Android :: Data Transmisison Error Using SPP Over Bluetooth?
Aug 18, 2010
I've been having an issue with data integrity using an RFCOMM socket over Bluetooth in Android. I don't have any issues connecting, but the data I receive is garbled and not the same as the data that is sent. The data is sent by an RS232 device over a Bluetooth adapter, which the phone connects to. There isn't a problem with the adapter as the data is properly received if I connect with a laptop.
My Bluetooth connection is handled based off of the BluetoothChat sample application found at the Android developer site(http://developer.android.com/resources/samples/BluetoothChat/index.html), with no changes. The data being sent is plain text and control characters (which are stripped out before display to the user). The specific problem I have is that some of the text is missing, some of it is repeated, etc. The funny thing is if I connect to a computer with a terminal app and type in there, the data is transmitted fine. Additionally, if I connect to the device using the GetBlue app [url] the data is received fine.
So I guess the issue is what does GetBlue possibly do different to handle it's Bluetooth data transfer, or is there another way receive Bluetooth data over an RFCOMM socket on Android?
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May 7, 2010
I'm having some problems with an error message I'm getting from the Facebook application that came with the phone. The message im getting is "an error has occurred while fetching data [malformedJSon]". This is when I go to new feeds. Anyone else having this issue or know how to resolve it?
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Jul 18, 2010
My google navigation will "skip" when I use it with my car stereo's bluetooth. The first second of every turn-by-turn direction, is missing. Any ideas on with the problem might be? I have an HTC EVO and my car stereo is the Dual XHD7714. When I use Pandora with bluetooth, everything is perfect, no skipping; even google navigation works great too when it is running with Pandora. However, when i run google navigation by itself with bluetooth, the first second is missing. Thank you in advanced and sorry if this question has already been answered. I tried to search for it but could not find any mention of it.
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Dec 29, 2009
I am trying to get my Activity to enable Bluetooth with the Android 2.0.1 SDK, I am using some code straight from the documentation here: http://developer.android.com/guide/topics/wireless/bluetooth.html
Which is code...
I get an error at the REQUEST_ENABLE_BT part where Eclipse says it cannot be resolved. What am I doing wrong?
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Jul 19, 2010
ive got a nokia blue tooth kit in my car and my desire is paired with it. it works thru the car speakers for voice calls but nothing else (lots of echo tho) but my old phone used to give navigation over the speakers too. it would even interupt my in car cd player to give directions then continue playing cd audio. any idea ? looked in my phone settings but cant see anything
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Mar 3, 2010
I recently got a htc hero and I am very impressed with the phone and the os as a whole but I am having one small issue. I have a pair of bluetooth headphones and when I go to pair them I get an error that says "There was a problem connecting to NS-BTHDP." (ns-bthdp == headphone name). The weird thing is, the phone says its connect to phone audio, even though I never entered in the passcode. So I go and try to listen to music/podcasts and it plays through the speak phone.. but if I go to make a phone call it goes through the headset.I have no idea what the problem is, as these worked fine on my old gen2 ipod touch.Does the hero have limited bluetooth connectivity, or are the headphones not compatible? I would like to know more about the error, does android os have an error log that I can look at? Any advice would be greatly appreciated.
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Sep 12, 2009
I'm using Modaco 2.0 and I used EncoderHD to encode some videos to watch on the bus to work.The conversion went great and a quick glance before I took off this morning showed a wonderful, smooth playback with no issues whatsoever.On the bus, I get as comfortable as one could get on a bus, flick on the Hero, start the "Album" and select my video... only to experience about 2-3 seconds of Audio/Video sync issues.what?It didn't take much testing to figure out that everything works great with the speakers and wired headsets but when I connect my bluetooth stereo headset (I have the Samsung WEP870 and the SE HBH-IS800) the sync issues start.Has anyone else experienced this or similair issues? Is there a solution? If not, do we think it's a solvable issue ( I don't have this issue on my Touch HD, but then again, the playback is far from being as smooth)
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Nov 18, 2013
my device is rebranded chinese made phone running 4.1.2 Andromax ULE
and it has been rooted and installed with CWM, last time i know, there was no problem with bluetooth...
so for past 5 days i was searching any possible way to fix bluetooth problem not turning on, but with no luck...what i have done, are...
