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User Manual v1.4.3
HYDRODIGIT
PROTOCOL SPECIFICATION
Wireless MBUS OMS compatible
This section describes the management of the communication standard Wireless MBUS OMS compatible.
Telegram reading (direction: meter
other)
Code
Field
No.
Bytes
Value
(hex)
Total
Length
Description
Notes
L field
1
xx
1
Message length
C field
1
44
2
Control Field: indicates one-direction al-direction
of a slave-to-master reading
M field
2
B409
4
Constructor Code Encoding: BMT
A field
4
xx xx xx xx
8
8-digit serial number of the device
Generation, In
1
17
9
WMBus generation used
Medium
1
07/06
10
Measured medium (water / hot water)
CI field
1
7A
11
Control Information: indicates the encoding of
the following data
Count, Inc.
1
xx
12
Progressive count
Status
1
xx
13
Contains the alarm flags (if bits with value 1
are present, the alarm is active):
bit 7: reverse installation
bit 6: continuous reverse flow greater than the
threshold
bit 5: overflow
bit 4: burst (probable tube break)
bit 3: don’t care
bit 2: battery removal or battery life less
than 1 year
bit 1-0:
0: no error
1: application busy (currently unused)
2: application error (currently unused)
3: water leak age in the plant (continuous
water flow detected)
Configuration
field
(Signature)
2
xx xx xx
15
Encryption code used:
00 00: no encryption
x0 05: CBC AES 128 bit (Pre-Shared Key with
Cipher Block Chaining)
