Vega Absolute M-BUS-2 User manual

www.vega-absolute.ru
LORAWAN CONVERTER
M-BUS-2
User Manual

M-BUS-2 / User Manual
2 Revision 09 - 06 July 2021
Document Information
Title M-BUS-2 LoRaWAN converter
Document type Manual - Translation from Russian
Document number V02-MBUS2-01
Revision and date 09 – 06 July 2021
This document applies to the following products:
Product name Type number
End devices M-BUS-2
Revision History
Revision Date Name Comments
01 20.12.2017 KEV Document creation date
02 06.04.2018 TII Supported connected devices list, transparent mode is
not supported, minor changes
03 10.08.2018 KEV
Changes in the device logic, frequency plans are added,
changes in the communication protocol, in technical
characteristics, new supported meters are added
04 06.11.2018 KEV Typo in specification is fixed, list of supported heat
meters is refreshed
05 01.07.2019 KEV
Changes in the communication protocol, in
specification, settings by the air described, added
“Marking” part, communication periods changed, device
AppEui changed
06 15.04.2020 KEV We corrected the table with ID settings and some minor
changes
07 14.09.2020 KEV Settings packet type changed to 00, Landis Gir removed
from the list of supported devices
08 03.02.2021 KEV The number of warranty packets is changed, we remove
AppEui number from specification

M-BUS-2 / User Manual
3
Revision 09- 06 July 2021
09 06.07.2021 PKN
The list of supported metering devices, volume of
memory for accumulation of packages and warranty
conditions are changed; support of poll at difference
types of metering devices and new mode of universal
poll are add.

M-BUS-2 / User Manual
4 Revision 09 - 06 July 2021
CONTENTS
INTRODUCTION......................................................................................................................................................................... 6
1 DESCRIPTION AND OPERATION ......................................................................................................................................... 7
Device description ................................................................................................................................................................. 7
Comunication and data collection algorithm .................................................................................................................. 7
Functional ................................................................................................................................................................................ 8
Marking .....................................................................................................................................................................................8
2 SPECIFICATION .......................................................................................................................................................................9
3 OPERATION............................................................................................................................................................................10
Contacts .................................................................................................................................................................................10
Initial startup..........................................................................................................................................................................11
Converter operation in the independent poll mode of the metering devices ........................................................ 12
Converter operation in the universal poll mode............................................................................................................13
Connecting via USB ............................................................................................................................................................. 13
4 VEGA LORAWAN CONFIGURATOR...................................................................................................................................15
Interface of the application ................................................................................................................................................15
Connection to the device ...................................................................................................................................................16
“Device info” tab ...................................................................................................................................................................17
“LoRaWAN settings” tab ......................................................................................................................................................19
«MBUS-2» TAB...................................................................................................................................................................... 23
CONVERTER OPERATION IN THE UNIVERSAL POLL MODE ......................................................................... 25
5 COMMUNICATION PROTOCOL – 1.1 VERSION .............................................................................................................28
Converter M-BUS-2 transmits the following types of packets ...................................................................................28
1. Packet with current readings from connected heat meter ...................................................................................28
2. Packet with data from connected M-BUS device in universal poll mode ........................................................... 29
3. Packet with time correction request.......................................................................................................................... 29
4. Settings packet...............................................................................................................................................................30
Converter M-BUS-2 receives packets of the following types .....................................................................................31
1. Real-time clock adjustment ........................................................................................................................................ 31
2. Packet with request of settings................................................................................................................................... 31
3. Packet with settings is identical to such packet from device ................................................................................31

M-BUS-2 / User Manual
5
Revision 09- 06 July 2021
6 STORAGE AND TRANSPORTATION REQUIREMENTS ................................................................................................... 33
7 CONTENT OF THE PACKAGE .............................................................................................................................................34
8 WARRANTY.............................................................................................................................................................................35

M-BUS-2 / User Manual
6 Revision 09 - 06 July 2021
INTRODUCTION
This manual is designated for M-BUS-2 device (hereinafter – device, converter)
manufactured by Vega-Absolute OOO and provides information on powering and activation
procedure, control commands and functions of the device.
This manual is targeted at specialists familiar with installation work fundamentals for
electronic and electrical equipment.
To provide the stable radio between the gateway and the end device it
is recommend avoiding the device installation in the places which are
barriers for the radio signal getting through like a reinforced floors and
walls, a basement, an underground facilities and wells, a metal case etc.
The necessary stage for the network deploying including a big quantity
of end devices is a radio planning work with nature experiments
Vega-Absolute OOO reserves the right to make changes to the manual related to the
improvement of equipment and software, as well as to eliminate typos and inaccuracies,
without prior notice.

