SENSORMETRIX Websensor EM01b User manual

Sensormetrix
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A member of the Olancha Group Ltd
Registered in England No. 4004881
VAT Registration No. GB164 5653 45
EM01b Websensor
Instruction Manual
HVAC Monitor EM01b Websensor
(Ethernet Port Congurable)
Instruction Manual v6.5

Sensormetrix
Basingstoke Road
Spencers Wood
Reading
Berkshire RG7 1PW
UK
[phone]
[phone]
[email protected]
www.sensormetrix.co.uk
sales
fax
email
web
A member of the Olancha Group Ltd
Registered in England No. 4004881
VAT Registration No. GB164 5653 45
EM01b Websensor
Instruction Manual
2
Contents
Page
Copyrights 3
Warranty 3
Introduction to the EM01b 4
How the EM01b Works 5
Websensor Inventory 8
Websensor Connection 9
Quickstart 11
Programming the IP Address 13
Default Settings 14
Units of Temperature 16
Testing the IP Address 17
Websensors Tail 19
Additional Websensor Functions 20
Contact Closure 21
Thermistor Interface 25
Measure Voltage (DC) 28
Connector Connections 29
Troubleshooting the Websensor 32
Application Information 36
Specications 36
Websensor Plug-ins 37
IP Based Facility Management Suite 37

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EM01b Websensor
Instruction Manual
3
Copyrights
The information in this document is subject to change without notice and should not
be construed as a commitment by Sensormetrix. Whilst every effort has been made
to assure the accuracy of the information contained herein. Sensormetrix assumes
no liability for damages from the use of the information contained in this manual. The
conguration software described in this manual is furnished under a license and may
be used or copied only in accordance with the terms of that license.
Warranty
Warranty
Sensormetrix warranties the products to be substantially free of manufacturing
defects for a period of 1 year after purchase during which time the product will be
replaced without charge if defective.
Limitations
Sensormetrix provides no warranty, expressed or implied, as to the tness of the
products for any particular purpose. Sensormetrix will not be liable for incidental or
consequential damages arising from the use of its product.

Sensormetrix
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Reading
Berkshire RG7 1PW
UK
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EM01b Websensor
Instruction Manual
4
Introduction to the EM01b
Sensormetrix’s EM01b Websensor is designed to utilize the internet to transmit
temperature, relative humidity, detect contact closure, power supply voltage
information and illumination data from a remote acquisition point to a host computer
or hosted database.
The EM01b Websensor offers built-in signal conditioning and an embedded mini-
webserver. Users are able to access the sensor using http: based commands.
Figure 1. Websensor EM01b returning data via a HTTP: response
Websensor
EM01b HVAC Monitor
TRANSMIT POWER
Temperature, Humidity & Illumination
www.sensormetrix.co.uk
12V DC
AUX
SENSOR
LAN
Request via HTTP:
Response via HTTP:

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EM01b Websensor
Instruction Manual
5
How the EM01b Works
Simply, the Websensor’s function is to send a response (by a HTTP: message) upon
request of a central website or from the User’s PC.
The EM01b Websensor supports a user congurable IP address. Websensor’s IP
address gives it uniqueness on the Ethernet based network to which it is attached.
It is through the IP address, that the Websensor is able to take its’ place on the
Internet, becoming fully accessible to query by the user.
The Websensor consists of a base unit with two communication ports (Ethernet and
ESbus).
The ESbus combines a networked version of the SPI serial bus and RS232. The
ESbus port is used to support a variety of options available for the Websensor while
the Ethernet port is the route to the Internet and is used to congure the IP address of
the Websensor.
Available options which connect via the Esbus:
• ES01 Two Line LCD Display
• ES11 Flood Sensor
• ES bus hub - for connecting multiple displays or ood sensors to one EM01b
Periodically check www.sensormetrix.co.uk for other options as they become
available.

