Python Block Message Passing

The previous tutorial, Creating Your First Block, demonstrates how to create a Python block using the Embedded Python Block. The next tutorial, Low Pass Filter Example, demonstrates how to use filtering blocks in GNU Radio.

Message Passing Overview

Messages are an asynchronous way to send information between blocks. There is no sample-clock based guarantee when they will arrive and messages are not associated with a specific sample like a tag.

PMT

describe basic PMT types

link against other PMT pages

• message ports to have to be connected like stream/vector ports

The next tutorial, Low Pass Filter Example, demonstrates how to use filtering blocks in GNU Radio.