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Summary of Contents for IMST 404600
- Page 1 IMST GmbH Carl-Friedrich-Gauß-Str. 2-4, D-47475 Kamp-Lintfort Wireless M-Bus Range Extender User Manual Version 1.6 Document State final Date November 2021 Document ID 4000/40140/0153 © 2021 IMST GmbH - All rights reserved...
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Page 2: Table Of Contents
History Version Date Comment June 2020 Initial Version October 2020 Updates with respect to firmware version February 2021 Missing Status Bit 3 for LoRaWAN Activation Procedure added to Range Extender Status Information Chapter Packet Decoding and Reassembly removed, see AN036 for further details April 2021 Missing LED signal "LoRaWAN activation... -
Page 3: General User Information / Disposal
Terms and Conditions” of IMST GmbH, supplied at the time of order acknowledgment. IMST GmbH assumes no liability for the use of its products and does not grant any licenses for its patent rights or for any other of its intellectual property rights or third-party rights. -
Page 4: Safety
Safety General Read this safety information attentively before using and operation of the Wireless M-Bus Range Extender Do not make any changes to the product. The housing may only be opened for the initial configuration of the Wireless M-Bus Range Extender and only by qualified specialist personnel. -
Page 5: Overview
Overview The Wireless M-Bus standard (EN 13757-4) is used in many wireless sensor and smart meter applications . These meters and sensors communicating according to defined radio operation modes based on a standard FSK modulation with more or less range to the corresponding receiving unit. -
Page 6: Range Extender Hardware
Range Extender Hardware Figure: Wireless M-Bus Range Extender without cover Hardware Features Power Supply via Battery. Radio module including TRX, µC and additional PCB antenna. Data memory User Interface for configuration and signalling The following explains some hardware features, necessary for the user to power and configure the Range Extender. Power Supply Power for the Range Extender is supplied via the 2-pin connector JST B2B-PH-K-S. - Page 7 User Interface Reed Sensor: to be used as magnetic switch with a simple magnet for external user actions, without a need to open the housing. LED for signalling. ® Internal Reset Butto for manual Reset after configuration of LoRaWAN settings. Internal Configuration Interface: Serial Configuration Interface (UART):...
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Page 8: Initial Setup
Initial Setup The Wirelesss M-Bus Range Extender requires an initial configuration before usage. This configuration can be done by means of a PC-Tool called WS Configurator which is connected via serial interface to the device. The configuration includes the following steps: ®... -
Page 9: Installation
Installation The Wireless M-Bus Range Extender housing consists of mounting brackets for fastening on a flat surface. Installation height must not be higher than 2 meters above ground to avoid any risks in case of falling down. The figure below shows the positions of the LED, the Reed Sensor and especially the integrated PCB antenna. For optimal RF performance please avoid any metal obstacles near the antenna area. -
Page 10: Functional Description
Functional Description The following chapters explain the firmware features in more detail. Range Extender Startup Calendar Events Real Time Clock Synchronization Wireless M-Bus Packet Filter Recording of Wireless M-Bus Packets Upload of Application Data LED Usage Wireless M-Bus Range Extender / User Manual Version 1.6 Page 10 of 29... -
Page 11: Range Extender Startup
Range Extender Startup After a power cycle or reset the Range Extender performs a startup procedure which includes the following steps: Step 1 : System Startup & Software Module Configuration After successful system startup the Range Extender reads and validates the required configuration settings. In case of valid settings ®... -
Page 12: Calendar Events
Calendar Events Calendar Events are used to define the runtime behaviour of this application. The firmware provides space for up to 32 configurable Calendar Events. A single Calendar Event item consists of the following three or four elements: Event Type The event type defines the kind of action to be performed, e.g. -
Page 13: Real Time Clock Synchronization
Real Time Clock Synchronization The Range Extender features an embedded Real Time Clock ( RTC ) which is used to schedule configurable Calendar Events. For proper operation it is highly recommended to synchronize the RTC. The initial synchronization can be done by means of the WS-Configurator PC-Tool. -
Page 14: Wireless M-Bus Packet Filter
Wireless M-Bus Packet Filter The firmware allows to define up to 32 Wireless M-Bus address filter items which should help to focus on those devices of interest during a Wireless M-Bus capture phase. The header fields mentioned here are present in the data link layer fields of each Wireless M-Bus packet. A single packet filter item consists of the following fields: Manufacturer ID Contains the 2 octet unique User/Manufacturer ID of the sender of a packet... -
Page 15: Recording Of Wireless M-Bus Packets
Recording of Wireless M-Bus Packets Two calendar event types are used to start a Wireless M-Bus packet capture phase either in S-Mode or combined C- / T-Mode. The received packets will be decoded according to the defined physical layer encoding Manchester, Three Out Of Six or NRZ. Every packet will be checked for CRC errors and only valid packets will be decoded according to the given frame format A or B. -
Page 16: Upload Of Application Data
Upload of Application Data The upload of application data like captured Wireless M-Bus packets is implemented by means of confirmed LoRaWAN® uplink packets. Due to the adaptive payload capacity of LoRaWAN® packets a complete Wireless M-Bus packet may require more than one LoRaWAN®... - Page 17 Application Messages and LoRaWAN® Ports ® The LoRaWAN Protocol supports port numbers which are used within this application to identify different kind of messages. The following ports are used for unsegmented messages: ® Message Type LoRaWAN Port Range Extender Status Information WM-Bus Packet Message without RSSI WM-Bus Packet Message with RSSI ( Firmware Version V1.1 ff.
