Sample for Kaifa KFM_001

This sample shows a full data package, including start and stop bits. Please check the data breakdown for a more detailed description of each OBIS code value.

A good portion of raw sample data is also available in raw-raw-20170915.txt

SAMPLE Data:

[2017-09-12 23.18.43.731 - Received 41 (0x29) bytes]

7E A0 27 01 02 01 10 5A 87 E6 E7 00 0F 40 00 00 00 09 0C 07 E1 09 0C 02 17 12 2A FF 80 00 00 02 01 06 00 00 05 28 B8 0C 7E

Breakdown:

Data | Explaination ——–|————- 7E | Frame Start flag A | 4 bits, A = Frame Format Type 3 (0b1010) 0 27 | 11 bits, Frame size: 0x27 (39 bytes, excluding start/end flags) 01 | Destination Address (Address can be 1-4 bytes. Terminated by LSB=1) 02 01 | Source Address (Address can be 1-4 bytes. Terminated by LSB=1) 10 | Control Field 5A 87 | Header check sequence (HCS) (Check sum calculated from the address bytes, according to RFC 1662) Begin Data| LLC PDU Format (GB, 8.3 Fig 19)|| E6 | Destination LSAP E7 | Source LSAP 00 | LLC Quality 0F | Information, n*8 bits? 40 00 00 00 | (UNCERTAIN) 09 | ??String?? Kamstrup removed this, will it also disappear from Kaifa? 0C | 12 bytes (length of the string) 07 E1 | 2017 (year) 09 | 09 (sep) 0C | 12 (date) 02 | tuesday 17 | 23 (hour) 12 | 18 (min) 2A | 42 (sec) FF | (fff not specified) 80 | (deviation not specified?) 00 00 | (clock_status?) This is the 12th (0x0C) byte of the string 02 01 | (UNKNOWN) could this be another value, identified by 0x02? 06 | Integer following: 1320 Watt 00 | Byte 1 (MSB) 00 | Byte 2 05 | Byte 3 28 | Byte 4 (LSB) End Data| B8 0C | Frame check sequence (FCS) (Check sum calculated from full frame, excluding flags and FCS, according to RFC 1662) 7E | Frame End flag