:.
No one an idea? Or just a little hint where I could read furthermore related to access the usb-port?
It seems like you would need a bit more than root and a USB-to-Serial cable.
Maybe if you only need one hardware switch you could use the mic button input, or play a sound to the mic input? Or use a magnet and the magnetic sensors (electromagnet, or even a neodym magnet glued to your hardware button).
Thanks for your replay.
I already read about the usb-host-capabilites, but I thought if I only want to detect on little signal I would not need the whole usb-host stuff.
Thanks for the Idea with the magnetic thing, but if I really need another device to realize my switch I will stay with bluetooth.
/edit: I thought off buying a littel&cheap bluetooth mouse and interact on the click. Would it be possible? Can I actually connect a bluetooth mouse to my android mobile phone?
I don't think a Bluetooth mouse would work, at least not out of the box. Most Android devices don't fully support the Bluetooth HID or SPP profiles. It's missing software, not hardware. But I saw that the Dell Streak apparently supports keyboards and mice.
BlueInput only supports keyboards, it seems. It doesn't need root. So apparently it should be possible to do the same for mice, but I didn't find anybody doing it yet. But maybe you can ask the BlueInput people whether mice would also work, just without a visible pointer (because Android doesn't have a visible mouse pointer). That wouldn't matter to you, but it would be useless for normal mouse users, so perhaps they just don't advertize that BlueInput can talk to mice, too.
Or maybe you can find a cheap headset which is supported by Android. The answer button should work.
Oh look, with root it works apparently.
Yeah I think you are right again. I only thought of the volume buttons on a headset therefore I suggested a mouse.
Is there list of compatible bluetooth headset? Because I already have one a Jabra BT2015 which is not supported (at least I can't get it working).
Is this happening to anyone else? I changed the device name and added a couple of paired devices. Everything works great for a while. Then if I turn Bluetooth off, the settings revert to stock. When I reboot the phone, my settings reappear. Strange.
With Bluetooth off, my paired devices don't appear in Bluetooth Settings. When I turn Bluetooth back on, they are there, just as I had paired them. I guess that's the way it's supposed to work? I never looked at the settings with Bluetooth off, only when it was on, with my former phone, so I don't know if it's different for the G2x or not.
I want to just chime in and say I cant even pair it with my car (2011 Subaru) I go through the setup and when it gets ready to ask for the PIN, the phone says 'Unable to pair, incorrect PIN.' without me even getting a chance to enter it...maybe the BT has some quirks? (My N1 BT was flawless, and this is by no means a deal killer for me)
smitty24 said:
I want to just chime in and say I cant even pair it with my car (2011 Subaru) I go through the setup and when it gets ready to ask for the PIN, the phone says 'Unable to pair, incorrect PIN.' without me even getting a chance to enter it...maybe the BT has some quirks? (My N1 BT was flawless, and this is by no means a deal killer for me)
Click to expand...
Click to collapse
Mine does the same thing (2011 Infiniti) but after the fail, a pop-up appears on the phone asking me for the PIN and then it pairs.
Resurrecting an old thread, my bluetooth settings all vanished yesterday, and turning off and on the bluetooth power did not restore them. It took a reboot. First time that's happened to me since I've had the phone (April 20).
This seems to be a pattern: things degrade over time. Either the GPS won't get a fix, or Wi-Fi Calling won't connect, or the browser gets very slow, or now the bluetooth settings vanish, and a reboot makes things work right again. This smells a lot like a heap management bug to me -- corruption, or fragmentation, or leak. I hope things are better after the Gingerbread/bug-fix update that's supposedly coming soon.
wmm said:
Resurrecting an old thread, my bluetooth settings all vanished yesterday, and turning off and on the bluetooth power did not restore them. It took a reboot. First time that's happened to me since I've had the phone (April 20).
This seems to be a pattern: things degrade over time. Either the GPS won't get a fix, or Wi-Fi Calling won't connect, or the browser gets very slow, or now the bluetooth settings vanish, and a reboot makes things work right again. This smells a lot like a heap management bug to me -- corruption, or fragmentation, or leak. I hope things are better after the Gingerbread/bug-fix update that's supposedly coming soon.
Click to expand...
Click to collapse
+1 Definitely some poor memory management in the stock kernel is to blame for this.
Try this for a bluetooth fix.. worth a shot...
http://forum.xda-developers.com/showthread.php?t=1117769
I am also having an odd BT issue. The phone pairs just fine with my 2009 Infiniti, most of the time. What i have found is that the phone decides to occassionally change its bluetooth address. After a reboot, it goes back to the original BT address that was originally paired with the car. This is kind of weird, no? Why would the phone change its BT addresss on its own?
