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Sink the contents of a stream to a ZMQ PUB socket.

This block acts a a streaming sink for a GNU Radio flowgraph and writes its contents to a ZMQ PUB socket. A PUB socket may have subscribers and will pass all incoming stream data to each subscriber. Subscribers can be either another gr-zeromq source block or a non-GNU Radio ZMQ socket.


(R): Run-time adjustable

ZMQ socket address specifier. The format of the address is tcp://*:port where * should be 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 and the Source is on IP, both Source and Sink blocks must specify the Sink IP and port (
Receive timeout in milliseconds, default is 100ms.
Pass Tags
Whether sink will serialize and pass tags over the link.
High Watermark
High Watermark to configure the socket to (-1 => zmq's default)

Example Flowgraph[edit]

This flowgraph is a simulation of an Amplitude Modulation transmitter. It is sending the transmit signal to a ZMQ PUB Sink data socket connected to the receiver section. For complete details see Simulation_example:_AM_transmitter_and_receiver#AM_transmitter.

AM transmit fg.png

Source Files[edit]

C++ files
Header files
Public header files
Block definition