I am writing a web app for the Gear S3 and a companion Win-App for UWP in C#.
What I want it to do: S3 acting as a BT server, sending data, and the Win-App as a client, which is supposed to receive the data.
In Tizen I used the registerRfcommServiceByUUID() function as below:
function publishTransferService() {
if(remoteDevice.isConnented){
console.log("Connection Status: " + remoteDevice.isConnected);
var TRANS_SERVICE_UUID = '5BCE9431-6C75-32AB-AFE0-2EC108A30860';
adapter.registerRFCOMMServiceByUUID(TRANS_SERVICE_UUID, 'My Service', ServiceSuccessCb,
function(e) {
console.log( "Could not register service record, Error: " + e.message);
});
}else{
console.error("Connection Status: " + remoteDevice.isConnected);
}
In C# i try to connect to the service as follows:
//to ulong converted MAC-Address of the Gear
ulong gearBtAddress = 145914022804881;
//create device-instance of the gear
BluetoothDevice gearDevice = await BluetoothDevice.FromBluetoothAddressAsync(gearBtAddress);
//list the services found on the gear and connect to the one with
//the same uuid as in tizen
var gearServices = await gearDevice.GetRfcommServicesAsync();
foreach (var service in gearServices.Services)
{
if(service.ServiceId == RfcommServiceId.FromUuid(Guid.Parse("5BCE9431-6C75-32AB-AFE0-2EC108A30860")))
{
_service = await RfcommDeviceService.FromIdAsync(service.ToString());
}
}
The Problem I am facing is, that the C# won't find the wanted Uuid, although it finds several other uuids. I don't see where it gets lost?
Thanks in advance.
I solved it myself, the problem was, that the UUID was uncached. Adding the following was all to do:
var cacheMode = BluetoothCacheMode.Uncached;
var gearServices = await gearDevice.GetRfcommServicesAsync(cacheMode);
Related
Specs
Unity editor version: 2018.2.8f1
Firebase Unity SDK version: 5.5.0
Additional SDKs: SimpleFirebaseUnity
Developing on: Mac
Export Platform: Android
Issue
I'm having troubles setting up a system to download pictures from storage. I'm not an expert in databases, but I wanted to give it try, just to learn how it is done.
I found Firebase very useful to store metadata on the real-time database and easy to approach even for an entry level programmer like me.
The problem is that I'm trying to download a .png file from a folder in storage, but I can't manage to find if the file is actually downloaded or if it's just lost in the process. I don't get any errors in the console, but when I open the folder in which the files should be, it's empty.
Code
private SimpleFirebaseUnity.Firebase firebaseDatabase;
private FirebaseQueue firebaseQueue;
private FirebaseStorage firebaseStorage;
private StorageReference m_storage_ref;
// Setup refernece to database and storage
void SetupReferences()
{
// Get a reference to the database service, using SimpleFirebase plugin
firebaseDatabase = SimpleFirebaseUnity.Firebase.CreateNew(FIREBASE_LINK, FIREBASE_SECRET);
// Get a reference to the storage service, using the default Firebase App
firebaseStorage = FirebaseStorage.DefaultInstance;
// Create a storage reference from our storage service
m_storage_ref = firebaseStorage.GetReferenceFromUrl(STORAGE_LINK);
// Create a queue, using SimpleFirebase
firebaseQueue = new FirebaseQueue(true, 3, 1f);
}
// ...
IEnumerator DownloadImage(string address, string fileName)
{
var local_path = Application.persistentDataPath + THUMBNAILS_PATH;
var content_ref = m_storage_ref.Child(THUMBNAILS_PATH + fileName + ".png");
content_ref.GetFileAsync(local_path).ContinueWith(task => {
if (!task.IsFaulted && !task.IsCanceled)
{
Debug.Log("File downloaded.");
}
});
yield return null;
}
There can be many reason for why this is not working for you including:
security rules are not setup properly
paths to files are not correct
you are testing it on wrong platform (Firebase is not working well in the editor)
your device is blocking the connection
etc...
In order to get error messages you need to log them:
IEnumerator DownloadImage(string address, string fileName)
{
var local_path = Application.persistentDataPath + THUMBNAILS_PATH;
var content_ref = m_storage_ref.Child(THUMBNAILS_PATH + fileName + ".png");
content_ref.GetFileAsync(local_path).ContinueWith(task => {
if (!task.IsFaulted && !task.IsCanceled)
{
Debug.Log("File downloaded.");
}
else
{
Debug.Log(task.Exception.ToString());
}
});
yield return null;
}
Keep in mind testing it in the editor may not work.
