The Node-RED Platform

1. node.js
2. npm
3. Node-RED
4. Installation of Node-RED on Ubuntu 18.04 using snap
5. Running node-red deamon on Ubuntu
6. Node-Red Dashboard
7. Installing "snmpb" on Ubuntu 18.04
8. SNMP Command Line Tools On Ubuntu 18.04
9. APC MIB's Downloads
10. snmp and Node-RED
11. SNMP References
13. Node-Red and GPIO's
14. Installing on Rpi4 Buster

The Node-RED website: https://nodered.org/

Wikipedia: https://en.wikipedia.org/wiki/Node-RED

Installation of the Node-RED platform, on Ubuntu 18.04, requires three packages be installed; node.js, npm, and Node-RED itself.

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node.js

Node.js is an open-source, cross-platform JavaScript run-time environment that executes JavaScript code outside of a browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser. Consequently, Node.js represents a "JavaScript everywhere" paradigm,[7] unifying web application development around a single programming language, rather than different languages for server side and client side scripts.

npm

Npm is a JavaScript package manager which can be used to install, share, and distribute code as well as to manage dependencies in your projects. It is written entirely in JavaScript as an inspiration from the other similar projects like PEAR for PHP, or CPAN for Perl.

Installing npm:
sudo apt install npm npm -v # returns 3.5.2 npm -h

Updating npm:
sudo npm install -g npm

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Node-RED

Installation of Node-RED on Ubuntu 18.04 using snap

Running node-red deamon on Ubuntu

Node-Red Dashboard

Installing "snmpb" on Ubuntu 18.04

SnmpB is an SNMP MIB browser written in QT. It supports SNMPv1, SNMPv2c & SNMPv3. SnmpB can browse/edit/load/add MIB files and can query SNMP agents. It also supports agent discovery, trap events, and graph plotting.
Load the snmpb sniffer:
Data Returned:
APC Web/SNMP Management Card (MB:v4.0.1 PF:v5.1.9 PN:apc_hw05_aos_519.bin AF1:v5.1.6 AN1:apc_hw05_rpdu2g_516.bin MN:AP8959EU3 HR:02 SN: ZA1330021822 MD:07/30/2013)

https://sourceforge.net/projects/snmpb/

SNMP OIDs Required for Rack PDU 2G Products (AP86XX, AP88XX, AP89XX):
https://www.apc.com/au/en/faqs/FA156179/

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SNMP Command Line Tools On Ubuntu 18.04

The command snmptranslate -On PowerNet-MIB::sPDUOutletCtl.1 produces the conversion to the OID format need by Node-RED .1.3.6.1.4.1.318.1.1.4.4.2.1.3.1

In order to query any Rack PDU 2G units via SNMP, the subtree is located at that the following OID: .iso.org.dod.internet.private.enterprises.apc.products.hardware.rPDU2 .1.3.6.1.4.1.318.1.1.26.8.3
Source: https://www.apc.com/au/en/faqs/FA156179/

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APC MIB's Downloads

snmp and Node-RED

SNMP References

Node-Red and GPIO's

Installing on Rpi4 Buster