I've seen this happen to me too. The address is part of firmware so its possible to change it just not sure why it is.
mikea3000 said:
I am also having an odd BT issue. The phone pairs just fine with my 2009 Infiniti, most of the time. What i have found is that the phone decides to occassionally change its bluetooth address. After a reboot, it goes back to the original BT address that was originally paired with the car. This is kind of weird, no? Why would the phone change its BT addresss on its own?
Click to expand...
Click to collapse
Sent from my LG-P999 using XDA App
did someone found the solution.
I am having same issue on lexus rx350, it will pair and then next day it will not find the g2x. you will have to reboot the phone, disable and enable Bluetooth to get it back or delete the profile and re enter/pair it again.
Fix(es) for Bluetooth dropping and re-pairing on Subaru and Gingerbread question
Had bluetooth settings vanish from my Subaru using lg g2x, but a bit of the history on this might add something to this discussion.
My G2x would not connect with the Subaru. Unlike another android phone the salesman had, no keyboard screen popped up so that the 1234 code could be entered. Called LG, TMobile, no help at all. LG rep was particularly hostile about this, not even seeming to understand/care about what I was explaining. Contacted Subaru corporate who suggested that the G2x had a preset 0000 code that could not be changed, so I needed to change the code on the Subaru bluetooth with another android phone, as described on the last few pages of the bluetooth section of the Subaru manual. So, paired another Android phone using 1234, unpaired that phone, and reset code to 0000 with that phone. G2x now paired rather easily.
Then, phone wouldn't even recognize Subaru bluetooth; 2 days later, spontaneously returned. Several weeks later, again vanished and wouldn't come back. Paired another phone, deleted my phone, repaired my phone, ok for now. The code remained 0000 throughout the process.
Next time this happens, I will delete my phone from the Subaru and go through the pairing process again to see what happens.
I will try the reboot the next time this returns. I appreciate this potential fix. Will alos try the repair program. My phone is not rooted.
In the meantime, can anyone tell me if a Gingerbread install will allow a keyboard to pop up so that different devices using 1234 or 0000 can be paired, and if the phone can handle pairings with 2 or more devices having different codes? Why doesn't a keyboard pop-up to allow this as it does on other Android phones?
Wilcone said:
Had bluetooth settings vanish from my Subaru using lg g2x, but a bit of the history on this might add something to this discussion.
My G2x would not connect with the Subaru. Unlike another android phone the salesman had, no keyboard screen popped up so that the 1234 code could be entered. Called LG, TMobile, no help at all. LG rep was particularly hostile about this, not even seeming to understand/care about what I was explaining. Contacted Subaru corporate who suggested that the G2x had a preset 0000 code that could not be changed, so I needed to change the code on the Subaru bluetooth with another android phone, as described on the last few pages of the bluetooth section of the Subaru manual. So, paired another Android phone using 1234, unpaired that phone, and reset code to 0000 with that phone. G2x now paired rather easily.
Then, phone wouldn't even recognize Subaru bluetooth; 2 days later, spontaneously returned. Several weeks later, again vanished and wouldn't come back. Paired another phone, deleted my phone, repaired my phone, ok for now. The code remained 0000 throughout the process.
Next time this happens, I will delete my phone from the Subaru and go through the pairing process again to see what happens.
I will try the reboot the next time this returns. I appreciate this potential fix. Will alos try the repair program. My phone is not rooted.
In the meantime, can anyone tell me if a Gingerbread install will allow a keyboard to pop up so that different devices using 1234 or 0000 can be paired, and if the phone can handle pairings with 2 or more devices having different codes? Why doesn't a keyboard pop-up to allow this as it does on other Android phones?
Click to expand...
Click to collapse
The LG Gingerbread release did nothing to the bluetooth drivers that are in the Froyo release. Whatever you get on Froyo (including frequent disconnects) will remain in Gingerbread.
I do not have a Subaru, but with my Land Rover if I try to pair the G2x with the car by having the phone discover the car, I do not get a keyboard popup on the phone.
However, if I have the car discover the phone the car gives me the code to enter and the G2x will give me a popup screen on which to enter the code.
The above has been my experience with using either froyo roms or gb roms.
Reconnecting Subaru bluetooth
Previously described my problems and fix for Subaru bluetooth and G2x. Attempts to fix latest disconnect included hard reboot which did not work.
So, I deleted my phone and reconnected like it was a new phone.
I discovered that the keyboard for entry of the 0000 password I had previously changed my Subaru to now popped up for the first time and I entered 0000. I was told by a bluetooth "pro" that there are two distinct conditions 1) pairing the phone to the car and 2) pairing the car to the phone. When the phone pairs to the car, the android password keyboard pops up. When the car is paired to the phone, it doesn't and it apparently assumes the default passwords are the same; if they aren't, no pairing.