I am trying to connect to a MS SQL database through Unity. However, when I try to open a connection, I get an IOException: Connection lost.
I have imported System.Data.dll from Unity\Editor\Data\Mono\lib\mono\2.0. I am using the following code:
using UnityEngine;
using System.Collections;
using System.Data.Sql;
using System.Data.SqlClient;
public class SQL_Controller : MonoBehaviour {
string conString = "Server=myaddress.com,port;" +
"Database=databasename;" +
"User ID=username;" +
"Password=password;";
public string GetStringFromSQL()
{
LoadConfig();
string result = "";
SqlConnection connection = new SqlConnection(conString);
connection.Open();
Debug.Log(connection.State);
SqlCommand Command = connection.CreateCommand();
Command.CommandText = "select * from Artykuly2";
SqlDataReader ThisReader = Command.ExecuteReader();
while (ThisReader.Read())
{
result = ThisReader.GetString(0);
}
ThisReader.Close();
connection.Close();
return result;
}
}
This is the error I get:
IOException: Connection lost
Mono.Data.Tds.Protocol.TdsComm.GetPhysicalPacketHeader ()
Mono.Data.Tds.Protocol.TdsComm.GetPhysicalPacket ()
Mono.Data.Tds.Protocol.TdsComm.GetByte ()
Mono.Data.Tds.Protocol.Tds.ProcessSubPacket ()
Mono.Data.Tds.Protocol.Tds.NextResult ()
Mono.Data.Tds.Protocol.Tds.SkipToEnd ()
Rethrow as TdsInternalException: Server closed the connection.
Mono.Data.Tds.Protocol.Tds.SkipToEnd ()
Mono.Data.Tds.Protocol.Tds70.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters)
Mono.Data.Tds.Protocol.Tds80.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters)
Please disregard any security risks with this approach, I NEED to do this for testing, security will come later.
Thank you for your time.
Please disregard any security risks with this approach
Do not do it like this. It doesn't matter if security will come before or after. You will end of re-writing the whole code because the password is hard-coded in your application which can be decompiled and retrieved easily. Do the connection the correct way now so that you won't have to re-write the whole application.
Run your database command on your server with php, perl or whatever language you are comfortable with but this should be done on the server.
From Unity, use the WWW or UnityWebRequest class to communicate with that script and then, you will be able to send and receive information from Unity to the server. There are many examples out there. Even with this, you still need to implement your own security but this is much more better than what you have now.
You can also receive data multiple with json.
Below is a complete example from this Unity wiki. It shows how to interact with a database in Unity using php on the server side and Unity + C# on the client side.
Server Side:
Add score with PDO:
<?php
// Configuration
$hostname = 'localhot';
$username = 'yourusername';
$password = 'yourpassword';
$database = 'yourdatabase';
$secretKey = "mySecretKey"; // Change this value to match the value stored in the client javascript below
try {
$dbh = new PDO('mysql:host='. $hostname .';dbname='. $database, $username, $password);
} catch(PDOException $e) {
echo '<h1>An error has ocurred.</h1><pre>', $e->getMessage() ,'</pre>';
}
$realHash = md5($_GET['name'] . $_GET['score'] . $secretKey);
if($realHash == $hash) {
$sth = $dbh->prepare('INSERT INTO scores VALUES (null, :name, :score)');
try {
$sth->execute($_GET);
} catch(Exception $e) {
echo '<h1>An error has ocurred.</h1><pre>', $e->getMessage() ,'</pre>';
}
}
?>
Retrieve score with PDO:
<?php
// Configuration
$hostname = 'localhost';
$username = 'yourusername';
$password = 'yourpassword';
$database = 'yourdatabase';
try {
$dbh = new PDO('mysql:host='. $hostname .';dbname='. $database, $username, $password);
} catch(PDOException $e) {
echo '<h1>An error has occurred.</h1><pre>', $e->getMessage() ,'</pre>';
}
$sth = $dbh->query('SELECT * FROM scores ORDER BY score DESC LIMIT 5');
$sth->setFetchMode(PDO::FETCH_ASSOC);
$result = $sth->fetchAll();
if(count($result) > 0) {
foreach($result as $r) {
echo $r['name'], "\t", $r['score'], "\n";
}
}
?>
Enable cross domain policy on the server:
This file should be named "crossdomain.xml" and placed in the root of your web server. Unity requires that websites you want to access via a WWW Request have a cross domain policy.
