Sending Wireless UDP signals in Matlab

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Timothy Castiglia
Timothy Castiglia on 21 Jul 2015
Commented: Walter Roberson on 23 Jul 2015
I am a beginner with Matlab wireless connections. I simply want to send a number (0-255) wirelessly to another IP address. I send the signal with the code below but nothing seems to show up on the receiving end:
>> u=udp('', 50002,'LocalPort', 50001);
=>> fopen(u);
=>> fwrite(u,50);
=>> fclose(u);
I have tried other variations of the upd function but I do not understand it very well. Is there anyone who knows what the Matlab code should look like? Or am I doing this right and something else must be wrong?
Thank you!
  1 Comment
Walter Roberson
Walter Roberson on 21 Jul 2015
That code looks appropriate.
Are you able to ping the remote device?

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Answers (1)

Dasharath Gulvady
Dasharath Gulvady on 23 Jul 2015
Before executing "udp", start the UDP echo server using "echoudp":
You mentioned - "nothing seems to show up on the receiving end", how did you test this in the receiving end? What is the command you are using?
Execute all the commands mentioned in the example of "echoudp", and see if "fread" returns a valid result.
  1 Comment
Walter Roberson
Walter Roberson on 23 Jul 2015
I do not see anything about this question that would suggest the use of the udp echo server? The destination is another IP address, not testing to the same IP address.

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