Transmit Data Via The Dongle Usb Amr; Wmbus Transmission Modes; Frame Format; Tx Frame Format (Host To Dongle) - ADEUNIS AMR Range Mode D'emploi

DONGLE USB WMBUS AMR - Mode d'emploi - User guide V1.3

4.4. Transmit data via the DONGLE USB AMR

4.4.1 WMBUS transmission modes

Devices which implement Wireless M-Bus stack are classified as either Meters, Others or Repeater devices, those three roles are define as such:
• Meters are mainly use for devices requiring sending information to a master, considered as slave or Tx devices.
• Others or Concentrator are use for devices collecting data from meters, also considered as master or Rx devices. It happens that the
concentrator sends information to the meter, to confirm it is ready to receive data, or to acknowledge data reception.
• Repeater are transponder devices, to allow data transfer from a meter to a concentrator.
The protocol stack defines three operating modes to exchange data between meters and Others:
Mode S: "Default Stationary" mode (a number of times per day )
Mode T : "Fast Transmit" mode (short data burst every few seconds)
Mode R : "Best RF range" mode, 10 frequency channels

4.5. Frame format

Find below a description of the Adeunis-RF Wireless-MBus packet format :
Rx frame format
Tx frame format
Tx or RX frame format, is the packet data exchanged between the module and the host, while the data transmitted over the air follow the Wire-
less M-Bus protocol framing, which includes Preamble, Synchro, Wireless M-Bus Encapsulation, encoded data, and CRC

4.6. Tx frame format (Host to DONGLE)

The DONGLE, to send any data over the air, must receive a packet format on the USB link with the following format:
0xFF
1 Byte
Wake-up Byte.

4.7. Tx frame extended format (Host to DONGLE)

This format is reserved to the bidirectional mode on «Other» side.
0xFF 0xFE
1 Byte 1 Byte
Wake-up Byte. Start of frame
RX
USB
TX
0xFF
1 Byte
Define the length in Bytes of
the Data section. Maximum
Start of frame
length is 245 for T mode and
213 byte for other modes.
Length
1 Byte
Define the length in Bytes of
the Data section. Maximum
Manufacturer ID and address
length is 245 for T mode and
213 byte for other modes.
Must be set to 0 in R Other
mode to request a frame
from meter.
RX
WMBUS
EN13757-4
Length
1 Byte 1 Byte
CI Field to be sent in the Tx
Frame
M&A
2+6 Bytes
CI Field to be sent in the Tx
Must be left empty in R
Other mode when Length
TX
CI Data
From 1 Byte to 245 Bytes
Payload
Max=245 mode T
Max= 213 modes R/S
CI
From 1 Byte to 245
1 Byte
Payload
Max=245 mode T
Frame
Max= 213 modes R/S
Must be left empty in
R Other mode when
field equals 0 Length field equals 0
Page
Data
Bytes
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