M-BUS-2 / User Manual
7
Revision 09- 06 July 2021
1 DESCRIPTION AND OPERATION
DEVICE DESCRIPTION
The device M-BUS-2 is designed for reading of values from metering instruments via
M-BUS interface and further accumulating and transmitting of this data to the LoRaWAN
network.
Converter M-BUS-2 can be used for any utilities’ meters and industrial equipment with
M-BUS interface including water-, electricity-, and heat meters. M-BUS-2 may operate in the
universal poll mode by custom commands. Also, M-BUS may operate in the independent poll
mode of the metering devices converter only with the next supported devices:
•Heat meter «Teplouchet-1»
•Heat meter «STE 21 «Berill»
•Heat meter «ELF-M Teplovodomer»
•Heat meter Landis Gyr T230
•Heat meter Sharky 775
•Heat meter Pulsar
•Heat meter Calec ST II
•Heat meter Calec ST II_2
•Heat meter Sensonic II
•Heat calculator ZENNER_MULTIDATA_WR3
•Heat meter “Pulse STK-15”
•Heat meter “Hiterm PUTM-1”
The converter is powered by a 6400 mAh built-in battery.
Quantity of connecting M-BUS devices to the converter is up to 10 at the same time.
Starting with firmware version 2.0 and higher, M-BUS-
1 supports
simultaneous connection of metering devices of different models and
manufacturers
The converter is configured via USB using the special «Vega LoRaWAN Configurator»
software.
COMUNICATION AND DATA COLLECTION ALGORITHM
The readings collecting from the meter with a configurable period from 5 minutes to
24 hours. The readings stored in the device memory and transmitting during the next
communication session with the LoRaWAN network.

M-BUS-2 / User Manual
8 Revision 09 - 06 July 2021
The adjustable data transfer period can be from 5 minutes to 24 hours. Data
transferring in random point in time during set period. At the next communication session, the
device starts sending accumulated packets with readings, from the earliest to the latest.
With the "Confirmed uplinks" option turned on, the device will send the next packet
only after receiving a confirmation of the delivery of the previous one. If such confirmation
has not received after the fulfilled in the settings uplink number of transmissions, device
completes the communication session until the next one according to the schedule. In this
case, the device continues to collect data according to the data collection period and store it
in memory. Non-transmitted packets remain in the device memory until the next
communication session.
With the "Confirmed uplinks" option turned off, the device just sends all accumulated
packets to the network in order from the earliest to the latest. There are no checks of package
delivery in this mode. There are no non-transmitted messages in the device memory.
The internal clock is set automatically when device connected to the "Vega LoRaWAN
Configurator" via USB, also adjustable via LoRaWAN.
FUNCTIONAL
M-BUS-2 converter is A class device (LoRaWAN classification) and has the following
features:
oADR support (Adaptive Data Rate)
oSending of confirmed packets (configurable)
oTemperature measurement by the internal temperature sensor
oCharge measuring of the built-in battery (%)
MARKING
Device marked with sticker that contain the next information:
oDevice model;
oDevEUI;
oMonth and year of manufacture.
Sticker located in three places – on device case, in factory certificate and on the packing
box.
Besides, there is an additional sticker located on the packing box and contains:
oInformation about firmware version;
oQR-code containing DevEUI and keys for device registration in network via OTAA
method.

M-BUS-2 / User Manual
9
Revision 09- 06 July 2021
2 SPECIFICATION
Main
M-BUS interface 1
Quantity of connecting M-BUS devices up to 10
USB-port mini-USB, type B
Operating temperatures -40…+85 °С
LoRaWAN
LoRaWAN class A
Quantity of LoRa channels 16
Frequency plan
RU868, EU868, IN865, AS923, AU915,
KR920, US915, KZ865, custom (EU868
based)
Activation type ABP or OTAA
Communication period 5, 15, 30 minutes, 1, 6, 12 or 24 hours
Data collection period
5, 15, 30 minutes, 1, 6, 12 or 24 hours
Memory amount for storing packets 100 packets
Antenna connector SMA
Sensitivity -138 dBm
Radio coverage in restrained urban conditions max 5 km
Radio coverage within line of sight max 15 km
Transmitter power by default
25 mW (configurable)
Power
Built-in battery 6400 mAh
Calculated number of packets sent by the
device, not less
15 000
Case
Housing dimensions 104 х 95 х 29 mm
Ingress protection rating IP54
Mounting with screws

