ZMQ SUB Message Source: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
The ZMQ SUB Message Source block receives messages from a ZMQ SUB socket and outputs async messages. This block will connect to a ZMQ PUB Message Sink or a non-GNU Radio ZMQ socket.
This is the template for the [[:Category:Block_Docs|"Page-per-block Docs"]]. This first section should describe what the block does and how to use it, using however many paragraphs necessary.  Note that the title of the wiki page should match the block's name in GRC, i.e. the one defined in the block's .grc file.  Look at the [[FFT]] Block for a good example.
 
As this is a basic template, it's also in the [[:Category:Stub_Docs|"Stub Docs category"]]. Please improve it.


== Parameters ==
== Parameters ==
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>


; Param 1 (''R'')
; Address
: Description of parameter, provide any tips or recommended values. Note that the name of the parameter above should match the param's label that shows up in grc (e.g. Sample Rate).
: ZMQ socket address specifier. The format of the address is <code>tcp://*:port</code> where * should be 127.0.0.1 for localhost.<br>
: <b>Note:</b> If the Source and Sink blocks are on two different computers on the same LAN, then the IP and port number of the Sink block must be specified on each end of that connection. For example, if the Sink is on IP 192.168.2.14:5678 and the Source is on IP 192.168.2.5, both Source and Sink blocks must specify the Sink IP and port (192.168.2.14:5678).


; Param 2
; Timeout
: blah blah blah
: Receive timeout in milliseconds, default is 100ms.


== Example Flowgraph ==
== Example Flowgraph ==


Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI.  Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
In this example, the ZMQ SUB Message Source block is receiving a message and displaying it on the user's terminal.
 
[[File:PUB_SUB_msg_demo.png]]


== Source Files ==
== Source Files ==


; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-zeromq/lib/sub_msg_source_impl.cc /gr-zeromq/lib/sub_msg_source_impl.cc]


; Header files
; Header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-zeromq/lib/sub_msg_source_impl.h /gr-zeromq/lib/sub_msg_source_impl.h]


; Public header files
; Public header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-zeromq/include/gnuradio/zeromq/sub_msg_source.h /gr-zeromq/include/gnuradio/zeromq/sub_msg_source.h]


; Block definition
; Block definition
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-zeromq/grc/zeromq_sub_msg_source.block.yml /gr-zeromq/grc/zeromq_sub_msg_source.block.yml]

Latest revision as of 17:13, 28 November 2023

The ZMQ SUB Message Source block receives messages from a ZMQ SUB socket and outputs async messages. This block will connect to a ZMQ PUB Message Sink or a non-GNU Radio ZMQ socket.

Parameters

(R): Run-time adjustable

Address
ZMQ socket address specifier. The format of the address is tcp://*:port where * should be 127.0.0.1 for localhost.
Note: If the Source and Sink blocks are on two different computers on the same LAN, then the IP and port number of the Sink block must be specified on each end of that connection. For example, if the Sink is on IP 192.168.2.14:5678 and the Source is on IP 192.168.2.5, both Source and Sink blocks must specify the Sink IP and port (192.168.2.14:5678).
Timeout
Receive timeout in milliseconds, default is 100ms.

Example Flowgraph

In this example, the ZMQ SUB Message Source block is receiving a message and displaying it on the user's terminal.

PUB SUB msg demo.png

Source Files

C++ files
/gr-zeromq/lib/sub_msg_source_impl.cc
Header files
/gr-zeromq/lib/sub_msg_source_impl.h
Public header files
/gr-zeromq/include/gnuradio/zeromq/sub_msg_source.h
Block definition
/gr-zeromq/grc/zeromq_sub_msg_source.block.yml
Retrieved from "https://wiki.gnuradio.org/index.php?title=ZMQ_SUB_Message_Source&oldid=13644"