The document discusses the wireless M-Bus technology, which is a European standard protocol for smart metering applications. It operates at various radio frequencies and uses little power, making it suitable for long battery life. The technology supports various meter types and network topologies. It has low overhead and implementation costs compared to alternatives like cellular networks. The document also describes an open source ChatGram project that allows devices to exchange telemetry messages over wireless M-Bus, enabling basic communication between meters and monitoring equipment.

1. THE WIRELESS M-BUS TECHNOLOGY
• Alessandro Trapasso
• GitHub: https://github.com/Alee08/ChatGram
• LinkedIn: https://www.linkedin.com/in/alessandro-trapasso/

2. What is the wireless m-bus
technology ?
• Wireless M-Bus or Wireless
Meter-Bus is the European
standard (EN 13757-4).
• It is an emerging technology
in recent years.
• Wireless m-bus one of the
most useful wireless
protocols for smart
metering.
• Basis for new Advanced
Metering Infrastructure
(AMI).

3. IoT explosion
Wireless M-Bus for industrial sensor networks

4. WHY USE WIRELESS M-BUS FOR INDUSTRIAL?
• Connection with radio frequency. (868MHz,
433MHz and 169MHz.)
• No connection costs.
• Star network .
• Small stack size.
• European Standard.
• Low consumption 485mA during transmission.
• Long battery life. (10-20 years).
• Any kind of use possible.

5. FREQUENCI
ES &
MODES

6. COMPETITORS
SigFox
Average connection
costs.
Medium / high
coverage
Bandwidth 10-
1000bps
Very low
consumption
Wireless m-bus
No connection costs.
Coverage to customer
description
Bandwidth 19.2kbps
Low consumption
GSM/GPRS/EDGE(2G),
UMTS/HSPA(3G),
LTE(4G)
High connection
costs.
Alta Cover
(Worldwide)
Bandwidth
120kbps-10Mbps
Average
consumption

7. Metering System
Architecture
 As you can see the protocol stack
lies between the energy-efficient,
wirelessly connected smart
metering devices and the utility
data collector.

8. WIRELESS M-BUS
STACK
• The traditional OSI model shown
on the left hand side of the figure
below is commonly used to depict
stack architecture for various
protocols where each layer has
specific functions.
• Wireless M-Bus is slightly different
and has fewer requirements on
these layers.
• Typically larger stacks will drive
costs up as higher memory
resources are needed in hardware.

9. IM871A-USB
The iM871A-usb is a compact
wireless M-Bus USB adapter
based on the high
performance wireless M-Bus
module iM871A. The adapter
offers a cost-effective RF
solution for smart metering
applications connecting water,
heat, electricity and gas
meters with standard
equipment like Laptops,
Tablets, etc.
An adjusted output power of
+14 dBm combined with the
high sensitivity of the USB-
Stick enables ranges up to
500m.
supports S1, S1-m, S2, T1,
T2,R2, C1 and C2

10. POSSIBILITY
OF USING
IM871A-USB
Main use: Read your
meter.
Sniffing telegrams.
Create a short-range
encrypted
communication.

11. CHATGRAM!
• Chat created between two iM871A-USB devices. The devices exchange telegrams
via radio frequency. The chat is based on the wireless m-bus technology.
• What can I do with ChatGram?
• The ChatGram project is based on the wmbusmeters.
• Captures telegrams.
• Sends telegrams and receives telegrams.

12. Configuration and Run

13. CHATGRAM CAPTURE
TELEGRAMS & READ
YOUR METER.
It is possible to read sender address,
manufacturer, control flags, device version
and device type.
./build/wmbusmeters /dev/ttyUSB0
MyTapWater multical21 12345678
00112233445566778899AABBCCDDEEFF
./build_debug/wmbusmeters --
debug/dev/im871a

14. CODE
main.cc wmbus_im871a.cc
meter_generic.cc

15. DEMO

16. CHATGRAM USE
Launch Chatgram.
./build_debug/wmbusmeters --debug/dev/im871a
Capture the telegrams.
Find id-address.
Establish a chat.
./build_debug/wmbusmeters /dev/amb8465 MyMeter generico
00109999 «»
Id-adress = 00109999.

17. DEMO CHATGRAM

18. THANKS
• Alessandro Trapasso
• GitHub: https://github.com/Alee08/ChatGram
• LinkedIn: https://www.linkedin.com/in/alessandro-trapasso/