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Prerequisites

• Knowledge of Ignition and Module installation process: Cirrus Link Module Installation
• Installation of the following Cirrus Link MQTT modules selecting the version compatible with your Ignition installation :
  
  • MQTT Distributor
  • MQTT Engine
  • MQTT Transmission
  • MQTT Recorder
• Installed SQL database such as MySQL (Ver 14.14 Distrib 5.7.12)

Overview

Within MQTT Transmission, a record is a collection of tags under an Ignition folder which are treated as a single entity and published on demand. They are usually used for, but not restricted to, sending flow computer records such as events, alarms and history data.

Records are published via an MQTT client using a Sparkplug-like format such as  spBv1.0/Group/NRECORD/Edge or spBv1.0/Group/DRECORD/Edge/Device with a JSON payload.

Records received at MQTT Engine are passed to MQTT Recorder which automatically generates database tables and populates the rows within the tables with records as they are received. 

This tutorial shows how to configure the MQTT Transmission module modules to generate records and publish them as MQTT messages via MQTT Distributor to be passed through MQTT Engine and passed to MQTT Recorder and records to be stored in an MySQL database.

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