Using Zabbix in an
IoT Architecture...with the right hardware

Fabrizio Fantoni // Systematica

Presentation
Fabrizio Fantoni
System Administrator and Zabbix Trainer

Systematica is the tech subsidiary of Gruppo Finmatica
Developing and supporting software for Government and
Healthcare organizations.
Zabbix is used since 2009 to monitor systems andapplications deployed on our customers.

What is IoT ?
(Internet of Things)
IoT describe a new way to interact with things around us.
IoT is a “revolutionary evolution” beyond machine-to-machinecommunications (M2M): it permits high connectivity of sensors,devices and systems.
IoT is DATA, a huge amount of Data that can be use to take decisions.

Is IoT the future?

Different type of IoT
IoT is a technology used in two different ways●

IoT in Consumer marketplace

Mobile Phones, Bracelets, GPS, home automation etc…

●

IoT in Industry and SmartCities

Energy Management, Industry Automation, Environment monitoringTwo different ways to use the same
technology, with different goals

IoT in Consumer MarketPlace
Many vendors in an extreme competitive market.
Lack of standards, every vendor has its technology and way
to use and analyze data.
A LOT of data to collect and analyze, a job for Big Data Analysts
and Data Scientists.

IoT for Industry and SmartCities
Mostly based on legacy and custom applications, it’s the new hot trend nowadays1,
especially focused on Energy Management and Environment Monitor.
The technology chosen must be simple to install and integrate well with existing
devices.
One of the application of IoT in industry and SmartCities is to analyze where energy
is wasted to reduce cost and pollution.
1.

https://en.wikipedia.org/wiki/Smart_city
https://en.wikipedia.org/wiki/Industry_4.0

The way we have chosen:
Industry and SmartCities
Consumer IoT is for big players who start from creating the device to the dataanalysis (Google, Fitbit, Neurio, etc…).
People expect a simple way to interact with a device, don’t ask for customization
but choose the device by cost or fashion.
Industry and SmartCities want custom project, designed and ready to bemodified to satisfy new needs.
Data must be always available (OpenData) and exportable (Cost analysis,accounting, etc…).

What Industry wants
It is preferable to be able to use existing sensors
Hardware used must work in a noisy
and dusty environment (no fan)Is better if hardware can be fixed in a DIN slide inside a box(no PC or caseless device)
The solution must work with minimal maintenanceCollected data may be available to be used for internal analysis

NO!

What SmartCities wants
Project must be modular, start small
and grow over time
The technology used is preferably to beOpen Source
Data must be readable and reusable (OpenData)
The software must be simple to use
and supported for a long timeSensors in industry and SmartCities
The big part of sensors used in industry automation or environment monitoring
use a communication protocol called MODBUS.
Some sensor are based on SNMP, via ethernet or WiFi.
Other have proprietary way to collect data and a set of API to retrieve those.
A IoT gateway must be able to collect data in different ways.

Can Zabbix be use for it

YESCan Zabbix be use for it

YES
But with the right hardware

Pros of Zabbix●●●●●●

Distributed monitoring by proxy
To be able to create a network of (proxy) gateways and collect data in a safe place.
Custom items
To pull data in different ways from different sensors (SNMP, MODBUS, scripts)
Open Database schema
To extract data with common reports utility
API
Integrate with other portal (ex: Grafana) and automatic configuration of hosts/items
Low footprint for proxy and agent
Can be installed on small appliance
Proxy run on Linux and require minimal configuration

Three challenges
1.

ModBus protocol, what is it and how can I retrieve data?

2.

Remote and easy configuration when sensors areadded/removed

3.

