IEdge NodeRED iAlarm Sample

Introduction

This document will introduce a NodeRed sample code for user define their own alarm flow and message in iEdge. In this example, we use Modbus-Master plugin to collect sensor data, and if the status sensor returns 0 which means device does not any abnormal, other wise, sensor returns error code. We use NodeRed to design a work flow that will send corresponding error message which depends on the error code. 

Set Global Variable

To avoid a large number of notifications in a short period of time, this sample code adds a variable to record previous error code. If sensor returns error code, iEdge will send alarm once and will not notify again if getting the same code with previous time again.