I have installed Asterisk and FreePBX on a server. I have set up some extensions for testing and I have configured voicemail for these. I have discovered that voice mail files gets stored in /var/spool/asterisk/voicemail/default/(EXTENSION)/tmp/(TMPFILE).wav
and that they are later moved to /var/spool/asterisk/voicemail/default/(EXTENSION)/INBOX/msg####.wav
I want to stream the voice data to another server in real time so that the server can start processing of the data. That is I want to start streaming the data as soon as a call is received by Asterisk and I do not want to wait for the hang up before sending the sound.
I am looking for how to hook into Asterisk to get hold of the voice data. I have a few ideas so far:
1) Regularly check the /tmp directories for new files and start reading them as soon as they are available. But the file names are random and I also want to find out who is calling for example. Seem like a dead end. Files might also get stuck if I read them while Asterisk tries to move them?
2) Maybe I could write a plugin for Asterisk that can pick up the files in the right step of the process. If so, what do I need to write such a plugin and how can I configure it to get access to the voice data as soon as the voice mail module picks up the phone?
You can use EAGI program which able get sound from channel #3.
http://www.voip-info.org/wiki/view/Asterisk+EAGI
You also can do c/c++ app for asterisk which will do streamming(see source code in apps/ folder for examples)
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Hi this OBD BLE device (https://www.amazon.com/LELink-Bluetooth-Energy-OBD-II-Diagnostic/dp/B00QJRYMFC) is the one I'm using to connect over bluetooth my own iPhone. I have been able to find the right service and the characteristic to write to and to set notify value to true. However, I'm very confused as to what kind of commands I'm supposed to be sending to it. There's a list of mixed instructions online about how ELM327 devices are supposed to receive "PIDs" but also I'm confused if I should be using the list of AT commands.
First time I sent "DP\r" (an AT command) to the write characteristic and got back "DP ?" so I'm guessing it was not understood by the device.
Second time, I was following one PDF which said I should send in Mode followed by PID number so I sent in "01 00\r" which was replied with "NO DATA". I'm guessing this second command might have been better because at least I received something back instead of "?".
Would anybody know what to do in this situation? Thank you
I'm also searching for information regarding the same thing. While surfing on the internet I got a PDF with the command list to be sent to ELM327 devices and another site with info on how to use those commands in simple. So as for the details in this site "DP\r" would not work instead you would need to send "ATDP\r" as every command starts with "AT".
and I suppose that this also will be a useful PDF.
Is it possible to detect new data from the server as it is sent? For example, with express.js:
res.write('Processing 14% or something');
and then display that on the page with a progress bar.
Edit:
My original question was a bit confusing so let me explain the situation. I have created a page where users can upload song files. These files are then converted (using ffmpeg) to .ogg and .mp3 files for the web. The conversion takes a long time. Is it possible to send real time data about the conversion back to the client using the same XMLHttpRequest that sent the files?
If i understand correctly you are trying to implement event based actions. Yes node.js has got some excellent web socket libraries such as socket.io and sack.js
You need to understand nodejs event driven pattern.
Websocket protocol helps maintain full duplex connection between server and client. You can notify clients when any action happens in server and similar you can notify server when any action happens in client. Libraries provide flexibility to broadcast event to all connected client or selected ones.
So it is basically emit and on that you will be using often.
Go through the documentation, it will not take much time to learn. Let me know if you need any help.
I am testing out Vline's API currently and am basically comparing it to OpenTok. The main issue/difference I am running across is that I would like to have the ability for one side to log in to our system start transmitting audio/video and then just wait for the other party to connect at some point in the future (typically 5-10 minutes max) and have them automatically connect up. This can be done with OpenTok fairly easily - as they do not have the same concept of "calling" another user - it is really transmitting a stream to a session and users in the session can receive those transmissions.
With Vline - the problem is that after calling startMedia() if no-one answers within about 15 seconds the mediastream seems to automatically stop. Our goal is to have the first user be able to see themselves in a camera view until the other party connects and then they will see both themselves and the other party.