- reboot [not working]
- factory reset [not working]
- flash other custom rom via cwm [still getting bluetooth not turning on]
- flash stock rom via stock recovery
- flash a raw image [download mode] with HDD RAW COPY then change the correct imei and meid [still the same problem]
after all the above step....only BLUETOOTH not working...here is a log :
Quote:
build.board: 7x27
build.bootloader: unknown
build.brand: Smartfren[code].....
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Jun 28, 2010
From different post i have concluded that insertion, deletion and updation in Calendar is only possible by using g-data.
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Dec 30, 2009
I want to implement an application which can successfully transfer a file from my android eclair device to any other bluetooth device.Please if anybody know the solutions, kindly help me out, mail me at narendraprabh...@gmail.com or post back here please...
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Apr 28, 2010
I'm very new to the Android platform, but i was hoping to write a quick and neat little android app which will receive data from blue tooth and to graph the data. I'm trying to use a LM Technologies LM049 blue tooth adapter to send serial data to my HTC Dersire 2.1 android handset. At the moment i'm trying to just prove i can send ascii characters to the phone. Not quite sure where to begin.
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Oct 12, 2010
If I run my php file manually I am getting the output as follows:
CODE:.....
The php code is as follows:
CODE:...................
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Nov 1, 2010
Iam implementing java code for MYGlucoHealth monitor. I have to catch the bluetooth data through my application and parse it to the readable format. (later i store that in SQLite database). But according to the protocol specification they provided, i cant understand how to read and parse it. i know how to pair the device with my application.But i don't know how to parse the data bytes as per the device specification protocol.Can anyone tell me how to do that. Anybody done with this kind of coding?
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Nov 2, 2010
I am trying to use OData4J to retrieve a list of Users from the StackOverflow OData service (onto an Android 2.1 device), but it isn't working.
public static Enumerable<OEntity> getUserInfo() {
ODataConsumer c = ODataConsumer.create("https://odata.sqlazurelabs.com/OData.svc/v0.1/rp1uiewita/StackOverflow/");
return c.getEntities("Users").execute();
I think it is unable to retrieve data from the URL. Any ideas why this would be? Is there anything wrong with my code?
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Aug 3, 2010
CODE:................
Where would i declare my {KEY_ARRIVAL} as i already have my KEY_ARRIVAL declared in my DBAdapter.java. But there is an error stating KEY_ARRIVAL cannot be resolved?
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Jan 20, 2010
I am trying to save battery and speed up my phone. I know that I can in to setting to disable all these extra features, but I heard from someone that, "even though you disabled it, the phone will still continue to try to pick up these services, like 3G). Is there a app that will fully disable these features?
Also is there anyway up speeding up my phone. I have a Rooted T-Mobile MyTouch 3G w/ the CyanogenMod 4.2.13. I heard that there is a "10MB Hack", but I also heard that it will slow down your games.
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Aug 20, 2013
I am trying to write a client application which talk to server application via bluetooth. Server application is running on embedded platfrom.
I referred bluetoothchat example for bluetooth data transfer. In my application I have two activities, Main activity shows list of bluetooth devices and when a user clicks on one of the devices it will open a new activity. Then it will open a bluetooth socket start thread to connect to server. I have a message handler which talks to the connected thread.
my codes looks like this
[HIGH]
public class ConnectActivity extends Activity {
// Unique UUID for this application
public static final UUID MY_UUID_INSECURE =
[Code]....
Some times my UI hangs when I click a button, it takes ages to respond back. In my method for ledOn I call bluetooth input stream. Is this correct method to do it.
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Oct 2, 2010
I am working on an SMS Sending application and for login purpose i want to send the username and password using POST method from my Android Application to the web server.When i click on login button the application is not resopnding and the console prints the following message in response of the Post request.
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Oct 12, 2010
I have a rooted Evo, running warm's tpt rom. Juice Defender was working fine for me until last night. I noticed it wasnt in the notification bar. (I do not have any task killers)
I am getting the following erros when I set it up:
mobile data control doesnt work
mobile data control (apn method) doesnt work
The log shows:
apn not found
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Jul 20, 2010
I am trying to do what I think is a fairly simple task to authenticate a user on my server. I am using AsyncTask as a private subclass of my Activity, however when I try to populate the user object after authenticating it keeps setting it to null. Is there something strange in how the onPostExecute() method is called that is causing this? I originally had the AsyncTask as its own class but ran into the same problem, so I am try to solve this using a private subclass.