M-BUS-2 / User Manual
10 Revision 09 - 06 July 2021
3 OPERATION
CONTACTS
Converter has 12 contact pairs which are M-BUS interfaces. Converter provide
connection up to 10 M-BUS devices. You can choose any 10 contact pairs. Wherein 1-2
contacts are M-BUS- (bot row), and 13-24 contacts are M-BUS+ (top row).
In order to increase the battery life, the physical level of the M-BUS interface is switch on
(supply voltage is applied to the outputs MBAS +, MBAS-) just before meter polling with a
programmable delay (the delay value is depends on the type of connected meter). The delay is
introduced for initializing own meter interface and its preparing for receiving data from the
converter. When the polling is complete, the physical M-BUS level is turned off.
There is SMA connector for an external antenna connection on the board.
SMA connector for
an external
LoRaWAN antenna
connection

M-BUS-2 / User Manual
11
Revision 09- 06 July 2021
INITIAL STARTUP
The M-BUS-2 converter is powered from the built-in battery. In case of disconnect
battery, you need to connect the battery to the one of the two power connectors on the board.
The converter supports two activation methods in the LoRaWAN network - ABP and
OTAA. Select one of the methods using “Vega LoRaWAN Configurator” application (See part 4).
1. ABP.After pressing the start button, the device immediately starts working in the
"Active" mode.
Power connectors

M-BUS-2 / User Manual
12 Revision 09 - 06 July 2021
2. OTAA.After pressing the start button, the device makes three attempts to connect to
the network within the set frequency plan. After the activation in the LoRaWAN network is
confirmed, the device sends a signal (LED flashing for 5 seconds) and switches to the "Active"
mode. If all attempts fail, the converter will continue to accumulate data and will attempt to
connect to the network every 6 hours.
To transfer the device from the "Active" mode to the "Storage" mode, you can use the
long press of the start button (more than 5 seconds).
Before connecting the device to the network, make sure that its registration
data is entered in the network - Device EUI, Application EUI and Application
Key for OTAA, or Device address, Application session key and Network
session key for ABP
CONVERTER OPERATION IN THE INDEPENDENT POLL MODE OF THE METERING
DEVICES
In the independent poll mode, the converter periodically and consistently polls the
metering devices at their secondary addresses. The addresses of the polling devices are writting
to the converter using the "Vega LoRaWAN Configurator" application. In case of a successful
poll, the data transferred by the metering device is accumulated in the configurator memory
Press the start
button located on
the board

M-BUS-2 / User Manual
13
Revision 09- 06 July 2021
and sent to the LoRaWAN network in accordance with communication period. The
communication period can be set in the "Vega LoRaWAN Configurator" application while
converter connected to a computer.
CONVERTER OPERATION IN THE UNIVERSAL POLL MODE
In the universal polling mode through configurator the user can set transmitted
commands, progression of their transfer, intervals of transfer, timeout of waiting answer.
Metering device’s answer is packaged in “black box” and in accordance with period of data
transfer. The user can ban to pack of metering device’s answer, if, e.g., the answer on some
command is need not to transfer.
By default, the universal polling mode is disabled, you can activate it using the Vega
LoRaWAN Configurator program on the device tab 1(look at chapter «Vega LoRaWAN
Configurator»).
Activation of the universal poll mode leads to the blocking of
independent polling of supported metering devices
CONNECTING VIA USB
The device M-BUS-2 adjusted with the "Vega LoRaWAN Configurator" application (See
part 4).
1The described functionality is supported in the Configurator version 1.0.55 and higher.

M-BUS-2 / User Manual
14 Revision 09 - 06 July 2021
Before connecting the device to the computer for the first time, you must install the
driver for the COM port stsw-stm32102, which can be downloaded from iotvega.com. After
running the executable file VCP_V1.4.0_Setup.exe, the installer window will appear:
In this window, you need to click Next, then Install, and then the installation will begin.
When the installation is completed successfully, the following screen appears:
After pressing Finish the driver is ready for operation, - it is possible to connect the
converter via USB.

M-BUS-2 / User Manual
15
Revision 09- 06 July 2021
4 VEGA LORAWAN CONFIGURATOR
The "Vega LoRaWAN Configurator" application (hereinafter referred to as the
configurator) is intended for setting up the device via USB.
The configurator has two modes of operation - "Simple" and "Expert". In the "Simple"
mode, only basic settings are available. In the "Expert" mode, the basic settings, advanced
settings and the ability to check the coverage area of the signal from the gateways are available.
Next, the work of the application is considered in the “Expert” mode.
INTERFACE OF THE APPLICATION
The "Vega LoRaWAN Configurator" application does not require the special installation.
When the executable file is launched, the window for working with the application appears.
The menu on the left allows you to switch between the “Simple” and “Expert” modes,
select the device model, connect to the device or disconnect from it, get and apply settings.

