WAVIOT BT-100 User manual
NB-Fi MODEM
MODEL BT-100
DATASHEET & USER GUIDE
NB-Fi modem BT-100
Rev 7 –August 2022
Page 1 of 18
Table of Contents
Table of Contents ..................................................................................................................1
1. Introduction.....................................................................................................................2
2. Technical characteristics for NB-Fi modem BT-100 .......................................................3
3. Installation......................................................................................................................5
Safety Warnings.......................................................................................................5
Installation ................................................................................................................5
3.2.1. Checking the NB-Fi connectivity ........................................................................5
3.2.2. Checking the operability of the water meters.....................................................6
3.2.3. Installation procedure for modems.....................................................................6
3.2.4. Adding BT-100 modem with connected water meters to the MDM system......10
4. Packing list...................................................................................................................16
5. Warranty statement......................................................................................................17
6. Contact Information......................................................................................................18
Installation report template for NB-Fi modem........................................................................1
NB-Fi modem BT-100
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1. Introduction
WAVIoT is an innovator in low-power wide-area network (LPWAN) technologies that power
the M2M telemetry and Internet of Things. WAVIoT uses the NB-Fi standard that is based on
Narrow Band radio technology and operates in the license-free Sub-1 GHz frequency bands.
WAVIoT devices connected to the WAVIoT IoT Platform via the NB-Fi protocol use
significantly less power and operate over larger distances compared to other wireless
technologies which require more power and work best in short range. Numerous devices
send data through bi-directional NB-Fi base stations. The base stations then detect,
demodulate and transfer received messages to the WAVIoT Head-End System (HES) which
is a part of the WAVIoT IoT Platform. WAVIoT Meter Data Management (MDM) system is a
WAVIoT IoT Platform application that requests or collects, validates and processes data (e.g.
consumption data or events and alarms) and shares it with suppliers, utility management
companies and consumers. The HES and MDM systems have API that allows exchanging
data with the customer applications such as billing systems, customer care systems and
solutions for data analytics.
Plug-and-play IoT devices, NB-Fi modems with pulse, ADC or RS-232/485 inputs and high-
performance bi-directional base stations allow deploying NB-Fi networks for IoT applications
rapidly (sometimes within hours) in any part of the world. WAVIoT technology and the NB-Fi
standard may be applied for Automated Meter Reading (AMR) systems, Advanced Metering
Infrastructure (AMI) solutions, wireless alarm and security systems, industrial monitoring and
control, smart agriculture and other wireless sensor network solutions.
The WAVIoT team has extensive practical experience in the rollout of large systems with
hundreds of NB-Fi devices within a single project, and as a result, all our R&D activities are
focused on the challenges that we meet in numerous use scenarios.
This document describes the WAVIoT Water Meter and also provides a general overview of
WAVIoT technology and the NB-Fi standard for IoT communication.
NB-Fi modem BT-100
Rev 7 –August 2022
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2. Technical characteristics for NB-Fi modem BT-100
General characteristics
Dimensions (height ×width ×depth)
200 ×45 ×48 mm
Weight
0.195 kg
Material of the case
ABS
Connectors
By request:
−two pairs of pulse inputs, for dry (volt free) contacts
−open collector
−RS-485
−RS-232
Input voltage data
Battery
D-size Li-Ion battery, 19000 mАh
Battery voltage
up to 3.6 V
Long Range Communications
Wireless protocol
NB-Fi
Network topology
Star
Frequency
868.1 MHz (for Europe)
adjustable, 860-925 MHz (for other countries)
Maximum RF TX Power
14 dBm (25 mW), duty cycle 1%
Remote readings
custom intervals from 1 minute (once an hour by
default)
Distance range
Up to 10 km (urban), up to 30 km (rural)
Data encryption
AES-256
Modulation type
DBPSK
Data rate
50, 400, 3200, 25600 bit/s
Maximum data transfer per 24 h
20 Mbit
NB-Fi modem BT-100
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Ambient conditions
IP Rating
IP67
Ambient temperature (operation)
from -40°C to +60°C
Ambient humidity (operation)
≤ 95% (at 25°C, non-condensing)
Certification
Electromagnetic compatibility
Radio Equipment Directive (RED) 2014/53/EU
Figure 1 –NB-Fi modem BT-100
We are continuously developing the technology used within our product range delivering
outstanding innovative solutions, therefore the specification may change from time to time.