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EM01b Websensor
Instruction Manual
6
How the EM01b Websensor works
Within the base unit are microcomputers, which handle the Internet protocol, the
communication ports, and the sensor and sensor signal conditioning. The Websensor
has no switches, keyboard or display because it functions as a sensor, not as a
computer.
Figure 2. How the Websensor works
Compatibility with earlier Websensors
Compatibility with the earlier models of Websensor has been maintained. Any version
of the Websensor will always return temperature, relative humidity and illumination
data by sending:
http://192.168.254.102/index.html?em
Websensor
EM01b HVAC Monitor
TRANSMIT POWER
Temperature, Humidity & Illumination
www.sensormetrix.co.uk
12V DC
AUX
SENSOR
LAN

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VAT Registration No. GB164 5653 45
EM01b Websensor
Instruction Manual
7
EM01b variations
There are three versions of the EM01b available. Each version has the standard light,
temperature and humidity sensor and they all operate in the same way. The EM01b
features an extra port that can be used for a several purposes hence the three
variations.
EM01b-STN
The standard EM01b has its extra port congured to sense switch opening and
closing such as that used to detect a door open or shut. This version comes with a
bare plug for the extra port for the user to wire up to.
EM01b-THM
The EM01b-THM features the extra port being used as an additional temperature
sensor and comes supplied with a temp sensor on the end of a 3 metre cable which
plugs into the extra port.
EM01b-VLT
The EM01b-VLT uses the extra port to measure DC voltage from 0-18V. This is most
often used to monitor UPS batteries. This version comes with a bare plug for the
extra port for the user to wire up to.
See websensor inventory page for parts included with each EM01b.
What’s included with each EM01b
Included with the EM01b Websensor are the following items:
Quantity Description
1Websensor EM01b Module [See gure 3]
1Wall Transformer suitable for all countries with all country adaptors and
110 – 240 VAC
1Ethernet straight-thru cable for connection to an Ethernet Hub (Blue
cable) [See gure 5]
1
Ethernet crossover cable for direct connection to a Network Interface
Card on a PC (RED cable with YELLOW boots or solid GRAY) [See
gure 6]
1Connector (plug) for contact closure – voltage sense versions
(EM01b-STN and EM01b-VLT) [See gure 7]
1 Quickstart guide
13M thermistor cable and plug for extra temperature sensor version of
EM01b only (EM01b-THM) [See gure 8]

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VAT Registration No. GB164 5653 45
EM01b Websensor
Instruction Manual
8
Websensor Inventory
Figure 3. EM01b Websensor Figure 4. Wall Power Supply
Figure 5. Straight Patch Cable Figure 6. Crossover Cable
Figure 7. Contact Closure Figure 8. Additional 3m Thermistor Cable
(EM01b-THM only)

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EM01b Websensor
Instruction Manual
9
Websensor Connection
How to connect a Websensor directly to a PC
To congure and use a Websensor it must be connected to a PC via an Ethernet
cable as shown in either gure below.
If connecting directly to a PC, a crossover type Ethernet patch cable must be used.
A crossover type Ethernet cable has been included with the Websensor. It is a solid
GREY cable with BLACK connectors.
Figure 9. Websensor connected directly to the NIC in a PC
Connecting to a PC through a hub or directly to a LAN
If connecting to a PC through a HUB, a “straight” type Ethernet patch cable must be
used between the HUB and the Websensor. A “straight” type Ethernet patch cable is
also included with the Websensor; it is the BLUE patch cable.
Figure 10. Websensor connected through a HUB to the NIC in a PC
Websensor
EM01b HVAC Monitor
TRANSMIT POWER
Temperature, Humidity & Illumination
www.sensormetrix.co.uk
12V DC
AUX
SENSOR
LAN
Ethernet Connection
Ethernet Connection
Websensor
EM01b HVAC Monitor
TRANSMIT POWER
Temperature, Humidity & Illumination
www.sensormetrix.co.uk
12V DC
AUX
SENSOR
LAN

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Basingstoke Road
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EM01b Websensor
Instruction Manual
10
Connecting the Websensor
The gures below depict the locations of the connectors for the Ethernet, 12VDC
power and Esbus connectors.
Figure 11. Ethernet (RJ-45) & Power Connectors Figure 12. Esbus Connector (RJ-45)
Esbus for connecting up to 7 other accessories:
• ES11 Flood Monitor
• ES01 Visual Temp Display
• ES02 Main Power Monitor (not yet available)
• EShub – hub for connecting more than one accessory to an EM01b
Check www.sensormetrix.co.uk for specication of the above.
Figure 13. Thermistor, Voltage Measurement and
Contact Closure output connector
Figure 14. Location of RESET PUSHBUTTON

