CC3120: Message Broadcasting

Jamuna T R

Prodigy 10 points

Part Number: CC3120
Other Parts Discussed in Thread: CC3220S

Is there any option to broadcast a message in TCP layer or using RAW Sockets

over 2 years ago

0 Jan D over 2 years ago

Guru 73375 points

Hi,

No. TCP protocol does not support broadcast or multicast. If you need broadcast you should use UDP. Using RAW sockets you can use CC3120 as "radio" device and implement your own protocol.

Jan

0 Jamuna T R over 2 years ago in reply to Jan D

Prodigy 10 points

Can we create both UDP server and client on same device.

Please share the UDP server sample code

0 Jan D over 2 years ago in reply to Jamuna T R

Guru 73375 points

Hi,

Yes, you can. This example demonstrate using UDP client/server via BSD sockets.

Jan

0 Jamuna T R over 2 years ago in reply to Jamuna T R

Prodigy 10 points

Please share the sample code for UDP server for CC3120

0 Jan D over 2 years ago in reply to Jamuna T R

Guru 73375 points

Hi,

UDP server code you find at CC32xx SDK example udpecho.

But you should look to examples at link above. It will help you to understand how UDP with BSD sockets works. Without this understanding you will not be able manage your task.

Jan

0 Jamuna T R over 2 years ago in reply to Jamuna T R

Prodigy 10 points

Sorry i'm not getting option to download sample code from CC32xx SDK example udpecho.

It will be great help if you can share the open source document.

0 Jan D over 2 years ago in reply to Jamuna T R

Guru 73375 points

Hi,

Inside CC32xx SDK (current version 5.10.00.02) you find this example under examples\rtos\CC3220S_LAUNCHXL\ns\udpecho. Example you find at TI resource explorer as well.

Jan

0 Jamuna T R over 2 years ago

Prodigy 10 points

Hi,

By default UDP stack is enabled in CC3210? If not please let me know how i can enable it.

Currently we are using only TCP protocol and if i try to create UDP or RAW socket i'm getting error during socket creation itself. I'm using same example code shared by CC3120 simple link.

I'm getting return value as -2018 for calling sl_Socket function.

And how can we test UDP server and client with windows if any application i can use for the same please suggest me.

Please help me out.

Thanks,

Jamuna

0 Jan D over 2 years ago in reply to Jamuna T R

Guru 73375 points

Hi Jamuna,

Yes, UDP is embedded by default inside CC3120 by same way as TCP. Error code -2018 is returned, when you call sl_ API before NWP is started (by sl_Start API). Before calling any sl_ API, NWP need to be started.

For testing UDP is many programs freely available at the internet (e.g. netcat, Hercules setup).

From your question is looks like that you not have high level of basic knowledge of computer networks. I am not sure if you are going by right way. If you deeply describes what you need to exactly, I can review your direction.

Jan

Wi-Fi

Wi-Fi forum

CC3120: Message Broadcasting