Is this possible with Vline?
Yes, this is possible. I went ahead and created a simple example that is available on GitHub: https://github.com/vline/vline-room-example
NOTE: We are working on a "Room API" that will make this example much simpler.
I'm developing a sort of Flash Operator Pannel for Asterisk but, with Node.js and Socket.io instead of depending of Flash.
I've polished the node server and the front end BUT I don't know how could I send events from Asterisk to node server and do things that will be sended over the socket.
Given the fact that we have a heavily tuned Asterisk to suit our company needs, connecting to the AMI nor the Asterisk socket will solve my problem because we aren't working with real extensions.
So, despite the Asterisk part, I want to know how could I send info to node through bash or curls or whatever
I thought about using curls to the server but this could cause that someone who knows the commands (pretty unlikely) could alter the application flow with unreal data.
EDIT: Rethinking about it, I would just want to be able to receive requests through the socket/server ??? and then be able to perform actions that will be emited through socket.io.
Is that even possible?
The answer really depends upon what specific data you are trying to get from Asterisk to Node. You're trying to replace the Flash Operator Panel, yet you don't have real extensions. I'm guessing that you are using Asterisk as an SBC/proxy of sorts.
If you truly want an event-driven approach, I suggest modifying your dialplan to reach out to Node whenever needed, with whatever data you want. This would most easily be achieved by calling an AGI script with some number of arguments (written in whatever language) that then connects to Node via an HTTP POST, socket, or other.
If you want a more passive approach, you could have Node stream-read the asterisk log files for data, or, as already suggested, connect to the Asterisk Manager Interface (AMI) and stream from there. Contrary to what has been stated previously, I don't consider this to be a very daunting task.
You want to open a socket from Node to Asterisk's AMI (asterisk manager interface). I never used Node, but I would imagine the code would look roughly like this:
var astman = new net.socket().connect(5038);//connect to port 5039 on localhost
astman.on('data', function(data) {
//do something with received data
});
One of the most well maintained ami libraries are FreePBX's php-astmanager. While it's written in php, it should give you a pretty good idea of what your need to do.
You could certainly set up your node.js program to listen on a socket for messages from Asterisk. But you'd have to roll your own connection management scheme, authentication scheme, message durability (possibly), etc.
Alternatively -- and especially if there is the node server and asterisk server are not on the same machine -- you could use a message queue program like RabbitMQ. That takes care of a lot of the important details involved in interprocess communications. It's pretty easy, too. On the node side, check out https://github.com/postwait/node-amqp
I've never used Asterisk but running command line programs can be done with the child_process module.
http://nodejs.org/docs/latest/api/child_processes.html
I want to a Java ME application that transfers any SMS received to a PC using bluetooth. The PC can then direct the Java ME application via bluetooth to send a response SMS. Is there library available for this architecture or I have to design it myself?
Is this approach correct or a better one exists? I want to use bluetooth as then I will not have dependency on the cable.
You'll need to create this yourself, however you'll find that you can't do what you want with J2ME.
J2ME can't access any old SMS that the handset receives, only ones sent to a specific port upon which the MIDlet is listening. So to get all the other SMSes, create a bluetooth serial/dial-up connection to your handset in the way I've described in this answer.
Create a PC client which repeatedly issues AT+CGML commands (as described in the AT command set document linked to in the answer above), to see when an SMS has been received. Use AT+CGMR to read and parse the message text. Then use AT+CGMS to sent a response. This can all be done over bluetooth.
It's better to use the serial connection to send a response, because a MIDlet cannot usually be triggered to open based on incoming bluetooth data.
Hope this helps.
You may have already achieved your task, anyway for the reference I think it is much better if you try using Gammu . I'm using it for the same task (Send / receive SMS through PC ) with a simple bat file I have written, works like a charm.
Anyway you don't need any J2me program for this.
Wammu takes care of making the connection to phone and sending AT commands.