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EM01b Websensor
Instruction Manual
11
Quickstart
□Set PC Network IP address to 192.168.254.10, Subnet to 255.255.254.0 and
Gateway to 192.168.254.102
□Connect the power supply to the Websensor
□Connect crossover cable from the PC to Websensor Ethernet port.
□Switch on power at mains outlet.
□Both front face LEDs will ash twice with the amber power LED staying on
permanently and the green transmit LED going out.
□The Websensor is now ready to communicate with the PC.
□Test communication to the websensor by using the ‘ping’ command at an
MSDOS prompt (ping 192.168.254.102 return) and the default IP address of the
websensor.
Default IP address – 192.168.254.102
□If unsuccessful response – press reset button on the side of the websensor for 10
seconds until the two LEDs ash twice and the amber LED stays lit with the green
LED extinguishing. Leave the Websensor for a few seconds to settle down and try
‘re-pinging’.
□After successful communication with the ‘ping’ command try retrieving information
from the Websensor by typing in the following command on the PC’s web
browser:-
http://192.168.254.102/index.html?em
This is asking the Websensor for temperature, light and humidity information and
will show a reply string similar to image over page.

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EM01b Websensor
Instruction Manual
12
TC = temp
HU = humidity
IL = illumination
Your Websensor is now fully functioning and is ready for you to programme to your
requirements. Continued below.
HELPFUL HINT: Prior to assigning the Websensor’s IP address, it may prove useful
to conrm that the IP address chosen for Websensor is not being utilized by another
device on the network. This is easily checked by pinging the selected address on the
network that the Websensor will be connected to, prior to connecting the Websensor
to the network.

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EM01b Websensor
Instruction Manual
13
Programming the IP Address
Programming the IP address
Programming your chosen IP address into the Websensor is performed by using the
browser to issue the following command:
http://192.168.254.102/index.html?eipaaabbbcccddd, where aaabbbcccddd is
the new IP address of the Websensor.
For example, suppose the new address to be assigned to the Websensor is
192.168.10.20. The command to perform this change is:
http://192.168.254.102/index.html?eip192168010020
As the new address is entered, each octet must have three digits.
After programming is complete, the command to access the Websensor would be:
http://192.168.10.20/index.html?em
NOTE: Once the command to change the IP address is issued the Websensor will
automatically reset itself. After the reset process completes, the new IP address will
be in effect.

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EM01b Websensor
Instruction Manual
14
Default Settings
Resetting the Websensor’s settings to default
To reset the Websensor settings to the default value perform the following steps:
1. Locate the small hole on the side of the Websensor (see PIC below).
2. Use a small object like the end of a straightened paper clip to gently press the
reset button only until both LEDs on the Websensor start to ash.
Once the reset is completed the Websensor will be set to a default IP address of
192.168.254.102. From this address the User can congure the IP address of the
Websensor to the desired value.
Figure 15. Location of the RESET button on the Websensor.
How to recognize a Websensor RESET
When a Websensor resets (initializes) the following LED lighting sequence will occur:
• Only the amber POWER LED will be on for approximately 5 seconds
• Both (amber) POWER and (green) TRANSMIT LEDs will extinguish for
approximately 5 seconds.
• Both POWER and TRANSMIT LEDs will ash two (2) times as the Websensor
“resets”.
• Finally, only the POWER LED will remain ON.

