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Example of an erasure whitelist file converted to JSON:
{
“wlFilter”: null,
“crc”: 0
}
4.2.2.2 L field for format B frames
In the WM Bus standard EN13757-4, there are two possible types of frame format for mode C1: A and B.
•
Format A: the L field (first byte of the frame) contains the number of bytes in the frame without
the CRCs
•
Format B: the L field (first byte of the frame) contains the number of bytes of the frame with the
CRCs (2 bytes of CRC if the frame length is less than 128 bytes, 4 otherwise).
In the WM-Bus frames recorded by the gateway, the CRCs are not present. Depending on the frame
format, the processing of the frame is not the same and it is therefore necessary to know the format used
by the counter.
By default, the gateway modifies the L field of frames in format B so that it is the same as for a frame in
format A, the processing of frames then becomes identical, regardless of the format.
However, it is possible to disable this behavior by applying the value “false” to the “BFormatLFieldAdaptation”
parameter.
4.2.3 Hub Connectivity
All the hub connectivity variables are in the “remote” object in JSON. They are split into 3 families:
• Modem.
•
FTP.
• NTP.