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Jun 23, 2010
I rooted and flashed the latest Fresh ROM last night. Everything worked fantastic until about an hour ago I started getting this error: Data Call Failure Error Code 67 .Registration failure. Your PCS Vision username and/or password may be incorrect. Please try again.
I saw some other threads upon googling but they were for other devices and I'm a bit nervous that I'll screw things up.
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Mar 13, 2013
I'm developing an application which will print to a blue tooth printer the data that iv'e gathered but i don't know where to start. I'm done with the application that will gather the data. But i'm on a deadlock now. How do i design the file that the printer will print?.
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Sep 22, 2011
I have an application that receives data in binary form through bluetooth. I read the data using bluetoothsocket to an byte[]. But i must parse all messages, because they must have an given format and they are in binary.
My solution was to convert byte[] to a string and then split the string and parse all received messages.
An example of the data to parse:
0000000010000001
I should know that the first 8 zeros are the header and 10000001 the real data.
My idea was to create a string that represents -> 0000000010000001 and then split the whole string in one byte and check the value, like:
string1 had 00000000
string2 had 10000001
I know that 8 zeros are the header, therefore string2 has the representation of the data.
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Jul 13, 2010
I returned my perfect working non-defective EVO last week because my friend has a better deal for the monthly cost. So I joined his family plan and returned mine.
Unfortunately, my new EVO are having some problems. My new one has mild light leakage below the menu button. The volume control button is a bit loose, its workable, but just not as sturdy as on my previous EVO. Occasionally it has text messages delay, which never occur on my previous EVO, Im not sure if its related to Sprint or the phone itself. The battery is not as good as the previous one. Even though I can definitely get through the day with 15 hours for each charge, but I got 20+ hours on my previous EVO. Maybe itll get better once I charged it a few more cycle, its not the biggest concern for me. My biggest concern is actually my own stupid mistake! When I was altering the settings for my phone, I accidentally press and tried to active the Hotspot option. From there one, Ive been receiving the Data Call Failure Error 67 message randomly. Sometimes I just dismiss the message and its fine, sometimes I cant use the 3G after dismissing it. Ive tried to update the profile; turn off the phone; pull the battery. Sometimes it works, sometimes dont..
I don't need the hotspot function and didnt sign up and pay the $30 for it. I really dont need it, I just press it by accident ONCE! Is there any cure with this? I dont want to receive the error message randomly. And I don't want the hotsopt feature! I dont want to call Sprint yet before any other possible remedy, its kind of my last resort. Ive read from some other places that they just tell you to do a hard/soft reset and it is not a guarantee that itll work.
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Jul 7, 2010
Just taken delivery of a UK edition Samsung Galaxy S. Connecting it to my car audio via bluetooth no problems but it drops the 3G/H network connection as soon as it connects to the car. Disconnect the Bluetooth and I get the data connection back. Is this deliberate or a bug? It means I can't receive emails etc whilst in my car unless I turn off Bluetooth.
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Sep 2, 2010
The Facebook app on my Desire doesn't seem to be working. A couple of days ago I couldn't refresh the "Notifications" page, it gave me a brief message about an error. Now I'm getting the same message on the News Feed page
"An error had occurred while fetching data. [101/Invalid API Key]". I'm on T-Mobile, if that helps.
Anyone else having this issue or any advice?
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Aug 24, 2010
My Evo has no data connection all of a sudden and pops up with an error that says, "Data Call Failure Error Code 130. Network error. Sign in failed. Please wait a moment and try again, you may need to contact Sprint."
I didn't do anything weird to my phone or anything to have this happen all of a sudden. I've tried doing a battery pull several times and tried updating my profile, but nothing seems to work. Anyone have any suggestions? Anyone else experiencing such an error?
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Jun 10, 2012
Ok so I have a Galaxy 10.1 wifi tablet. I have it rooted with the AOKP ICS release, and my tab is encrypted. What happened is my little brother was messing around with my tablet and it has a PIN code lock screen, he botched the code too many times and now my tablet is trying to do a data wipe.
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Jul 12, 2012
I've installed several games that need to download aditional game data, but so far I couldn't manage to download anything. For some reasons, the download never starts and it gives an error. I tried using logcat to see if there are any errors but I couldn't find a clue.
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Nov 13, 2010
Yahoo Connection Error, Facebook connection error, gmail connection error. All of a sudden I am not getting any data to my phone. Only over WiFi is it working. What is going on?
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