NB-Fi modem BT-100
Rev 7 –August 2022
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3. Installation
Safety Warnings
This device must be installed by a trained professional installer only. Please read all safety
warnings before commencing an installation.
Electrical Power Warning
Do not locate device near overhead power lines or other electric light or power circuits, or
where the device can come into contact with such circuits.
Installation
NB-Fi modem BT-100 is a radio device capable of transmitting in the unlicensed frequency
bands. Because the NB-Fi modem operates in the unlicensed radio frequency bands it is
susceptible to interference that can reduce throughput and range.
This section describes the installation of the NB-Fi BT-100 pulse modem on the pulse outputs
of water meter and adding it to the WAVIoT MDM system.
One NB-Fi modem BT-100 with pulse interface has two pairs of dry contacts, so you can
connect up to two water meters to this modem (for example, water meters for cold and hot
water).
3.2.1. Checking the NB-Fi connectivity
WAVIoT NB-Fi modemBT-100 is a radio device capable of transmitting data in the unlicensed
frequency bands.
Because the WAVIoT NB-Fi BT-100 operates in the unlicensed radio frequency bands, it is
susceptible to interference that can reduce throughput and range. Follow these simple
guidelines to optimize product performance:
•Install the WAVIoT NB-Fi modem BT-100at a place that with a clear line-of-sight signal
path
•Install the WAVIoT NB-Fi base station and antennas in an area where structures,
trees, or hills do not obstruct radio signals from the modem
Ensure that installation area is covered by WAVIoT NB-Fi base station. Check the
connectivity by manual sending of a test message from the NB-Fi modem and check if the
data appears in the WAVIoT MDM system.
To senda test message from the NB-Fi modem, bring the modem directly to the point
of installation, attach a magnet (preferably a neodymium magnet) to the button with
the gear icon on the body. Ensure that the light indicator is flashing –that means that
NB-Fi message is sending.
Go to https://mdm.waviot.com/flow/ to check for a message from the modem. If the
NB-Fi modem BT-100
Rev 7 –August 2022
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modem is in the area of NB-Fi coverage, two messages will be received with a
payload, starting with numbers 59 and 51.
Alternatively, check for the messages in the WAVIoT Head-End System, at
https://hes.waviot.com/reports/bsmessages/. It could be helpful if you use the NB-Fi
modems for other applications but utility meters.
This functionality is available only for the owners of the modems or utility
management companies who provide the installation service.
3.2.2. Checking the operability of the water meters
Switch on hot and cold water in turn, check the operability of water meters
(mechanical counter wheels are rotating), and identify which meter is related to hot
water and which one to cold water.
To check the operability of the water meter pulse outputs, a multimeter must be
connected by setting the switch to the resistance measurement mode (buzzer mode)
in advance. This mode is usually marked by the "Diode" icon on the multimeter. Next,
turn on the water (with a non-installed meter, set the meter wings in motion with air
flow –imitation of water supply).
The reed contacts should close and the tester should display "0". If the water meter
reed switch is inoperable, "0" value will not be displayed on the multimeter.
Turn off the water in the taps so that the meters don't change the readings.
3.2.3. Installation procedure for modems
Fill in the Installation report with the modem number, name, modification, serial
number and resource type (cold water or hot water) of each water meter, current
meter readings and current time (time shall be specified down to one minute!), and
also pulse value printed on the water meter’s face plate, which indicates the output
value per pulse (i.e. pulse value = 1 that’s 1 pulse = 1 liter). If pulse value is absent
or unknown, the only way to know this value is to calibrate the NB-Fi BT-100 modem
(see p. 3.2.3.3) and then calculate the Pulse value factor based on the calibration
results (see p. 3.2.4.8).
Install the modem on the meters. For installation, the pair of pulse outputs of the
meters must be connected to the pair of the pulse inputs on the modem.
Modem calibration means synchronization of counted pulses with the number of
spilled liters transmitted to the WAVIoT MDM system. To start the modem calibration,
attach a magnet to the button with the gear icon on the body and wait for EXACTLY
5 flashes of the red light on the body.
