send sample message to child from Leader/Router

[Praveen Kumar]

Hi,

I want to send/receive message to Child from Leader/router, can any one help me in this regard.
here is My Working set-up,
by cli application, configured 1-Leader, 1-Router, 1-Child, where i am able to work with commands listed in CLI- application. Now i want to send sample Hi message to Child to Leader (How can child receive send by leader/Router or How can Leader/Router send message to Child). How i can integrate messages with leader or Child.

Thanks,
Praveen

[Jonathan Hui]

Hi Praveen,

You can use OpenThread's UDP APIs for sending/receiving UDP messages.  If you are used to socket programming, then the following mechanisms should be familiar:

1) On both ends, you need to open a UDP socket using otOpenUdpSocket().

2) On the receiving end, you can to bind to a specific port using otBindUdpSocket().

3) On the sending end, you can send UDP messages using otSendUdp() to a destination IPv6 address and port.

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Jonathan Hui

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[Praveen Kumar]

Thanks @Jonathan Hui,

I am very new to C++, I am facing lot of difficulties to integrate API's with CLI-application code. Please could you tell Elaborately how to integrate API of UDP to CLI-Appliaction.
My requirement is to communicate with two nodes with simple Hi message. I am unable to find where i should enter text "Hi" in message macro structure, Let me know please  how to do it.

Thanks,
Praveen

[Praveen Kumar]

Hi all,

In cli.cpp I have added a command called udp and process for it also.

Inside the udp process, initially checking mode of operation Leader/Child

if leader :

opening port and sending udpmsg by functions --- otOpenUdpSocket(), otSendUdp().

If child:

opening port and bind by functions----- otOpenUdpSocket(), otBindUdpSocket().

Problem is, when opening port I am unable to understand how argument should be passed as function handler, and weather I should write “otUdpReceive aCallback” function.

Please any one let me know.

Is this approach is ok or not, let me know.

Thanks and Regards,

Praveen.