Hardware of gateway must be usable in an industry
environment (no fan, protected case, ability to fix in a box)

ModBusthe standard of industry communication
https://it.wikipedia.org/wiki/Modbus
Used in many sensors, using only 2 or 4 wires (on RS485) and can be extend up to 1,2 Km.
From 1 up to 247 devices can be in a single cable line, every device can be polled for a lot ofnumeric and string data.
Supported in zabbix by a loadable module: https://github.com/v-zhuravlev/libzbxmodbus

Remote configuration of gateway
A gateway is a embedded hardware who have Zabbix Proxy installed.
Using Zabbix Proxy on a gateway device allow to change configuration fromZabbix Server when a new sensor is installed. No need to operate on gateway.
The configuration is stored on Zabbix Server. This enables us to simply change
gateway if it breaks.
Zabbix Proxy can cache data in case of communication problem.

Hardware used for gateway device
To be compliant with the needs of an industrial environment
we choose a modular product engineered and made in Italy:

The Gropius Multiutility Concentrator
Crafted by SinTau
http://www.sintau.it

Gateway Hardware description
The Gropius MUC is a MultiUtility Concentrator performing the following features:
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very high performances
Linux based systemGigabit Ethernet
Flash base Storage
GPRS\3G\4G
WiFi IEEE 802.11 g\nRS485\CAN\SPI
PLC HomePlugAV, HomeGreenPHY,G3

Hardware is modular and expandable and compatible with Zabbix Proxy and Agent 3.0.

Gateway Hardware description
The main controller is based on an ARM processor running Linux Debian Embedded or OpenWRT.
The system is provided with 2 Gigabit Ethernet, RS485, CAN bus, USB.
A number of communication modules are available in order to increase the interface capability andcommunication technologies.
6LowPAN @868 Mhz and DUST @2.4 Ghz are already available.
HGP and WMBUS #169/868 Mhz are under development.

Use case for Energy Management
A company wants to measure and analyze energy consumption of the headquarter,distributed in two floors on the same building.
The building is separated in 9 different zones by electric fuse boxes.
Every fuse box has a Nemo D4-Le Multifunction Indicator, with Modbus output.
Using the ethernet cabling already present all the Multifunction Indicators was joined
in a single bus and connected to the Gropius Gateway, on the modbus RS-485 port.

Logic SchemaID 4ID 3ID 2ID 1
Ethernet

RS-485Zabbix
ServerEvery multimeters is connected on the same bus and configured with a different ModBus ID
The Gropius Gateway has the ModBus hardware module installed and Modbus Zabbix loadable
module compiled.
It’s configured as Zabbix Proxy on Zabbix Server

Configuration on Zabbix ServerFor every sensor an host is created and put underGropius Proxy monitoring
A template is linked to the host with a UserMacro
identifying the ModBus ID

Configuration on Zabbix ServerItems read the modbus registry of the measure**Look at the modbus module ReadMe for the items
key syntax.
Load modbus module on zabbix agent to test with zabbix_get utility:
root@gropius:~# zabbix_get -s localhost -kmodbus_read_registers["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]

Example of only lighting system power consumption (all fuse box).
As you can see the office opens at 7:30 and close at 20:30 after cleaning. It seems that at
19:30 people need more artificial light.

Latest Data

Same Data but with Grafana

Faced Challenge
Choosing the right sensor for the desired measures can be hard
Understand how to pull data from Modbus is another challenge, especially for people
like us who are used to work with snmp, agent or databases.
Connecting sensors to gateway is a problem, it needs wiring work and that is notalways feasible. Some new technology are out but need testing:● 6LoWPAN● DUST/WMBUS

What we learned
Zabbix is not only a great server and network monitoring solution, but it can be usedeffectively in an IoT scenario.
The architecture of Zabbix let us use it in embedded devices and in distributed
monitoring simplifying a lot the deployment and configuration.
The API, the loadable modules and external check let us monitor everything and show
data in different ways.

Future project
The chosen technology is ready to be
use in any place where we need toread remote measurements and put
in a single repository, ex. for billing
purpose.

●●●Water meter
Gas meter
Any meterThank you!
support.zabbix@ads.it / www.systematicasrl.it
www.sintau.it