In P2P using Wifi direct I can able to listed and connected the client devices to server device, but able to transfer data from server to only one client at a time. My doubt is!!! - Is it possible to transfer data from server to multiple clients at a time? in P2P Wifi direct. Thanks in advance...
UDP broadcast is possible within a WiFi Direct group. Make sure you add the permission to your manifest:
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
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What I'm visualizing:
4 different devices each running the same app while connected to the Internet via their cellular networks. Is there a way I can broadcast connection requests to all these devices, considering that they're not on the same local network?
I don't have any solid ideas on how to achieve this, maybe something in the the Bluetooth/Wi-Fi Direct (PAN) space?
My case is the following: I will install some prototypes connected together with wifi (one device is the AP) in a distant site. I'd like to be able to remotely connect to my network for avoiding to travel.
As there will be 4G networks available there, I was wondering if a simple solution could be to have a smartphone connected to my wifi network, and use it to forward ssh client requests through 4G connection.
I have no idea if it's possible, how/depending on network operators, if there are standards and software (preferably android) for doing so.
Sorry it this question remains a bit vague, but any pointers would be appreciated.
There are also some 4G boxs that provide internet as wifi AP. I could change my network to connect to it, but I have no idea if I can reliabily get an address to this.
Thanks for your help.
A VPN server might be an option. Like DD-WRT on a router, or your own dedicated VPN server.
After webrtc passes by a signaling server on Internet, how it works when two machines are running in the same network?
The data will be exchanged only on the network or will it still use internet ?
I am asking this because of our internet is not good, it's too slow. but our local network speed is very fast.. So I would like to know if the internet signal will affect the audio and video conversation.
Thanks a lot!
Depending on the network configuration, the devices should connect directly over the local network. Please note that some browsers, such as Safari, may not share with the signalling service local ICE Candidates unless configured to do so (false concern over sharing network info). The devices must share local ICE Candidates, or else they will still stream via the external network or a TURN server, if available.
I am working on indoor gps tracking and for this I need a wifi signal logger which can receive the signals from different smartphone(whose wifi is turned on) an send it to a remote server. I wanted to know, where I can get this kind of hardware, having capability to receive signals from different smartphones and log its signal strength and mac address in a remote server.
Please let me know the details.
Thank you in advance.
Pravin Prasad
In simple terms, Wifi clients(smartphones, notebooks etc.) send periodic Probe Request packets to actively seek wifi access points and Wifi APs(routers, gateways etc.) send periodic Beacon packets to advertise the presence of WLAN network.
You can use any wifi capable device like a smartphone or notebook to log the above packets.
Configure your wireless card in monitor mode.
Use a packet sniffer(for example, wireshark) to capture the traffic on the wireless interface or write your own with libpcap. You may filter on the packet type, source, destination etc.
Preferably, this would be a computer connected via cable, but if there's a way to do it over wifi then this would also be useful. I'm wondering if it's possible to send messages between them?
Or if i had a mac app and an iPhone app, could I communicate between them over wifi or a usb connection, rather than using a server or something?
Connecting over WiFi is possible, cable connection however isn't possible (certainly not in the documented API) unless the phone is jailbroken.
For wifi you're just going to connect to a TCP/IP host/socket. Have a look at CocoaAsyncSocket. The computer would need to be hosting some sort of server software. This is how iTunes Remote and AirMouse work.
There are some "permitted" (non-cracked phone) ways to send data to the iPhone from a device that's physically plugged in. There are several barcode readers - like the Linēa-pro used in US Apple stores - and magstripe readers for credit cards (e.g., the Macally Quikswipe) that can send limited amounts of data to/from the iPhone.
If your computer is a small embedded device and your data requirements are meager, it may be possible.