Simple VoIP client od STM32l475 MCU

[Juliusz Bojarczuk]

Posted on January 22, 2018 at 20:31

Hello everybody!

I want to make a simple VoIP client handling SIP and RTP protocols. It needs to be very simple (connect to the VoIP server, make a call, pick up a call, end call), fast and reliable.  I'm wondering if there are some solutions that could help me to make this? (Simple example would be great

:)

) My first idea was to make own poject to handle SIP and RTP stack, but i think it would take a lot of time to finish.#sip #voip #rtp #phone

[Andrew Neil]

Posted on January 23, 2018 at 10:03

If you want 'simple', surely a Raspberry Pi would be more appropriate here?

https://www.google.co.uk/search?q=VoIP+Raspberry+Pi

 

Developing this on a microcontroller is not going to be 'simple'

[WonHo Sung]

Hi Juliusz,

You might be interested in our VoIP solution.

Please take a look into the demo video.

https://youtu.be/BzXaFzCm2v4

[Charles Blanchard]

Hello @Juliusz Bojarczuk​ , I'm trying to make the same thing.

Did you succeded in making your project?

Thank you,

Charles

[Webe.6]

Hello @Juliusz Bojarczuk​ @Community member​ ,

would like to start a similar project as you, an implementation of a SIP client on a STM32H753 with RTX. There are many libraries for e.g. Linux systems, but I could not find an implementation directly on the controller or on a RTOS like RTX so far. Were you successful with your projects? If yes, which library did you use or did you implement the SIP client yourself?

Many greetings

Felix

[Andrew Neil]

Given that there was no reply to the same question 3 years ago, it seems unlikely that any will be forthcoming now ... ?

"There are many libraries for e.g. Linux systems"

So, again, wouldn't a Raspberry Pi be more appropriate here?

[Webe.6]

Thank you for your reply. Yes you are right of course that a Raspberry Pi would be much easier here, however there is an existing project with a STM32H7 which should only be extended with appropriate functionality. I don't have time at the moment to port the whole project to a Linux base, hence this approach.

Why do you think that after 3 years there is no one who could have implemented this ?

[Andrew Neil]

I didn't say there'd be nobody - just that it's unlikely that the people you mentioned from 3 years ago are going to reply.

Also, you've posted in a thread about a different processor.

[Peter BENSCH]

Well, so often VoIP clients have not been realised with Cortex-M, but last year a developer published his idea: Developing SIP Phone with GUI on STM32 MCU

Maybe that's an interesting approach?

Regards

/Peter

[Andrew Neil]

and that one is on an STM32F7

Edit

Even in the optimised version shown there, it's using 300K RAM - so that wouldn't have fitted on the STM32L475.

The biggest STM32L4 has 320K RAM - so even that would've been a bit tight.

https://www.st.com/en/microcontrollers-microprocessors/stm32l4-series.html