AONCIP SB020100 User manual

SMARTBRIDGE USER MANUAL
(model SB020100 RTU MODBUS to LORAWAN CONVERTER
Hardware version v02.01.00)

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
Page 1 of 38
1. CONTENTS
1. CONTENTS ................................................................................................................................................... 1
2. SAFETY PRECAUTIONS.............................................................................................................................. 2
3. OVERVIEW.................................................................................................................................................... 3
4. INSTALLATION.............................................................................................................................................. 5
4.1. Electrical diagram .................................................................................................................................. 5
4.2. Connectors ............................................................................................................................................ 5
5. COMMISSIONING......................................................................................................................................... 7
5.1. NFC connectivity ................................................................................................................................... 7
5.2. Setting LoRaWAN communication parameters ..................................................................................... 8
5.2.1. Understanding SmartBridge LoRaWAN profile class....................................................................... 8
5.2.2 LoRaWAN communication parameters ............................................................................................. 8
5.3 Modbus parameters settings .................................................................................................................11
5.3.1 Modbus serial RTU protocol overview..............................................................................................11
5.3.2. Table parameter...............................................................................................................................11
5.4. Checking the setup and establishing first communication .................................................................. 13
6. OPERATION ................................................................................................................................................ 14
6.1. Internal alarm wakeup ......................................................................................................................... 14
6.2. NFC signal detection ........................................................................................................................... 14
6.3. Modbus values request management ................................................................................................. 14
7. DATA FRAME FORMATS............................................................................................................................ 16
7.1. UPLINK FRAMES (FROM NODE TO SERVER) ................................................................................ 16
7.1.1. UPLINK 00 (Reading Modbus parameters) ................................................................................... 16
7.1.2. UPLINK 01 (Reading data type and address of the requested group of Modbus registers) ......... 18
7.1.3. UPLINK 02 (Reading slave address and function of the requested group of Modbus registers) .. 19
7.1.4. UPLINK 03 (Serial Modbus RS485 settings) ................................................................................. 20
7.1.5. UPLINK 04 (SmartBridge status) ................................................................................................... 21
7.2. DOWNLINK FRAMES (FROM SERVER TO NODE).......................................................................... 22
7.2.1. DOWNLINK 01 (Configure Type data and Modbus Address register) ........................................... 22
7.2.2. DOWNLINK 02 (Configure enable parameter, Modbus slave address device and read function) 23
7.2.3. DOWNLINK 03 (Configure Modbus RS485 settings)..................................................................... 24
7.2.4. DOWNLINK 05 (Direct Modbus command to slave) ...................................................................... 25
7.2.5. DOWNLINK 06 (Configure Uplink period) ...................................................................................... 26
7.2.6. DOWNLINK 07 (Configure Time and Date for the SmartBridge) ................................................... 27
7.2.7. DOWNLINK 08 (Next data request for uplink) ............................................................................... 28
8. TROUBLESHOOTING................................................................................................................................. 29
9. MAINTENANCE AND TECHNICAL SERVICE ............................................................................................ 30
9.1. Battery replacement procedure ........................................................................................................... 30
9.2. Firmware update.................................................................................................................................. 30
10. TECHNICAL FEATURES........................................................................................................................... 32
11. PRODUCT REGULATIONS....................................................................................................................... 34
12. TRADEMARKS.......................................................................................................................................... 35
13. GUARANTEE ............................................................................................................................................ 36
14. DOCUMENT HISTORY ............................................................................................................................. 37
15. CONTACT INFORMATION........................................................................................................................ 38

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
Page 2 of 38
2. SAFETY PRECAUTIONS
General considerations:
•Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the
unit or other equipment associated with the system.
•Read the manual carefully prior to connecting the unit. Follow all installation and maintenance
instructions throughout the unit’s working life. Pay special attention to the installation standards of the
National Electrical Code.
•Do not use the device without the cover on.
•Aonchip recommends using the original cables and accessories that are supplied with the device.

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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3. OVERVIEW
Modbus protocol is one of the communication standards more extended in the industrial sector. It is easy to
find many applications with devices which integrate this protocol like energy meters, programmable logic
controllers (PLCs), sensors and so on.
The SmartBridge is a device which works as a Master in the Modbus RS485 network and it is able to read and
write parameters from the Modbus network through the LoRaWAN communication.
Figure 1.SmartBridge external appearance
LoRaWAN is a very extended internet of things (IOT) protocol so it is possible to integrate the SmartBridge in
many platforms to get and manage the data from the device.
Figure 2. Example of integration in a LoRaWAN ecosystem
The SmartBridge is also provided with NFC technology. It means the commissioning process can be carried
out in an easy and safe way through any smartphone with NFC technology and using the app SmartBridge
Tool.

