View source for EBC Exercise 50 Setting Up Node-Red

[[Category:ECE497]]
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Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.([https://nodered.org/])

The following is based on [https://groups.google.com/g/beagleboard/c/b7PZXB7JbmA/m/SEB0qTK2AAAJ https://groups.google.com/g/beagleboard/c/b7PZXB7JbmA/m/SEB0qTK2AAAJ].

== Install ==

First make sure you have the current version of Node-Red.

 bone$ '''dpkg --list | grep node-red'''
 ii bb-node-red-installer   1.2.2-0rcnee2~buster+20201021 armhf Node-RED   installer for beagleboard.org
If yours is older do the following.
 bone$ '''sudo apt update'''
 bone$ '''sudo apt install bb-node-red-installer'''
 bone$ '''sudo reboot'''

=== Accessing on the Bone ===
Point your browser to <code>http://192.168.7.2:1880/</code>.

After a bit you will see the Node-Red canvas.
  
[[File:Node-red.png]]

Copy the code below to the clipboard.

 [{"id":"70fd05e2.f03d0c","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"b1dc9221.09e41","type":"gpio out","z":"70fd05e2.f03d0c","name":"","state":"OUTPUT","pin":"P9_15","i2cDelay":"0","i2cAddress":"","i2cRegister":"","outputs":0,"board":"14fb0dec.376712","x":610,"y":180,"wires":[]},{"id":"acb4df30.72216","type":"inject","z":"70fd05e2.f03d0c","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"1","payloadType":"num","x":370,"y":180,"wires":[["b1dc9221.09e41"]]},{"id":"35e9479e.0e2428","type":"inject","z":"70fd05e2.f03d0c","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"0","payloadType":"str","x":370,"y":220,"wires":[["b1dc9221.09e41"]]},{"id":"cca6a964.c0e978","type":"gpio out","z":"70fd05e2.f03d0c","name":"","state":"OUTPUT","pin":"USR3","i2cDelay":"0","i2cAddress":"","i2cRegister":"","outputs":0,"board":"14fb0dec.376712","x":610,"y":280,"wires":[]},{"id":"b9def222.f9a97","type":"inject","z":"70fd05e2.f03d0c","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"1","payloadType":"num","x":370,"y":280,"wires":[["cca6a964.c0e978"]]},{"id":"230706ad.dbc7ea","type":"inject","z":"70fd05e2.f03d0c","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"0","payloadType":"str","x":370,"y":320,"wires":[["cca6a964.c0e978"]]},{"id":"14fb0dec.376712","type":"ioplugin","name":"","username":"","password":"","boardType":"beaglebone-io","serialportName":"","connectionType":"local","mqttServer":"","pubTopic":"","subTopic":"","tcpHost":"","tcpPort":"","sparkId":"","sparkToken":"","beanId":"","impId":"","uuid":"","token":"","sendUuid":"","samplingInterval":"500"}]

Go to the hamburger stack to the right of the red '''Deploy''' button and select '''Import'''.  Paste the above into the window.

[[File:Node-red-import.png]]

Click '''Import'''.

You should see.

[[File:Node-red-flow1.png]]

Try clicking on the '''1''''s and '''0''''s and USR3 and P9_14 will respond.

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