What is this?

Server Room Monitoring - a device for monitoring temperature and humidity of servers, server rooms and just for rooms where environmental control is needed.

The differences between this system and Zabbuino in open source for the Arduino IDE. Anyone can customize the device to suit their needs.

You can remove the display if display control is not needed, or change it to any other display by rewriting the code a bit.

You can add or remove any sensor, for example, you can control the content of carbon dioxide or dust particles in the air, everything that you can implement on Arduino.

How its work?

Server Room Monitoring works as a passive zabbix agent. The Zabbix server polls the agent on a schedule, the agent generates data and sends it to the Zabbix server.

Electronic circuit:

Components that I used:

ARDUINO UNO R3 - BASE

ETHERNET SHIELD W5100 - EXTEND SHIELD FOR ARDUINO

SHT31 - TEMPERATURE AND HUMIDITY SENSOR

DS18B20 - TEMPERATURE SENSOR

LCD 1602 I2C - DISPLAY

RESISTOR 4.7K - PULL-UP RESISTOR

D6MG DIN RAIL MOUNTING ENCLOSURE - BOX FOR ARDUINO

RJ45 CAT5 DUAL PORT SURFACE MOUNT BOX - BOX FOR SENSORS

RJ45 CAT5 SINGLE PORT SURFACE MOUNT BOX - BOX FOR CONNECTING SENSORS TO ARDUINO

Libraries that I used:

System Settings:

Setting LCD 1602 or similar (2004 etc)

LCD_ADDRESS - put your address of display

LCD_H - put your number of horizontal screen characters

LCD_V - put your number of vertical screen characters

#define LCD_ADDRESS 0x3F          // i2c address of display
#define LCD_H 16                  // number of horizontal screen characters
#define LCD_V 2                   // number of vertical screen characters

SHT3X settings:

SHT31_ADDRESS - put your address of SHT31

#define SHT31_ADDRESS 0x44        // i2c address of SHT3X

You'll need a Scanner I²C to find the display and sht31 addresses

OneWire settings:

ONE_WIRE_BUS - put your arduino number of pin where OneWire is connected

#define ONE_WIRE_BUS 2            // Pin Onewire (DT18B20) bus

Intervals settings:

MEASUREMENTDELTA - sensor polling interval

LCDINTERVAL - display refresh interval

#define MEASUREMENTDELTA 10000    // Sensor polling interval
#define LCDINTERVAL 5000          // Display refresh interval

DeviceAddress - put your address of ds18b20

// OneWire sensor address array(you need to change the address to yours)
DeviceAddress addrsensdt[] = {
  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },	  // Must be emty (0x00)
  { 0x28, 0x66, 0x66, 0x83, 0x18, 0x20, 0x01, 0x43 },	  // Address of the first sensor
  { 0x28, 0xC0, 0x69, 0x8C, 0x18, 0x20, 0x01, 0x58 },	  // Address of the second sensor
  { 0x28, 0x2C, 0xBA, 0xC3, 0x18, 0x20, 0x01, 0x66 },	  // Address of the third sensor
  { 0x28, 0x09, 0x0F, 0xA9, 0x18, 0x20, 0x01, 0x2D },	  // Address of the fourth sensor
  { 0x28, 0x7E, 0x30, 0x83, 0x18, 0x20, 0x01, 0xB0 },	  // Address of the fifth sensor
};

You'll need Scanner OneWire to find ds18b20 addresses

Zabbix Agent Settings:

ItemKey - put your key

String ItemKey = "GetData"      //Item key of zabbix host

Network Settings:

Сonfigure the network settings to be correct for your local network

Important! Change MAC address! MAC address must be unique on your local network.

byte mac[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };  // Important! Change MAC address!
                                                      // MAC address must be unique on your local network.
IPAddress ip(192, 168, 0, 100);                       // Change IP address if you need.
IPAddress gateway(192, 168, 0, 1);                    // Change GW if you need.
IPAddress subnet(255, 255, 255, 0);                   // Change MASK if you need.
EthernetServer server(10050);                         // Change port if you need.

Zabbix Server Settings:

This is an example setup.

Create host with parameters:

Name: Server Room Monitoring
Interface:
- Type: Agent
- IP: IP address Server Room Monitoring

Create item with parameters:

Name: "Data"
Type: "Zabbix agent"
Key: "GetData"
Type of information: "text"
Update interval: 10m

Ok, now you can turn on the device and get data from Server Room Monitoring. The data of all sensor will come in a text format with a "," delimiter.

Example data string: 23,24,25,26,24,25,46.

The first parameter is the temperature with SHT31.

The second - the first DS18B20 and so on.

The last parameter is humidity from the SHT31 sensor.

Dependent item and regular expressions are used to separate the parameters and pass each parameter to an individual item.

Create dependents items with parameters:

Item#1:
- Name: 'Air humidity in server room'
- Type: 'DEPENDENT'
- Key: 'humidity'
- Delay: '0'
- Units: '%'
- Description: 'Data from sensor SHT3X'
Preprocessing:
- Type: REGEX
- Parameters: '(\d+),(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)' '\7'

Item#2:
- Name: 'Air temperature in server room'
- Type: 'DEPENDENT'
- Key: 'temperature.0'
- Delay: '0'
- Units: 'C'
- Description: 'Data from sensor SHT3X'
Preprocessing:
- Type: REGEX
- Parameters: '(\d+),(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)' '\1'

Item#3:
- Name: 'Air temperature in server room'
- Type: 'DEPENDENT'
- Key: 'temperature.1'
- Delay: '0'
- Units: 'C'
- Description: 'Data from sensor DS18B20'
Preprocessing:
- Type: REGEX
- Parameters: '(\d+),(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)' '\2'

And so on

You can see my template to understand it.

Install components to sensor boxes

First step:

We need to make wiring and install the sensor in the box, you need to make 5 pieces, these will be blanks.

Second step:

Install SHT31 in first box

Third step:

Install pull-up resistor in last box

The result you should have is:

Device photo

Name		Name	Last commit message	Last commit date
Latest commit History 194 Commits
docs		docs
tools		tools
README.md		README.md
Server Room Monitoring.ino		Server Room Monitoring.ino
Server Room Monitoring.yaml		Server Room Monitoring.yaml

disasstor/Server-Room-Monitoring

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