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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Figure 3. Status and configuration parameters can be obtained using the NFC technology in smartphones and SmatrBridge Tool app

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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4. INSTALLATION
4.1. Electrical diagram
Figure 4. Diagram connection for SmartBridge in the RS485 Modbus Network
4.2. Connectors
Figure 5. Connectors location in SmartBridge circuit
J8.1
J8.2
J8.3
J8.4
J8.5

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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Connector
position
Description
Electrical value
J8.1
Not used
J8.2
Not used
J8.3
RS485 communication output – signal A
From -7V to +12V
J8.4
RS485 communication output – signal B
From -7V to +12V
J8.5
Voltage reference for RS485 communication / Shield
0V

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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5. COMMISSIONING
5.1. NFC connectivity
First step is to configure the equipment to register it in the LoRaWAN network and define the Modbus
parameters which must be monitored by the SmartBridge. By default LoRaWAN communication and Modbus
parameters are the values used during manufacturing process to guarantee SmartBridge works correctly for
delivering to final customer.
It is possible to modify the default values via any smartphone with NFC communication. Tapping the cellular
over the front of the housing the values can be read and modified with application SmartBridge Tool.
NOTE 1
NFC communication is very selective. It means the NFC antennas of the smartphone and the SmartBridge
must be aligned. Please check the position of the NFC antenna in smartphone to find the best match position.
The figure below shows the position of the NFC antenna in SmartBridge.
Figure 6. NFC antenna location - white dotted rectangle
NOTE 2
After manufacturing process SmartBridge is programmed in a deep sleep special mode. To wake up the
SmartBridge from this mode only it is possible applying the NFC field (e.g. reading status or configuration via
smartphone with SmartBridge Tool application). If this action is not performed, SmartBridge will remain without
activity.

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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5.2. Setting LoRaWAN communication parameters
5.2.1. Understanding SmartBridge LoRaWAN profile class
SmartBridge can be integrated in a LoRaWAN network as a class A device. It means the device implement a
bi-directional communication profile in which the data sent by server only can be received by the node after
performing an uplink transmission. Is in this moment when the node open two short downlink receive windows
as it is shown in the figure below.
Figure 7. Uplink and downlink communication diagram for A class device
This communication profile is the best option to preserve the battery life as it is the profile which the quantity
of node transmissions is minimal.
5.2.2 LoRaWAN communication parameters
Time to send data
The interval to perform each uplink is defined in minutes. The minimum slot time which can be adjusted is 3
minutes and the maximum is 1400 minutes (once per day).
Must be taken into account as lower is the time to uplink less will be the battery life expected.
Activation method
SmartBridge can be configured in 2 different methods depending on user preferences (security, band
occupancy time, etc)
OTAA (Over The Air Activation Method). SmartBridge receive a device address and an
authorization token from which to derive sessions keys in combination with AppKey parameter
after sending a JOIN request to the server. This method provides high level of security.
ABP (Activation By Personalization). Sessions keys and device network address are predefined.
SmartBridge does not send a JOIN request to server but the security level is lower than OTAA
method.

SB020100 - Smart Bridge LoRaWAN - MODBUS
UMAOC003 Rev E
USER MANUAL
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Application EUI (AppEUI)
This parameter is used in OTAA method. It identifies the application during JOIN request. The length is 8 bytes.
Application KEY (AppKey)
This parameter is used in OTAA method. It encrypts data during the JOIN request. The length is 16 bytes.
Device Address (DevAddr)
This parameter is used in ABP method. It is the address in the Lora Network. The length is 4 bytes
Device EUI (DevEUI)
This parameter is used in ABP and OTAA method. The value cannot be modified (predefined in factory) and it
is used to identify the device in Lora Network (it is unique for each device). The length is 8 bytes
Application Session Key (AppSKey)
This parameter is obtained automatically in OTAA mode, but must be defined by user in ABP mode. The
Application Session Key encrypts data during transmission and other applications which can access to the
network cannot see the content of messages. The length is 16 bytes.
Network Session Key (NwkSKey)
This parameter is obtained automatically in OTAA mode, but must be defined by user in ABP mode. The
Network Session Key encrypts data during transmission and other networks cannot see the content of
messages. The length is 16 bytes.
Adaptive Rate
Data rate can be adapted automatically by the network (AUTO) or can be adjusted in a fix value by the user
(OFF).
Data Rate
This parameter is the speed at data which is transferred. It can be adjusted by user if adaptive rate is configured
as OFF.
Depending on the region (EU868, US915, AU915 or AS923) the data rate takes different values.
Table for EU868
DataRate
Configuration
Indicative physical bit rate [bit/s]
0
SF12 / 125kHz
250
1
SF11 / 125kHz
440
2
SF10 / 125kHz
980
3
SF9 / 125kHz
1760
4
SF8 / 125kHz
3125
5
SF7/125kHz
5470
6
SF7 / 250kHz
11000
7
FSK: 50kbps
50000
8..15
RFU