http://www.waterwaysinwhittlesea.org/index.php?action=history&feed=atom&title=Node_RED_data_processing_IINode RED data processing II - Revision history2026-10-07T10:46:10ZRevision history for this page on the wikiMediaWiki 1.41.4http://www.waterwaysinwhittlesea.org/index.php?title=Node_RED_data_processing_II&diff=885&oldid=prevEdmondLascaris: Created page with "== Overview == * This lesson will demonstrate how Node-Red can be used to process data from a sensor. * In this lesson we will learn how to process the output from a python file using the function node in Node-RED. == Learning Objectives == * Learn how to run a Python program using the Terminal. * Learn how to run a Python program using the Execute node in Node-RED. * Learn how to extract data using the Function node in Node-RED. File:Screen Shot 2022-01-01 at 6.37..."2021-12-31T19:40:03Z<p>Created page with "== Overview == * This lesson will demonstrate how Node-Red can be used to process data from a sensor. * In this lesson we will learn how to process the output from a python file using the function node in Node-RED. == Learning Objectives == * Learn how to run a Python program using the Terminal. * Learn how to run a Python program using the Execute node in Node-RED. * Learn how to extract data using the Function node in Node-RED. File:Screen Shot 2022-01-01 at 6.37..."</p>
<p><b>New page</b></p><div>== Overview ==<br />
* This lesson will demonstrate how Node-Red can be used to process data from a sensor. <br />
* In this lesson we will learn how to process the output from a python file using the function node in Node-RED. <br />
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== Learning Objectives ==<br />
* Learn how to run a Python program using the Terminal.<br />
* Learn how to run a Python program using the Execute node in Node-RED.<br />
* Learn how to extract data using the Function node in Node-RED.<br />
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[[File:Screen Shot 2022-01-01 at 6.37.31 am.png]]<br />
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== learning to process data using Node-RED ==<br />
* Node-RED makes it very easy to display data using a Dashboard, but first we need to get the data we need. <br />
* Luckily, we have experience retrieving data from sensors using Python. <br />
* Reading and processing data using Node-RED is not very different.<br />
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=== Open the file peter_hopper_get_data5.py ===<br />
* From the main Raspberry Pi menu navigate to Programming and open '''Python3 IDLE'''.<br />
* Navigate to the /home/pi/peter-hopper-t3 directory. (t3 is short for term 3).<br />
* Open up the file peter_hopper_get_data5.py and review to make sure it is the same as the code below.<br />
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[[File:Screen Shot 2022-01-01 at 6.39.11 am.png]]<br />
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* Run the file and check that it can retrieve sensor data and send the standard output to the Python Shell.</div>EdmondLascaris