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EM01b Websensor
Instruction Manual
15
Programming the IP Address
NOTE: To address concerns over security issues, the IP address can be changed
only one (1) time per RESET. The address can be changed multiple times, but only
once after pressing the RESET BUTTON. For example, if the User changes the IP
address from the default value to another value such as 192.168.10.20, it will be
necessary to press the RESET button and restore the default value before a different
IP address can be entered.
FAQs regarding IP address changes
:QWhat if I forget what IP address is programmed into a Websensor, is there anyway
to retrieve it?
:AThere is no command that can be issued to a Websensor that will cause the
Websensor to reveal its assigned IP address. If the assigned IP address is
forgotten, the only recourse is to press the reset button for ten seconds, thus
restoring the default IP address of 192.168.254.102.
:QWhy can’t I read the Websensor’s new programmed IP address?
:AThe most likely reason is that the IP address on the NIC (network interface card)
on the PC used to programme the Websensor is outside the IP address Class of
the new IP address programmed into the Websensor.
For example, if 192.168.254.102 (default IP address) is used to program the
Websensor and the new IP address is something like 141.123.6.10, it would be
necessary to change the IP address of the NIC card to the 141.123.X.X subnet.
Once the IP address used by the PC is changed to the same subnet/class as the
Websensor, there should be no problems communicating with the Websensor.

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EM01b Websensor
Instruction Manual
16
Units of Temperature
Selecting units of temperature to be reported
To establish the units in which temperature is reported, either Fahrenheit or Celsius,
perform the following:
For temperature in Fahrenheit use the browser to send this command,
http://192.168.254.102/index.html?etpF
For temperature in Celsius use the browser to send this command,
http://192.168.254.102/index.html?etpC
NOTE: The temperature unit selection setting applies to both the temperature sensor
provided with the Websensor and the thermistor temperature readings.

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EM01b Websensor
Instruction Manual
17
Testing the IP Address
Once the Websensor has been congured, it is a good idea to conrm the IP address
selected during the conguration process has been properly entered. One way to do
this is to “ping” it.
Connect the Websensor to a PC via an Ethernet cable as shown on Page 9.
Open a Window with an MSDOS “Command Prompt”.
START > ACCESSORIES > COMMAND PROMPT
In the “Command Window” type the IP address you entered in conguration Step 1.
In this example we are using the websensor default address 192.168.254.102
ping 192.168.254.102
The IP address shown in the example is only for example. The IP address entered
during conguration should be used for this test. See the Command Window.
Figure 16. Command Window

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EM01b Websensor
Instruction Manual
18
Testing the Websensor’s IP address
If the IP address has been congured and is working properly, the replies received
should look like those shown in the “Command Prompt Window”.
If the response shown in the command prompt screen is “not received”, please refer
to the “Troubleshooting Websensor” section in the appendices.
Testing the Websensor’s IP address
Once you are able to successfully “ping” the Websensor, it is time to try a http:
request for some “live” data. To issue a request, start your internet browser (Internet
Explorer / Netscape). In the URL address eld enter the following address:
http://192.168.254.102/index.html?em
Note: For purposes of explanation the IP address 192.168.254.102 is being used.
However, the USER should enter the IP address that was programmed into the
Websensor during the conguration step.
Once the URL is entered, press the “ENTER” key and the Websensor should
acknowledge with a response. The response you see will be similar to what is shown
on the browser screen depending on which features are enabled (see below). The
information returned starts with “E01” signifying that the response is from an EM01b
Websensor. The next several bytes have to do with “check-sum”. “TC:” begins the
temperature reading, “HU” is the humidity reading and “IL” is the illumination value.
Figure 17. BROWSER SCREEN response from the HTTP: request

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EM01b Websensor
Instruction Manual
19
Websensor’s Tail
The EM01b Websensor has a tail. Functionally, the tail is the sensor which measures
temperature and relative humidity. The reason for the tail is to move the temperature
sensor outboard of the EM01b enclosure so that any heat emitted by the EM01b
electronics, will not skew the temperature/relative humidity measurements.
Note: Websensor was designed to measure “air temperature”. Websensor’s tail
should not be immersed in any liquid.
Figure 18. Websensor’s tail (temp/RH sensor).

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EM01b Websensor
Instruction Manual
20
Additional Websensor Functions
Websensor now offers three (3) new functions to the User, however only one of the
three can be used or programmed into the Websensor at any one time. One of the
three functions should be specied at the time of purchase as only one of the functions
can be congured because all three functions utilize the same port on the Websensor
and each one requires a specic modication to the Websensor hardware.
The Websensor will come pre-congured pending which function is selected. If no
function is specied then the Websensor will come with the ‘Contact Closure’
option congured.