<?xml version="1.0"?>
<cross-domain-policy>
<allow-access-from domain="*"/>
</cross-domain-policy>
Client/Unity Side:
The client code from Unity connects to the server, interacts with PDO and adds or retrieves score depending on which function is called. This client code is slightly modified to compile with the latest Unity version.
private string secretKey = "mySecretKey"; // Edit this value and make sure it's the same as the one stored on the server
public string addScoreURL = "http://localhost/unity_test/addscore.php?"; //be sure to add a ? to your url
public string highscoreURL = "http://localhost/unity_test/display.php";
//Text to display the result on
public Text statusText;
void Start()
{
StartCoroutine(GetScores());
}
// remember to use StartCoroutine when calling this function!
IEnumerator PostScores(string name, int score)
{
//This connects to a server side php script that will add the name and score to a MySQL DB.
// Supply it with a string representing the players name and the players score.
string hash = Md5Sum(name + score + secretKey);
string post_url = addScoreURL + "name=" + WWW.EscapeURL(name) + "&score=" + score + "&hash=" + hash;
// Post the URL to the site and create a download object to get the result.
WWW hs_post = new WWW(post_url);
yield return hs_post; // Wait until the download is done
if (hs_post.error != null)
{
print("There was an error posting the high score: " + hs_post.error);
}
}
// Get the scores from the MySQL DB to display in a GUIText.
// remember to use StartCoroutine when calling this function!
IEnumerator GetScores()
{
statusText.text = "Loading Scores";
WWW hs_get = new WWW(highscoreURL);
yield return hs_get;
if (hs_get.error != null)
{
print("There was an error getting the high score: " + hs_get.error);
}
else
{
statusText.text = hs_get.text; // this is a GUIText that will display the scores in game.
}
}
public string Md5Sum(string strToEncrypt)
{
System.Text.UTF8Encoding ue = new System.Text.UTF8Encoding();
byte[] bytes = ue.GetBytes(strToEncrypt);
// encrypt bytes
System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] hashBytes = md5.ComputeHash(bytes);
// Convert the encrypted bytes back to a string (base 16)
string hashString = "";
for (int i = 0; i < hashBytes.Length; i++)
{
hashString += System.Convert.ToString(hashBytes[i], 16).PadLeft(2, '0');
}
return hashString.PadLeft(32, '0');
}
This is just an example on how to properly do this. If you need to implement session feature and care about security, look into the OAuth 2.0 protocol. There should be existing libraries that will help get started with the OAuth protocol.
An alternative would be to create your own dedicated server in a command prompt to do your communication and connecting it to unity to Handel multiplayer and SQL communication. This way you can stick with it all being created in one language. But a pretty steep learning curve.
Unity is game engine.
so That's right what the answer says.
but, Some domains need to connect database directly.
You shouldn't do that access database directly in game domain.
Anyway, The problem is caused by NON-ENGLISH computer name.
I faced sort of following errors at before project.
IOException: Connection lost
Mono.Data.Tds.Protocol.TdsComm.GetPhysicalPacketHeader ()
Mono.Data.Tds.Protocol.TdsComm.GetPhysicalPacket ()
Mono.Data.Tds.Protocol.TdsComm.GetByte ()
Mono.Data.Tds.Protocol.Tds.ProcessSubPacket ()
Mono.Data.Tds.Protocol.Tds.NextResult ()
Mono.Data.Tds.Protocol.Tds.SkipToEnd ()
Rethrow as TdsInternalException: Server closed the connection.
Mono.Data.Tds.Protocol.Tds.SkipToEnd ()
Mono.Data.Tds.Protocol.Tds70.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters)
Mono.Data.Tds.Protocol.Tds80.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters)
And after changing computer name as ENGLISH, It works.
I don't know how it's going. But It works.
Mono's System.Data.dll has some issues in P.C has NON-ENGLISH Computer name.
So, at least Unity project.
You should tell your customer Do not set their computer name as NON-ENGLISH.
I don't know people in mono knows these issue or not.
---------- It's OK in after 2018 version ----------
Api Compatibility Level > .Net 4.x
You can connect database in Non-english computer name machine.
