Network monitoring and GPIO control with SNMP

Pins and Nodes

© Lead Image © Julia Borisenko, 123RF.com

© Lead Image © Julia Borisenko, 123RF.com

Article from Issue 216/2018
Author(s):

Monitor disk space and network and CPU loads with SNMP, view and control Rasp Pi GPIO pins remotely with custom SNMP objects, and create web dashboards with Node-RED.

Some of the great full-featured networking packages like Nagios [1] and MRTG [2] can be loaded on a Raspberry Pi. If, however, you are looking for something a bit smaller in scale, a Simple Network Management Protocol (SNMP) installation and Node-RED is a great place to start. Node-RED [3] is a visual programming environment that lets you create applications by dragging and dropping blocks (nodes) on the screen and directing the logic flow by connecting the nodes together.

In this article, I look at some basic SNMP monitoring that will allow you to integrate a Raspberry Pi into a larger network (Figure 1).

Figure 1: Monitor devices in your home network and various sensors connected to Rasp Pi GPIO pins with Node-RED and a smartphone.

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