-
Welcome to B4X forum!
B4X is a set of simple and powerful cross platform RAD tools:
- B4A (free) - Android development
- B4J (free) - Desktop and Server development
- B4i - iOS development
- B4R (free) - Arduino, ESP8266 and ESP32 development
Android Question Walkie Talkie over cell Networks
- Thread starter iCAB
- Start date
- Similar Threads Similar Threads
Cell Networks like GSM through a Telco will be MUCH MORE expensive than Data Connections and Wi-Fi
Maybe when you are in the Jungle, Satellite would be better - which is what I am looking for
Maybe when you are in the Jungle, Satellite would be better - which is what I am looking for
Upvote
0
Hi Goldman
I meant data connection over cell network or Wifi, it doesn't really matter, as long as the participants aren't on the same local area network.
Upvote
0
Hi Erel
Thanks for your reply.
I wasn't planning to have a direct connection. instead a WebSocket relay using a B4J middleware.
But I don't have enough experience streaming and concatinating wave files in real time. I am worried about the quality and having the voice waves chopped.
Check the quality on this app. https://zello.com/app I am wondering how it's done.
Upvote
0
Zello have an API. It is here
I have looked a several of these and different ways of doing it and always return to Zello. I just have not had the time to sit and look at it in depth. This situation should change in 3 weeks time though and 'll report back as to what I can do.
Maybe in the meantime there is someone else who might see their way clear of doing a feasibility study.
I have looked a several of these and different ways of doing it and always return to Zello. I just have not had the time to sit and look at it in depth. This situation should change in 3 weeks time though and 'll report back as to what I can do.
Maybe in the meantime there is someone else who might see their way clear of doing a feasibility study.
Upvote
0
Hi Bill
Thanks for your feedback. But I believe the SDK cost is 6$/month per user, which can be an issue .
Upvote
0
Hi Tigort
Thanks for your input.
Sounds interesting, I will dig into it.
Have you done it?,
do you know if it does work for group chat in real time?
Upvote
0
Yes, it's a phone system. You can have a PABX to switch hundreds of communications and make a conference between a number of smartphones. For server, look for voip pabx on Google. They are free. Or you can hire one virtual PABX on public servers.
Upvote
0
Thanks again,
It looks like a solution that might work, as long as it allows auto answer (so it will act as a regular walkie-talkie)
One issue, I was unable to find a B4I library as the app must work on iPhone as well
Upvote
0
Dunno if a B4I library is present, the question was on B4A forum. I have abandoned IOS development, because of restricted Apple's policies. Almost none of my App working in Android were working on IOS, and Apple takes 2 weeks for approving a single patch(!!!!) and many times denies. Ask on this site for this capability. Or build a wrapper for some library you can find on the net. Look https://www.linphone.org/
they have a nice library and also a free server to host your calls. The phone App can be controlled via Api very well.
they have a nice library and also a free server to host your calls. The phone App can be controlled via Api very well.
Upvote
0
mmm,
My guessings iCAB, Zello is using Multicast, because they are looking to work like a RADIOS with PTT buttons, download it, and put a sniffer to capture the data packets, perhaps you will see multicast IP address such as 224.0.0.0 to 239.255.255.25. Or follow the idea of tigrot use an iPBX, perhaps is a good idea read about SIP-Proxy.
My guessings iCAB, Zello is using Multicast, because they are looking to work like a RADIOS with PTT buttons, download it, and put a sniffer to capture the data packets, perhaps you will see multicast IP address such as 224.0.0.0 to 239.255.255.25. Or follow the idea of tigrot use an iPBX, perhaps is a good idea read about SIP-Proxy.
Upvote
0
Daniel, I highly doubt that this is what Zello is doing. I think they go to a middleware which acts as a relay. They also capture and record the messages for you, when you are offline. So obviously there is a server.
Upvote
0
Does anyone know if the sip library allows auto answer, so the app can behave as a walkie-talkie?
I also found this interesting post:
https://www.b4x.com/android/forum/threads/voip-sip-sdk-for-b4a.73860/#post-468976
From what I have read also, WebRTC may be an option, but again I have no experience with that. Hoping to get some input.
I also found this interesting post:
https://www.b4x.com/android/forum/threads/voip-sip-sdk-for-b4a.73860/#post-468976
From what I have read also, WebRTC may be an option, but again I have no experience with that. Hoping to get some input.
Upvote
0
Check the docu of the library! There must be a indicator for this if there is such a functionality...
Upvote
0
Thanks Don,
I just double checked and there is AnswerCall, hopefully this will do the job.
Upvote
0
Check the abto site for a price... It is NOT FREE and the price you only get after a request....
Upvote
0
