Introduction to the GRD-MQ

Purpose of this manual

The purpose of this manual is to provide the instructions to quickly and easily install and operate the GRD-MQ equipment

The installation of the GRD-MQ also implies the installation of middleware and eventually any other application depending on the intended use for the system.

Telemetry solutions GPRS with GRD-MQ

The GRD-MQ has multiple uses. These are the most common uses that will guide you to read this manual.

GPRS RTU/Datalogger to MQTT broker

There are hundreds of types of sensors that can be contacted directly to the GRD-MQ inputs to measure different types of variables. Depending on the GRD-MQ model, sensors could be used to deliver signals in 0-10V, 4-20mA or pulses, or simply connect different devices to their inputs/outputs. The GRD-MQ can also be configured as Modbus master and queries can be made to different slaves to expand its inputs/outputs.

The GRD works as a datalogger, creating records with timestamp with the value of the built-in or external I/Os and publish them to the broker

The GRD can also be used to do a local control over its inputs/outputs using the script programming feature.

Nota: Exemys does not provide the MQTT broker

For this type of solution the following procedure must be followed:

Remote serial port

This procedure will allow you to send and receive data to and from the serial port (RS232/RS485) using publish and subscribe.

For this type of solution the following procedure must be followed:

SMS alarms / control

The GRD-MQ can send SMS alarms to up to 8 recipients based on the value of its inputs.

You can also send and SMS to the GRD-MQ to ask for the value of a particular input/output or to activate an output.

This inputs/outputs can be physical or Modbus signals.

The SMS feature can be used together with GPRS solutions.

Script programming can also be used for customized solutions where the standard criteria to send SMS alarms is not enough.

For this type of solution the procedure below must be followed: