When I use esp-idf. All the examples that use the WiFi library call the nvs_flash_init function. Why? Is this necessary because the WiFi library uses encrypted data?
Thanks for your help!
The Wifi library uses NVS flash to store access point name and password
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Hey I'm new to Arduino programming, I was wondering how i can connect my device to store data to parse.com.
I know the REST API Key but not sure one what to do. Any help would be appreciated, and if possible can you provide source code or examples.
Thanks!
This is now possible. An Arduino Uno + ethernet shied still can't make HTTP requests, and parse.com still needs HTTPs, but Temboo makes it possible. Here's what you need to do:
Create an account at Temboo.com
Go to the Parse bundle
Find the Choreo you're interested in e.g., UploadFile, and test it out from the Temboo website
Turn on IoT Mode, set up your shield, and use the generated Arduino sketch code to connect your board to Parse.
Here's a blog post about Temboo's Iot Mode - the feature makes all of this possible:
http://blog.temboo.com/post/88573872731/flip-the-switch-and-get-going
I hope this helps.
I've been just wondering if there's any method to proxify an app without hooking the connect() function after injecting my dll or changing the hardcoded ip address to which it connects itself.
I need it to connect to changed IP address, and since it doesn't use hostname but an IP address I can't use hosts file to do so.
I need it for a bit more than just sniffing, so using anything like WinPcap isn't an option.
If anybody could point me to something useful, I'd be very grateful. The programming language doesn't really matter to me, but as a note - I'm mostly coding in Delphi.
Thanks in advance, and cheers! :)
Edit:
I'm not looking for any third-party apps, just a method that I could implement in my own app.
How can I get my own IP address using WinINet APIs?
If it's not possible using WinINet APIs, counld you please suggest which Win32 library I have to use for this purpose?
I need the library which I can use in my C++ code. I don't need a C# or .NET library.
Actually I have to use it in my Qt application.
You shoud use QList<QHostAddress> QNetworkInterface::allAddresses () [static]
Do you mean the public IP address or your interfaces' IP address? The public IP address can be extracted from the page whatismyip.com. The other answer gives you the local IP addresses.
So I have a bluetooth device, this device uses SPP to transfer data between the PC and itself. It connects fine through Windows as a bluetooth device. I can find it, enter the paring code and assign it to a COM port. Now I want to be able to send data through the com port using Windows API but it is refusing to do so.
I suspect that I need to setup the COMMCONFIG Structure correctly (see below)
http://msdn.microsoft.com/en-us/library/aa363188(VS.85).aspx
Unfortunately I have no idea what is the proper setting. I know SPP is supposed to emulate the RS-232 communication... so maybe I have to study up on that to figure out the right setting? Or is there some automatic way to set the COMMCONFIG structure.
I seriously doubt it. If it would be used then you'll have no chance at guessing at the custom provider data without docs from the driver author. Pay attention to the handshake signals, serial port devices routinely ignore anything sent to them when the DTR signal is turned off. And not send anything back with DTR off. A driver would emulate that. Use EscapeCommFunction() to turn them on. Also try a serial comm program like HyperTerminal or Putty to test this so you can isolate the source of the problem.
Why not use the Bluetooth sockets API? No need for troublesome (virtual) COM ports then.
If you're using managed code then see my library 32feet.NET
If using native code, use SOCKADDR_BTH with Winsock connect etc, see e.g. Bluetooth and connect (Windows) Then you can use the standard Winsock send/recv API
Ok, I found that you can use the
GetCommConfig and GetCommState functions to figure out the settings.
How to send image from server to client through bluetooth in j2me?
If you are in control of both the server and client, then you don't need to worry about the complexities of OBEX. You can create your own lightweight protocol that does only what you need.
If you are new to Bluetooth on J2ME, start by reading about JSR 82. You'll want to create an RFCOMM/SPP connection between your client and server.
Next is the matter of sending an image over a serial connection in J2ME. If you have the image loaded as a javax.microedition.lcdui.Image, you'll need to obtain the ARGB pixel data using Image.getRGB().
This gives you an int array, which you'll need to send over the SPP connection (look at DataOutputStream.writeInt()), and rebuild at the other end using Image.createRGBImage().
HTH.
I've found the avetana Bluetooth libraries to be a bit unstable, and found BlueCove to be a better proposition. As mentioned, OBEX is the OBject EXchange protocol to use, and the docs are all over the internet.
If you look into "apps\BluetoothDemo\src\example\bluetooth\demo" folder of Sun WTK 2.5.x installation folder, you can find BTImageServer.java and BTImageClient.java source codes.
It uses serial profile to send image data from server to client. I think you can easily understand by looking it.
If you mean OBEX, try avetana (obex implementation on JSR-82) - it includes some example.