Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 9 years ago.
Improve this question
I remember that
old modems used phone lines to transfer internet data.
I'm aware that it would be expensive (see edit notes below) and most mobile phones have cellular internet.
But here's my question:
How Can i transfer internet data over mobile phone "call line" without additional hardware?
EDIT:
I'd like to transfer data via voice channel.
I made some calculations and the results are that transfer at 56Kbits per second would be 20 times more expensive then using internet provided by cell company.
The answer if its possible is:
-probably yes for android and
-no for iOS
Here is a video for acoustic modem using speaker and mic http://www.youtube.com/watch?v=bLRK51_1L2k
I guess it would be possible to make Android app that would receive call and demodulate incoming data.
As for the iOS - the problem is in their Terms Of Service.
Because Apple don't want anybody to record phone calls (to obey the anti wire-tapping laws),
it dosn't allow to forward call to app.
Related
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 2 years ago.
Improve this question
I am building a quiz app with Ionic React. I want to implement some kind of quiz timer/countdown feature to limit time spent on every question. The catch is, if I implement a countdown function on client side or Front-end, I'm afraid that folks could tamper with the script and cheat by manipulating the timer to their advantage.
Therefore, I think the only way to prevent this is to implement the timer/countdown feature server side. However, I do not know the right way to go about this... Wouldn't a countdown function blocks the server? Or is there some other way that I do not know?
There are two ways to handle this:
http:
You can run a timer at frontend. Notify the backend with start / end timestamp of each question to calculate the duration taken for each question. If the duration falls within the allowed range, you are good to proceed. Here, frontend is your source of truth but you are validating it at the backend.
websocket:
Or you can implement a websocket to communicate in real time with the backend. In this case, you can run the timer at backend and show its progress at frontend in realtime. Backend will be your single source of truth.
You can check this post too.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
So I'm developing a 2d game using sdl1.2 on linux as a part of a college project and I need the player to be able to submit his score to know his ranking against other players who played the game aswell and I was wondering what am I going to need in order to achieve this with C, is socket programming the answer?
Thank you.
Yes, if your concern is about the communication, then socket is the only way, of course there are easy to use wrappers around socket, like zeromq etc.
The server would create a server socket and listens on it, and each client will connect to this server and then send the scores and any other data necessary to the server.
For data persistent, you can use embedded database like SQLite or leveldb etc.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack Exchange site, you can leave a comment to explain where the question may be able to be answered.
Closed 8 years ago.
Improve this question
Can i connect mobile battery of one smart phone for another. I'll use all 3 pin connections. Is there any risk involved?
I'm facing some problem with my mobile battery and phone switches off all of a sudden. I'm using huawei ascend P1.
ther is no problem replacing bettery from one phone to another as far aws voltage and size of the bettery is same. mobile switching off suddencly can of many reason bettery replacement is the one solution from them other could be your mobile is not storing charge properly and charging ic got problem as far as HUAWEI Ascend P1 concern it store bettery via its main flash ic so their is not charging IC with it.
Regards
Imran Qasim
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 8 years ago.
Improve this question
I'm want to save some datas on an online db. How can I connect to an online database (SQLSERVER) on windows phone 8 ?
Thank you.
Dont connect directly to a database from a mobile phone. Use webservices either SOAP or REST. You are opening a can of worms by exposing your database directly to the internet.
Also if you want to expand and include other phones i.e. iPhone and Android to your database then you are going to have lots of different code to maintain.
See this answer Android access to remote SQL database for more information about this.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 7 years ago.
Improve this question
Are there any real production quality sites running on appengine? I've looked around and am finding mostly small applications.
Could someone please point me to some that get a high amount of traffic?
Panoramio.com runs on App Engine, and I'm pretty sure it receives hundreds of thousands of hits daily as it serves the user images you see on Google Maps and Google Earth. Mind you, it was not originally developed in App Engine, it was eventually migrated there after the service got acquired by Google.
Also check out this StackOverflow question: https://stackoverflow.com/questions/2044595/what-is-the-largest-website-deployed-on-google-app-engine