M-BUS-2 / User Manual
16 Revision 09 - 06 July 2021
The application window contains three tabs – Device info, LoRaWAN settings and device
settings.
The language selection menu is in the upper right corner.
CONNECTION TO THE DEVICE
For the connection to the device, perform the following steps:
1. Connect the USB cable to the device.
2. Start the "Vega LoRaWAN Configurator" application.
3. Click the "Connect" button in the menu on the left.
The application automatically recognizes the device model, and the device selection
menu becomes inactive.
To read the settings from the device, you need to click the "Get settings" button, until
this point the application will display the default settings or from the last connected device.
After making the necessary changes to the settings, you should click the "Apply settings"
button and only then disconnect from the device with the "Disconnect" button.

M-BUS-2 / User Manual
17
Revision 09- 06 July 2021
“DEVICE INFO” TAB
The "Device info" tab displays information about the device, its current status, and also
the data needed to register the device in the LoRaWAN network.
ABP info - displays the data necessary to register the device in the LoRaWAN network
with ABP method (Activation By Personalization).
OTAA info - the data required to register the device in the LoRaWAN network with OTAA
method (Over The Air Activation) is displayed.
Key management (not displayed in the "Simple" mode) - allows you to change the
factory keys to register the device on the network and reset the keys back to the factory
settings.
Device info - the configurator reads information about the device model, its firmware
and automatically corrects the device's time when connected to it.

M-BUS-2 / User Manual
18 Revision 09 - 06 July 2021
Update firmware - allows you to select the firmware file from your computer's hard
drive and load it into the device. The device will automatically disconnect from the configurator
when the download is complete. The current version of the device firmware can be
downloaded from iotvega.com.
Network info - shows whether the device is connected to the LoRaWAN network and
its network address.
Join network button - launch the LoRaWAN network connection procedure with the
previously selected ABP or OTAA method. If the device is already connected to the network,
reconnection procedure will occur.
Link check (not displayed in the "Simple" mode) - when pressed, the device sends a
special signal to the LoRaWAN network, in response to which the network informs it of the
number of gateways that received this signal and the signal quality. This button only works
when the device is connected to the network.
Device output (not displayed in the "Simple" mode) - monitoring the device status, all
events in real time are displayed.

M-BUS-2 / User Manual
19
Revision 09- 06 July 2021
“LORAWAN SETTINGS” TAB
The "LoRaWAN Settings" tab allows you to configure various parameters of the LoRa
network.
Region - allows you to select one of installed frequency plans or specify a custom
frequency plan. Custom frequency plan is EU-868 based.
The converter supports the following frequency plans:
Frequency plan
2
Channel
Frequency
Modulation
EU-868
1 868.1 MultiSF 125 kHz
2 868.3 MultiSF 125 kHz
3 868.5 MultiSF 125 kHz
RX2 869.525 SF12 125 kHz
RU-868
1 868.9 MultiSF 125 kHz
2 869.1 MultiSF 125 kHz
RX2 869.1 MultiSF 125 kHz
Custom
Set with «Vega LoRaWAN Configurator» application
In the EU_868 and RU_868 frequency plans, only those channels are active by default,
on which sending requests for connection to the network (join channels). The remaining
channels (that the device should use) can be transferring by the LoRaWAN network server
during the device activation procedure (only OTAA).
2By default, the device supports two frequency plans and the custom, but it is possible to order firmware for
other frequency plans: IN865, AS923, AU915, KR920, US915, KZ865

M-BUS-2 / User Manual
20 Revision 09 - 06 July 2021
If you select "Custom" in the "Region" field, you must manually specify the frequencies
that the device will use. To do this, click the "Edit" button, the channel frequency editing
window will appear:
This frequency plan allows you to set up to 16 channels, as well as the frequency and
speed of the second receiving window.
The first three channels and the second receiving window parameters
are mandatory. Without these parameters the custom frequency plan
will be considered empty
Activation type – selecting ABP or OTAA device activation method.
Confirmed uplinks – when you choose "confirmed", the device will retry sending the
packet until it receives the server confirmation, or until the "Uplink number of transmission" is
over (see below).
If you choose to send a packet without confirmation, the modem will
not know whether the packet is delivered or not
ADR – this option activates the Adaptive Data Rate algorithm for automatic control of
the data transfer rate from the LoRaWAN network server side. The higher the quality of the
signal received by the network, the higher the speed will be installed on the device. This option
is recommended only on permanently installed devices.