Fill in the Installation report with the readings from the connected water meters at the
start of calibration. This is necessary for the proper setting of the initial readings for
the water meters in the WAVIoT MDM System.
After that the modem calibration starts, and the modem will send one or two
"Calibration" messages (depending on the number of data channels) and then up to
10 information messages for each data channel that used for Modem calibration and
also for evaluation of the connectivity stability.
After step 3.2.3.3, turn on hot and cold water at a good pressure so that at least 10
pulses are generated (for residential water meters with pulse value = 1 this means
10 liters of water which will pour out for 3 minutes). This step is important for the
correct calculation of the Pulse value factor.
NB-Fi modem BT-100
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Go to https://mdm.waviot.com/flow/ page 30-60 seconds after the calibration starts,
enter the modem number and make sure signals from the modem reach the server.
Check the Iterator, NSNR and RSSI values to evaluate the NB-Fi network coverage
quality.
3.2.3.5.1. Description of the Flow page
The flow page contains all messages received from the device.
Below is the description of columns of the flow page.
Column
Description
#
Unique identifier of received message in the WAVIoT MDM system
Modem
Modem ID in Hexadecimal notation
Event time
Date and time of receiving the message in MDM system in user’s time
zone
Type
Type of message. For the purpose of Modem calibration, there are one
or two calibration messages needed first and then up to 10 information
messages for each data channel.
Iterator
This number is incrementing from 0 to 31 and then shifting to 0 again. If
some messaged are missing due to bad connectivity, there will be a
gap between the numbers.
When installing, close the riser door to check the connectivity in real
conditions.
You can use these Iterator values to evaluate the NB-Fi network
coverage quality.
Message
The raw data than is contained in the device’s message. For the first
data channel, the second symbol in Message text value is “1”, for the
second data channel, the second symbol in Message text value is “9”.
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Column
Description
Base station
ID number of the base station that first received the message. Check if
the required base station receives messages.
NSNR
Normalized Signal-to-Noise Ratio, the NB-Fi network quality indicator.
A stable signal can be considered with an average SNR of 30 dB or
higher.
RSSI
Received signal strength indicator, the NB-Fi network quality indicator.
RSSI is the usable strength of radio waves, expressed in decibels
between 0 dBm (strongest) and -150 dBm (weakest). Smaller negative
numbers represent a cleaner/stronger signal.
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Assemble the modem into the case, fix the modem in the riser stand with clamps,
double-sided adhesive tape, assemble and fix the hanging wires from the meters with
clamps, close the riser door. Usually it should take no more than 2 minutes.
Turn off the tap water in approx. 3-4 minutes after step 3.2.3.3. If there are no
calibration messages, perform step 3.2.3.1 by placing the modem in a different place.
Preferred location of the modem: vertically, with the cable glands facing down. The
modem in the riser stand can be moved to another corner, try the options of locating
close to and away from the metal base.
Fill in the Installation report with the readings from the connected water meters at the
end of calibration. This step is important for the correct calculation of the Pulse value
factor.
Fill the rest of fields in the Installation report. Make sure that the Pulse value factor
field is filled in properly.
Important notes
Caution: Failure to comply with some of the steps in this User guide may result in
unsatisfactory installation of the modem due to:
•Absence of signals from modem
•Failure to set proper initial meter readings at the timestamp
•Wrong Pulse value factor setting
This may result in the need to visit the facility again to properly install the modem.
Step 3.2.3.5 can only be omitted if there is 100% certainty of stable signal reception.
Switching the water on and off (steps 3.2.3.4 and 3.2.3.7) can only be skipped subject to
continuous water flow rate at the facility. In other cases, the engineer installing the modems
may fail to determine the malfunction of the devices, and may not be able to determine the
meter’s Pulse value factor after installation based on a mathematical calculation (if the pulse
value is not indicated on the device).
Missed “New meter readings” values in the Installation report will lead to a failure to determine
the meter’s Pulse value factor after installation based on a mathematical calculation (if the
pulse value is not indicated on the device).
Refer to p. 3.2.4.8 to calculate the Pulse value factor.
NB-Fi modem BT-100
Rev 7 –August 2022
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3.2.4. Adding BT-100 modem with connected water meters to the MDM system
Add the new node in the Tree View section and add a BT-100 modem to the required
node in the WAVIoT MDM system.