//If the user uploaded an image, read it, and send it to the Vision API
if (activity.Attachments.Any() && activity.Attachments.First().ContentType.Contains("image"))
{
//stores image url (parsed from attachment or mess`enter code here`age)
string uploadedImageUrl = activity.Attachments.First().ContentUrl; ;
uploadedImageUrl = HttpUtility.UrlDecode(uploadedImageUrl.Substring(uploadedImageUrl.IndexOf("file=") + 5));
using (Stream imageFileStream = File.OpenRead(uploadedImageUrl))
{
try
{
analysisResult = await visionClient.AnalyzeImageAsync(imageFileStream, visualFeatures);
}
catch (Exception e)
{
analysisResult = null; //on error, reset analysis result to null
}
}
}
//Else, if the user did not upload an image, determine if the message contains a url, and send it to the Vision API
else
{
try
{
analysisResult = await visionClient.AnalyzeImageAsync(activity.Text, visualFeatures);
}
catch (Exception e)
{
analysisResult = null; //on error, reset analysis result to null
}
}
I am trying the code above. I got the code from here: https://docs.botframework.com/en-us/bot-intelligence/vision/#example-vision-bot.
As is, the code does what it can do when ran locally, but reading the image's URL from an uploaded file doesn't work after I published my bot to Azure and ran it from there.
I attempted to debug by attaching Visual Studio directly to my published webapp bot in Azure. It looked like the webapp is unable read the stored image's URL from the Azure server temp storage location or can't access the temp storage location.
This line:
uploadedImageUrl = HttpUtility.UrlDecode(uploadedImageUrl.Substring(uploadedImageUrl.IndexOf("file=") + 5));
Shows this value:
"https://bcattachmentsprod.blob.core.windows.net/at4984/Gv4cOx6OdSl- original"
Then, this line:
using (Stream imageFileStream = File.OpenRead(uploadedImageUrl))
Changes the value to:
"s://bcattachmentsprod.blob.core.windows.net/at4984/Gv4cOx6OdSl-original"
And then it just stops.
Has anyone ran into an issue like this? How do I go about solving this issue?
Thanks!
If you have a image URL, you should simply call AnalyzeImageAsync with that URL instead of creating a stream as you have. The File class should be used for files on your local drive/network. By creating a stream, you download the image once to your VM, then upload it to the vision service, doubling the work.
I previously made a post asking how to send a .3gpp audio file up to the parse cloud here:
Xamarin C# Android - converting .3gpp audio to bytes & sending to parseObject
I have managed to do this successfully, on parse's data manager, I can click the file's link and play the sound sent from my android device successfully.
Here's the code for uploading the data to the cloud:
async Task sendToCloud(string filename)
{
ParseClient.Initialize ("Censored Key", "Censored Key");
string LoadPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ApplicationData);
string savetheFile = sName + ".3gpp";
string tempUserName;
LoadPath += savetheFile;
Console.WriteLine ("loadPath: " + LoadPath);
try
{
byte[] data = File.ReadAllBytes(LoadPath);
ParseFile file = new ParseFile(savetheFile, data);
await file.SaveAsync();
var auidoParseObject = new ParseObject("AudioWithData");
//Console.WriteLine(ParseUser.getUserName());
if (ParseUser.CurrentUser != null)
{
tempUserName = ParseUser.CurrentUser.Username.ToString();
}
else{
tempUserName = "Anonymous";
}
//tempUserName = ParseUser.CurrentUser.Username.ToString();
Console.WriteLine("PARSE USERNAME: " + tempUserName);
auidoParseObject["userName"] = tempUserName;
auidoParseObject["userName"] = tempUserName;
auidoParseObject["file"] = file;
await auidoParseObject.SaveAsync();
}
catch (Exception e)
{
Console.WriteLine("Failed to await audio object! {0}" + e);
}
}
So as you can see, I'm sending a ParseObject called "AudioWithData".
This object contains two children:
-The username of the user who uploaded the file (string)
-The parseFile called "file" (which has the following two children)
---SaveTheFile (A string containing the name of the audio file, input by the user, with the .3gpp extension added on the end, for example "myAudioFile.3gpp"
---data (this contains the bytes of the audio file)
I need to be able to download the file onto my android device, and play it through a mediaplayer object.
