3.3
Remote setting of module parameters through the NB IoT back channel
NB-IoT network uses standard Internet Protocol (IP) that naturally enables data communication in
both direc-
tions
. The NB-K868 module can use bi-directional communication for setting of its parameters from so called
”back channel”
, that is (for the reason of saving battery) opened only during two second period after transmit-
ting of each message (INFO, TRAP, or RESPONSE). In this period the module’s receiver is switched on and the
module is able to receive message from remote server.
Messages in reverse direction can be used for setting of module parameters. As these
”setting messages”
are
also coded by NEP protocol, they have in fact same structure, as the messages transmitted by module (i.e. set of
NEP-coded individual variables inside UDP packet).
The first variable in each setting message is always
Message type
. Setting messages are always of
”SET”
type
(OiD 63 =
”1”
). This variable is followed by one or more variables, that are requested to change.
The NB-K868 module performs setting of requested parameters (update requested variables) and sends back a
message of the
”RESPONSE”
type (OiD 63 =
”4”
), that contains set of variables after requested update. The
message is addressed either to the IP-address of the server from which the SET request came, or to the preset IP
address of target server (depending on the setting of ”Reply” parameter by ”sreply” command).
Remote setting of parameters through the back channel can be used for setting of same parameters that can be
set by optical interface (because both systems work on the same principle). More details about the back-channel
communication can be obtained from the producer upon request.
3.4
Overview of module configuration parameters
Overview of configuration parameters that can be used for user settings of the NB-K868 module is shown in the
Table
below. The parameters are presented in the same order as they appear in the List of all configuration
parameters (see paragraph
In the
”
Type”
column there is a data type of the parameter.
”
Code” indication in this field means that the value
is displayed in hexadecimal code (couple of hexadecimal characters means 1 Byte) with one exception - IP-address
is indicated in common form (four decimal octets separated by dots). ”Curr. status” indication means that the
field contains current value of operational parameter that cannot be influenced. Range of numbers means that there
could be a number from mentioned range.
In the
”
Default”
column there are default (factory) settings of the parameter. Colour marking of this field has
following meaning:
•
green colour - commonly used parameters that should be set in reliance on the specific usage
•
red colour - parameters that are not recommended to change
•
grey colour - values that cannot be changed (
”
read only”)
Yellow colouring
of the
”
Item” number highlights the parameters, that can be configured by using of
USB-IRDA
optical converter
as described in details in chapter
”
Setting of parameters by using of optical converter”. These
parameters can be set also remotely (from remote server) with using of NB-IoT back channel.
NB-K868
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