- Page 18 Range Extender Status Information ® The Range Extender maintains some status information elements which can be transmitted over LoRaWAN or requested via local serial interface . The transmission can be initiated by means of a calendar event. Figure: Range Extender Status Format The Range Extender Status consists of the following elements: Range Extender System Time ( from embedded RTC ) Firmware Version...
- Page 19 The battery voltage is measured just before transmitting this status message. The value is returned in Millivolts. Firmware Type This element indicates different types of firmware verson: e.g. official released version or field test beta version: 0 = Release 1 = Field Test Beta Version X = Reserved Wireless M-Bus Range Extender / User Manual Version 1.6...
- Page 20 WM-Bus Packet Message without RSSI The following figure outlines the WM-Bus Packet Message format in more detail: Figure: Wireless M-Bus Packet Message Format Timestamp Field Every recorded Wireless M-Bus packet is stored with a 32-Bit UTC timestamp derived from the internal RTC which indicates the time of reception.
- Page 21 WM-Bus Packet Message with RSSI This message format is avaliable in firmware version V1.1 The following figure outlines the WM-Bus Packet Message format with RSSI in more detail: Figure: Wireless M-Bus Packet Message Format including RSSI Timestamp Field Every recorded Wireless M-Bus packet is stored with a 32-Bit UTC timestamp derived from the internal RTC which indicates the time of reception.
- Page 22 Transport Protocol Details The transport protocol is used in uplink- and downlink direction on several LoRaWAN® ports which indicate the type of message content. The protocol uses a single octet header field with following format: Figure : Transport Protocol Header Last Segment Indicator (Bit 7) This bit indicates the last segment of a transmission if set to "1".
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Page 23: Led Usage
LED Usage The Wireless M-Bus Range Extender features a dual color led which is used to signal multiple states and activities. Most of time the Range Extender will stay in a power saving state in which the led is switched off to save current. Visualization of internal Range Extender firmware state is done after power-up and can be triggered by means of a magnetic input signal via reed switch. -
Page 24: Default Settings
Default Settings The following table lists the default factory settings: Parameter Value Calendar Event List empty, no LoRaWAN uplinks WM-Bus Filter List empty, WM-Bus packet reception not possible Duplicate Filter enabled with additional 16 Bit CRC check LED Status signaling enabled WM-Bus Message upload / output with RSSI disabled... -
Page 25: Firmware Update
Firmware Update Updating the Range Extender firmware can be managed very easily by means of the provided PC tool called WS Configurator Wireless M-Bus Range Extender / User Manual Version 1.6 Page 25 of 29... -
Page 26: Technical Characteristics
Technical Characteristics Unless otherwise specified, all characteristics are applied for T = 25°C, VDD = 3.6V and are typical consumption values. Electrical Characteristics Power Supply (VDD) Lithium battery (Li-SOCI2) SL-2880 with connector PHR-2 3.6V, 19Ah, Size D Current Consumption (typ.) Transmit Mode: 45mA Receive Mode: 13mA ;... - Page 27 Housing Material: Polycarbonate UL94-HB, UV stabilized, gray, -40°C to +120°C NEMA 1, 2, 4, 4X, 12, 13 Certification RED (2014/53/EC) RoHS Directive (2011/65/EC) ® ® LoRaWAN 1.0.2 / LoRaWAN 1.0.4 Note that from firmware v1.1 ABP should only be used for test purpose. Wireless M-Bus Range Extender / User Manual Version 1.6 Page 27 of 29...
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Page 28: Faq
Question Answer Range Extender LED blinks 2 x yellow after Range Extender seems not be startup, but packet recording or upload is activated with respect to LoRaWAN. not possible Please configure and activate the Range Extender first. Range Extender LED blinks red and did not The Over The Air Activation is active but it stop seems that no server response can be... - Page 29 Wireless M-Bus Range Extender / User Manual Version 1.6 Page 29 of 29...