The BT-100 modem will appear in the Data View section for the selected node, with
two images of Cold water and Hot water meters with the small wrench icons on the
bottom left corners. Wrench icon means that initial values have to be set for each
device.
Click the “Settings” button at the top right corner of the active tab section and then
click on the “Meters management” button. The “Meters management” window will be
prompted.
NB-Fi modem BT-100
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The BT-100 modem could be used with any device with pulse outputs. If you
connected modem to a device other than water meter, click on the icon with required
resource type in “Device type” section. Then choose the unit of measurement under
the “Device type” section.
Each NB-Fi device has one or several data channels, each of them is registered by
“Registrator” in the WAVIoT MDM system. WAVIoT MDM system supports two-
channels BT-100 modem only if it is used with “Water” Device type. If other Device
type has been chosen, only one data channel is available. However, if two data
channels are required for another type of device, choose the “Water” Device type and
set the custom name for the Registrator.
Define the settings for each Registrator in the “Registrators” section.
Registrator settings
Description
Name
Custom name for the device’s data
channel.
This name will appear in Data View
section.
Channel
Data channel that will be bound to this
registration (for devices with two data
channels)
Initial date
Initial date and time of the start of data
recording from data channel.
Click on the row to prompt a window that
allows setting the date and time. You can
choose only dates when the messages
from the device have been registered in
the WAVIoT MDM system.
If other date has been chosen, the “No
messages have been registered on this
day” message will be shown.
Show
Check a box if the data channel should
be shown on the Data View section.
NB-Fi modem BT-100
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Click on the “Set the initial values” button at the top right corner of the “Meters
management” window.
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Fill the fields in the “Setting the initial values for devices” window.
Field
Description
Device name and
serial number
Enter the name and serial number of the device from the
Installation report
Pulse value factor
Enter the pulse value from the Installation report.
If this pulse value is unknown, refer to p. 3.2.4.8 to calculate the
Pulse value factor.
Initial value
Enter the device’s initial readings from the Installation report
Date
Date of setting of the initial values, by default it is the date of
calibration.
In case an adjustment of meter readings is needed, select a new
date and set the new initial value for this date. The new initial
value will be set at the date and time of the message at the
selected date.
If the meter readings data in MDM system is unsynchronized with the real values on the
meter, check the Pulse value factor, and repeat the installation procedure, if needed.
Click Save after filling in all fields. Devices connected to the WAVIoT BT-100 modem
will appear in the Data View section.
NB-Fi modem BT-100
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Manual for the calculation of the Pulse value factor based on the calibration data
1. Calculate the V volume of water poured out during calibration based on the BT-100 modem
Installation report. V = New meter readings –Initial meter readings
2. Go to https://mdm.waviot.com/flow/ and find the calibration and information messages on
the date of filling of the Installation report.
Click on the “Log” button at the calibration message and at the last information message, and
find the initial and the last value of the device's pulse counter.
If there are two data channels, open the logs for the calibration and information messages for
each data channel.
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Calculate the P number of pulses, counted during the calibration procedure:
N = Last value of device's pulse counter –Initial value of device's pulse counter
Samples of the logs for calibration and information messages for the cold water channel are
above. In the sample above, N = 1357 –1356 = 1 pulse.
3. Calculate the Pulse value factor:
Pulse value factor = V / N
Result of calculation could be inaccurate because of approximate values, taken from the
devices and filled into the Installation report. Round the result of calculation to the nearest
probably suitable number that most likely should be multiple of 2, 10 or 25 (for example,
0.1, 0.325, 1, 2, 10, 100, 640). Increase the number of pulses passed to increase the
accuracy of calculation.
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4. Packing list
The following components are included in your package:
#
Item
Quantity
Comment
1
NB-Fi modem BT-100
D
1
Required
Interface
Battery size
2
Datasheet
1
Required
Check this packing list before installation to ensure that you have received each item. If you
are missing any items, contact your supplier.
The packaging information section is filled by the manufacturer:
Packaging information
NB-Fi modem BT-100
Serial #
(factory number)
Packed by Telematics Solutions LLC.
