WMBus TECHNOLOGY
WMBus Module
868MHz Wireless MBus (WMBus)
Radio Frequency (RF) Communication
Output Power level
Power Level Configurable (-1 dBm to 13 dBm)
Link Budget
Up to 130 dB
Communication Distance
Up to 3km (Line of Sight)
Typical Communication Distance Indoor/Urban
>100m
Link Modes
Configurable (S - Mode, T - Mode, C -  Mode,
C/T - Mode together)
Supported CI Values
53h, 5Bh, 60h, 6Ch, 6Dh, 6Eh, 6Fh, 72h, 74h, 75h, 78h, 7Ah, 7Ch, 7Dh, 80h, 8Ah, 8Bh, 8Ch, 8Dh, 8Eh, 8Fh, C3h, C4h, C5h
Decryption
AES Decryption of Received Frames for up to
40 Devices (Mode 5, Mode 7, Mode 128 and custom modes)
Device Modes
Configurable
Meter - send frames or Other Device - listen frames
Transparent Mode
Unlimited Numbers of WMbus device data can be listened over air and WMBus frames can be sent to remote server in Transparent Mode


ETHERNET SWITCH TECHNOLOGY
Ethernet Standards
IEEE 802.3 for 10Base-T
IEEE 802.3u for 100Base-T(X)
IEEE 802.3x Flow Control
Mac Table
1K MAC address entry
Processing
Store-and-Forward
Memory
448K bits packet buffer memory

Modbus Protocol
Modbus TCP or RTU
Configurable
Modbus Devices
Up to 20 Modbus device connection in
Modbus TCP or RTU Conversion Modes
(This is value of Modbus Master Devices)
Modbus Address
Modbus address freely can be assigned up to
40 WMBus Devices
Modbus Data
Data can be read via Function Code 3
Read Holding Registers (4x)
Data Structure
Modbus data is stored in three parts:
Status Block, several Data Blocks depends on
number measurements stored in WMBus device and finally the Service Block.
Status Block, 6 Registers:
- WMbus Device ID: 2 Registers
- WMbus Man ID: 1 Register
- WMbus Version: 1 Register
- WMbus Type: 1 Register
- Total Data Count: 1 Register   (Represents how many data blocks exists)
Data Block, each 5 Bytes total n bytes:
- Storage Number: 1 Register
- Function Field: 1 Register
- Data Type: 1 Register
- Data Value: 2 Registers
Service Block, 2 Registers:
- Access Number: 1 Register
- RSSI Value: 1 Register

MQTT Publisher can be enabled and can be used in parallel with Modbus conversion (or stand alone)
MQTT Connection
Broker IP and Port can be entered
Client ID , User name and Password can be set
Publish Topic and Subscribe Topic can be defined from web interface
Data Send Interval
User can send Data send interval in seconds
Default is 60 seconds and LKM will send meter data to MQTT server in that interval
NTP Server
NTP server time will be added to each MQTT message
Data Format

There are 3 predefined formats
RAW WMBUS DECRYPTED DATA: STG will share WMBus frame as it is but decrypted
PARSED DATA AS OBJECTS: STG will share WMBus data as parsed objects
PARSED DATA AS MODBUS FRAME: STG will share WMBus data as Modbus like frame

SMA Antenna Connector for WMBus
1 Standard SMA female interface, 50 ohm
Console Port
USB Type-C or Micro USB connection for LOG in 115200 baud
10/100T(X) RJ45 Ports
Ethernet Connection on 2 ports
Serial Ports
5 pin wired Terminal Connection
Tx, Rx, GND for RS232
A, B and GND for RS485

Reset Buttons
Reset to Client and Reset to Server Operating modes buttons

Power indicator
Power LED
10/100T(X) Indicators
Activity LEDs:
ETH1, ETH2 and TLM (Activity of device itself)
System Indicators
Status LED,
Tx and Rx of data LEDs and Server LED
(LED ON: Server Operating Mode, LED OFF: Client Operating Mode)
WMBus Indicators
Alive (Blinks during normal operation), Tx and Rx of data LEDs
Console Indicators
Tx and Rx of data LEDs

Input Range
100 - 240V AC (120 – 370V DC), 50Hz to 60Hz AC input
Isolation
Fully Isolated >4200Vrms, 5mA 1 Min
Insulation
Class II

Enclosure
Metal, IP 40
Dimensions
43 x 95 x 124 (w x d x h) mm
Weight 
~400gr
Storage Temperature
-40 to 105 °C 
Operating Temperature
-25 to 70 °C  
Operating Humidity
5% to 95%Non-condensing