I've checked over the documentation on the parse website, but I haven't managed to do this:
(excuse my pseudo querying syntax here)
SELECT (audio files) FROM (the parseObject) WHERE (the username = current user)
I then, eventually, want to place all of these files into a listview, and when the user clicks the file, it plays the audio.
I've tried the following but I don't really know what I'm doing with it...
async Task RetrieveSound(string filename)
{
ParseClient.Initialize ("Censored key", "Censored key");
Console.WriteLine ("Hit RetrieveSound, filename = " + filename);
string username;
var auidoParseObject = new ParseObject("AudioWithData");
if (ParseUser.CurrentUser != null) {
username = ParseUser.CurrentUser.Username.ToString ();
} else {
username = "Anonymous";
}
string cloudFileName;
Console.WriteLine ("username set to: " + username);
var HoldThefile = auidoParseObject.Get<ParseFile>("audio");
//fgher
var query = from audioParseObject in ParseObject.GetQuery("userName")
where audioParseObject.Get<String>("userName") == username
select file;
IEnumerable<ParseFile> results = await query.FindAsync();
Console.WriteLine ("passed the query");
//wfojh
byte[] data = await new HttpClient().GetByteArrayAsync(results.Url);
Console.WriteLine ("putting in player...");
_player.SetDataSourceAsync (data);
_player.Prepare;
_player.Start ();
}
Any help would be GREATLY APPRECIATED! Even a point in the right direction would be great!
Thanks!
EDIT--
I'm actually getting a query error on the following lines
(I can't post images because of my reputation - I lost access to my main stackOverflow account :/ )
Links to images here:
first error: http://i.stack.imgur.com/PZBJr.png
second error: http://i.stack.imgur.com/UkHvX.png
Any ideas? The parse documentation is vague about this.
this line will return a collection of results
IEnumerable<ParseFile> results = await query.FindAsync();
you either need to iterate through them with foreach, or just pick the first one
// for testing, just pick the first one
if (results.Count > 0) {
var result = results[0];
byte[] data = await new HttpClient().GetByteArrayAsync(result.Url);
File.WriteAllBytes(some_path_to_a_temp_file, data);
// at this point, you can just initialize your player with the audio file path and play as normal
}
I'm trying to connect to a BlueTooth device
I have paired it and when I search for it I find it :
private async void Grid_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
{
ListBox1.Items.Clear();
var devices = await DeviceInformation.FindAllAsync(RfcommDeviceService.GetDeviceSelector(RfcommServiceId.SerialPort));
var device = devices.FirstOrDefault(c => c.Name.Contains("BMMTCA32"));
foreach (var element in device.Properties)
{
var strMessage = element.Key + (element.Value == null ? "" : " = " + element.Value.ToString());
ListBox1.Items.Add(strMessage);
}
}
Here is the output in my ListBox:
System.ItemNameDisplay = BMMTCA32-01
System.Devices.DeviceInstanceId = BTHENUM\{00001101-0000-1000-8000-00805f9b34fb}_LOCALMFG&0048\8&f358302&0&0012F31DECF3_C00000000
System.Devices.Icon = C:\Windows\System32\DDORes.dll,-2001
{51236583-0C4A-4FE8-B81F-166AEC13F510} 123 = C:\Windows\SYSTEM32\DDORes.dll,-3001
System.Devices.InterfaceEnabled = True
System.Devices.IsDefault = False
System.Devices.PhysicalDeviceLocation
But my problem is how to connect to to it?
When I try Googeling for it I get answers like Did you set the rfcomm capability? see http://msdn.microsoft.com/en-us/library/windows/apps/dn263090.aspx for some details.
But when I look at that page I get lost because I don't what to write in the manifest file.
so in short: How do I connect to the device?
PS: It is a Windows Tablet program.
So you want to know what you have to write in the manifest file, as well as how to connect?
Manifest file:
<m2:DeviceCapability Name="bluetooth.rfcomm">
<m2:Device Id="any">
<m2:Function Type="serviceId:00001101-0000-1000-8000-00805F9B34FB"/>
</m2:Device>
</m2:DeviceCapability>
You can keep Id at "any".
Function type could either be "name:serialPort" or the serviceId specified in the example.
Connecting:
StreamSocket _socket;
RfcommDeviceService service = await RfcommDeviceService.FromIdAsync(device.id);
await _socket.ConnectAsync(service.ConnectionHostName, service.ConnectionServiceName);
Should be able to do the trick.