Employee:
QA engineer
(position)
(signature)
(full name)
Date of packing:
(day, month, year)
Software and hardware versions
Hardware version
Software version
HBT100.EU.01
SBT100.EU.01
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5. Warranty statement
WAVIoT warrants to the original end user (purchaser) that the NB-Fi modem BT-100 is free
from any defects in materials or workmanship under normal use for a period of two (2) years
from the date of purchase. During the warranty period, and upon proof of purchase, if the
product fails due to faulty workmanship and/or materials, WAVIoT will, at its sole discretion,
repair or replace the defective product or components. However, when repair or replacement
is not practical, WAVIoT may, at its sole discretion elect to refund the original purchase price
of the defective product. Any replacement may consist of a new or re-manufactured
functionally equivalent product of equal value, and will be made solely at the discretion of
WAVIoT. Repaired or replaced hardware is warranted only for the remainder of the original
warranty period or 60 days from the date of replacement, whichever is longer, and is subject
to the same exclusions and limitations as the original product. Unless expressly stated
otherwise within this document, the purchaser is responsible for all shipping, labor,
installation, and other costs associated with the repair and/or replacement. All hardware or
part thereof that is replaced by WAVIoT, or for which the purchase price is refunded, shall
become the property of WAVIoT upon replacement or refund.
The following are excluded from the warranty:
•Product defects that result from improper operating, mounting, maintenance, or use of
the device
•Unauthorized modifications made by parties other than the manufacturer, of if the
original security seal have been defaced, altered, or removed
•Damages during transportation or storage
•Catastrophes caused by external influences and force majeure
•Vandalism from persons or animals
•Exposure to environmental conditions outside of the device’s rated specifications
NB-Fi modem BT-100
Rev 7 –August 2022
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6. Contact Information
Technical support
Once the NB-Fi modem BT-100 is properly installed, you may contact our technical support
for any assistance. Please use the following contact details for technical support and
All rights reserved. NB-Fi and WAVIoT are trademarks of WAVIoT Integrated Systems, LLC or its subsidiaries in the United
States and/or other countries. WAVIoT Integrated Systems, LLC owns the rights to a number of patents, trademarks,
copyrights, trade secrets, and other intellectual property.
Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may
be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof
does not convey nor imply any license under patent or other industrial or intellectual property rights.
WAVIoT Integrated Systems, LLC assumes no responsibility or liability whatsoever for any failure or unexpected operation
resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress
including, but not limited to, exposure to parameters beyond the specified maximum ratingsor operation outside the specified
range.
WAVIoT products are not designed, intended, authorized or warranted to be suitable for use as a critical component in life-
support applications, devices or systems or other critical applications. Inclusion of WAVIoT products in such applications is
understood to be undertaken solely at the customer’s own risk. Should a customer purchase or use WAVIoT products for
any such unauthorized application, the customer shall indemnify and hold WAVIoT Integrated Systems, LLC and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which
could arise.
Installation report for WAVIoT devices
Print the next page on the back side of this page
Page I
Installation report tem plate for NB-Fi m odem
Installation report No for NB-Fi modem
Filling in this Installation report is necessary to enter information about the WAVIoT device into the WAVIoT MDM system.
If you are filling in this form with the user’s personal data, you have to get from the user a written consent to the processing of
personal data in accordance with local law. The text of the Personal Data Processing Agreement is on the back of this page.
Information about Customer, WAVIoT modem, utility meters and place of installation:
City / Town / Area
Street, Building
Apartment / Office
First name
If an account is created for a Customer to access the WAVIoT MDM system
Last name
If an account is created for a Customer to access the WAVIoT MDM system
Email
If an account is created for a Customer to access the WAVIoT MDM system
Mobile number
If an account is created for a Customer to access the WAVIoT MDM system
Installation place
Modem serial number
Resource:
Cold water
Hot water
Device name
Device serial number
Pulse value
i.e. 10 l/imp or 1 l/imp
i.e. 10 l/imp or 1 l/imp
Initial meter readings
Calibration messages
Check if calibration messages from the modem exists or not
New meter readings
Installation date and
time
Day: Month: Year: Time: :
, hereinafter referred to
as the "Contractor", and the Customer confirm that devices mentioned above have been
installed.
Contractor:
Customer:
I give my consent to the processing of my personal data:
(Signature of Customer)
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