ZMQ SUB Source: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
Sink the contents of a msg port to a ZMQ PUB socket.
Receive messages on ZMQ SUB socket and source stream.


This block acts a message port receiver and writes individual messages to a ZMQ PUB socket.
This block will connect to a ZMQ PUB socket, then produce all incoming messages as streaming output.
A PUB socket may have subscribers and will pass all incoming messages to each subscriber.
Subscribers can be either another gr-zeromq source block or a non-GNU Radio ZMQ socket.


== 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>


; Address
; Address  
: ZMQ socket address specifier
: 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).


; timeout
; Timeout
: Receive timeout in milliseconds, default is 100ms, 1us increments
: Receive timeout in milliseconds, default is 100ms.
; Pass Tags
: Whether source will look for and deserialize tags.
; Hign Watermark
: High Watermark to configure the socket to (-1 => zmq's default)


== 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.
This is a flowgraph of an Amplitude Modulation receiver. The signal from the transmitter section is received by the ZMQ SUB Source. It is a 48khz carrier with a sample rate of 768khz. For complete details, see [[Simulation_example:_AM_transmitter_and_receiver#AM_receiver]].
 
[[File:AM_receive_fg.png|900px]]


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

Revision as of 12:21, 14 April 2020

Receive messages on ZMQ SUB socket and source stream.

This block will connect to a ZMQ PUB socket, then produce all incoming messages as streaming output.

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.
Pass Tags
Whether source will look for and deserialize tags.
Hign Watermark
High Watermark to configure the socket to (-1 => zmq's default)

Example Flowgraph

This is a flowgraph of an Amplitude Modulation receiver. The signal from the transmitter section is received by the ZMQ SUB Source. It is a 48khz carrier with a sample rate of 768khz. For complete details, see Simulation_example:_AM_transmitter_and_receiver#AM_receiver.

AM receive fg.png

Source Files

C++ files
TODO
Header files
TODO
Public header files
TODO
Block definition
TODO
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