Wireless m-bus master/repeater WMR-IoT

Wireless m-bus master WMR-IoT

WMR-IoT is an USB-based wireless m-bus receiver/repeater, intended to collect data from various devices, working in modes T, S or C according to wireless m-bus standard (EN13757-4). This device has simple function – collect data from every wireless meter in range, and show the user valid data, signal strenght and additional information about meters read. Device is powered directly from an USB port and works with FTDI-based chip. It is small, simple and ideal for walk-by readings or just for gathering info for a given wireless network.

Data is visualized in free Gineers software - versions for Windows and Android. It can decode telegrams, decrypt AES-128 Mode 4 and 5 (CBC) encrypted data, import/export data by user-created template and some other usefull functions. Windows version also supports simple database with records for read meters in the past. For more detailed overview of the software and WRM-IoT please take a look at WRM-IoT software User Manual.

user manual WMR-IoT

Software GinWalk


Technical characteristics of WMR-IoT

RF band 868 - 870 MHz, 12 channels
wireless m-bus modes T1, T2, S1, S2, T1+C, T2+C, R
interface USB 1.1/2.0/3.0 (FTDI drivers, virtual COM port)
serial port bps 19200 bps, None
power supply 5 Vdc/100mA
power consumption @ 5Vdc < 0.2W
antenna quarter-wave 868 MHz
work temperature from -20° C to +50° C
storage temperature from -50° C to +85° C
humidity 40 ÷ 90 %
dimensions (HxWxD, w/o antenna), mm 50/25/15 mm
protection class IP20
own weight 25 g

Normal mode of operation WMR-IoT

WMR-IoT starts work immediately after plugged in USB port or other power supply is turned on. Device has embedded FTDI chip, so in order to work correctly user should install proper FTDI drivers. If drivers are installed correctly then user will see WMR-IoT in its Device Manager as serial port (USB-to-232). All other things are made by Gineers software, provided with each WMR-IoT device. Software is capable of chanign device wireless mode, see signal strength, decrypt encrypted meters (of course - if key is provided), export data, save in simple database and so on. This device can also be used as a repeater in some cases. This means that device can be set work permanently as wireless m-bus repeater, re-translating every signal in range. This usually means that device should be powered from other source than USB port. We provide two options:

  • power adapter 220Vac/5Vdc, with USB connector
  • Gineers adaptive board for WMR-IoT, input power supply 6-30V ac/Vdc, output 5Vdc/100mA

To start reading particular network of wireless devices two main steps that must be done:

  • set WMR-IoT in desired wireless m-bus mode through software
  • load file with meter serial numbers and AES-128 keys (if meters are encrypted)
  • start read/search immediately for meters, without loading them from a file

Meters can only be read once or continously - it depends on the user. After all meters are read, there are two main things that can be done with the data:

  • Data can be exported in CSV file. User can create custom templates how the data will be exported;
  • Data can be also saved in a local, simple database. It is structure based, but later user can make reports and review older readings (and export them again)

For more information please refer to WMR-IoT Software manual or contact with us.