This seems correct to me because of the many reports/complaints I've read about the password keyboard not showing up and its sudden appearance on mine. I guess if you can get the sequence right for pairing the phone to the car (rather than pairing the car to the phone) the android password keyboard will pop up and a 1234 password could be successfully used for vehicles that seem unable to connect because of G2x's default 0000 password.
Useful info for some?
I searched but found nothing in relation exactly. So this is kindof weird, thats why I'm posting. I searched through google, LG forums, jawbone forums and t-mobile forums, nothing exactly in relation (especially dealing with multiple ROM's) or any type of fix to a related issue.
So, I have a jawbone 2 headset device. Stock before I did anything, it paired. Diddnt use it for a while their, and then stared flashing some ROM's. I mainly used cm7 based rom's and paired my headset just fine, very easily actually and fast. I'm having proximity sensor issues, so I had to revert back to a froyo build (EB right now) but the same goes for ultimate rom.
Every time I try and connect initially, i get a force close on the settings. (when jawbone is in pairing mode) Then its in the list of bt connections of course, and i try and re-connect it and it spits out: Their was a problem pairing with Jawbone because the PIN or Passkey is incorrect. Now I havnt been able to find out how to either change the key or the pass. The key is the default 0000, I have even reset the jawbone to when I turn it on, its in auto pair mode. I have done hard-reboots, battery out's almost everything I can think of
So I'm stuck, any information would be completely awesome, and I hope its not super easy... Well I do, but it will not credit my intelligence.
bmann_420 said:
Every time I try and connect initially, i get a force close on the settings. (when jawbone is in pairing mode) Then its in the list of bt connections of course, and i try and re-connect it and it spits out: Their was a problem pairing with Jawbone because the PIN or Passkey is incorrect. Now I havnt been able to find out how to either change the key or the pass. The key is the default 0000, I have even reset the jawbone to when I turn it on, its in auto pair mode. I have done hard-reboots, battery out's almost everything I can think of
So I'm stuck, any information would be completely awesome, and I hope its not super easy... Well I do, but it will not credit my intelligence.
Click to expand...
Click to collapse
There's no answer in this old thread but I am having the exact same issue. It's happening on 2 different phones with different ROMs (Bionix and Weapon). I had the issue before on Weapon 2.8 so I downgraded to 2.7 and it was working. I then when reset my headset to connect it to the other phone, and it's giving me the problem again. Has anyone solved this? I am using a Blu Ant Q2, is that a bad device for this phone? Thanks.
Pairing SGS3 to Jawbone
So frustrating. Hours spent on this. Have 2 Jawbone II s and neither will pair with Samsung Gal S3. Soooooo frustrating. No answers on web to date. Have tried reset of Jawbone. Tried holding TALK button. Tried pairing in every way. No success. Sgs3 does detect many things but not Jawbone. Please answer. [email protected]. Thankyou out loud!!!!!!
Hi all,
We have a number of Samsung Galaxy S2 devices (i9100p with built in nfc), and a number of bluetooth RFID scanners.
I am trying to simplify the pairing of the bluetooth scanners. My idea is to use an NFC tag on the back of each scanner, which the user can tap their phone against, and enter the passcode presented on the phone in to the scanner to pair (as per the normal bluetooth pairing).
I have tried a few applications including BT Tag writer and TagWriter, but cannot seem to get either working consistently, on all devices. (I have installed the app on each device, but it only seems to work on the phone that wrote the tag although all phones have the software installed). In the case of BT Tag Writer, the application launches but it is unable to connect to the device.
However, on my note 2 running 4.1.2, it seems to be working fine. I seem to remember seeing something that jellybean introduces extra api's for bluetooth pairing via nfc? Is there a work around for 4.0.4?
Thanks
edit
Ahh just seen on BT Tag Writer that it only supports A2DP devices. The reader we have connects as a HID / keyboard.
Hey all,
I recently installed RR on my OPO because it looks awesome and because I was hoping it would fix some bluetooth issues i've been having with the phone. It is awesome, but unfortunately didn't fix my bluetooth-aches.
I was reading somewhere that it is possible to "change the bluetooth radio" (???). I think it means install new drivers? Anyways, does anyone know of a way I can try out a completely different bluetooth driver (stack?, radio?, software?, etc...).
The symptoms are:
Pairing to certain devices is a nightmare, it takes upwards of 20 tries and even then sometimes it doesnt work. When it does, it stays paired and connects most of the time automatically.
I have a Garmin D2 that simply won't pair with the phone. Using the garmin app, the phone complains about the key being incorrect (the 6 digit bluetooth key) but it is...
Anyways, if someone can point me in the direction of a bluetooth radio that is compatible with RR, i'd appreciate it.