Nokeval Kombi-LoRaWAN, Manual

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9
Example uplinks
Here are some example uplinks to help clarify how the uplink payloads are structured.
Bytes are presented as hex values, numbers are LSBF. E.g. consecutive bytes 0x01 and 0x23 converted to
unsigned int16 equals 0x01 + 0x23*0x100.
Example – normal measurement data
Bytes (hex): 01 0E 0A 01 00 3B 98 09 B0 0B AD 0D E3 FB 78 05 00
Interpretation:
Bytes (hex) Name Meaning
01 Protocol version 01 – Version
0E Message length Message length 14, excluding length field.
0A Message type Type 10 = measurement data
01 00 Measurement
format Always 1
3B Measurement flags Which of the measurement fields are included.
0x3B = 0011 1011, meaning all except 2
98 09 0 – Temperature 2456 -> 24.56C
B0 0B 1 – Relative
humidity
2992 -> 29.92%
AD 0D 3 – VOC 3501 ppb
E3 FB 4 – Differential
pressure
-1053 -> -10.53 Pa
78 05 5 – CO2 1400 ppm
00 Status flags 00 = No errors
Example – measurement data with active status
Bytes (hex): 01 0C 0A 01 00 03 98 09 B0 0B 38 01 04 02
Interpretation:
Bytes (hex) Name Meaning
01 Protocol version 01 – Version
0C Message length Message length 12, excluding length field.
0A Message type Type 10 = measurement data
01 00 Measurement
format Always 1
03 Measurement flags Which of the measurement fields are included.
03 = 0000 0011, meaning temperature and relative
humidity values
98 09 0 – Temperature 2456 -> 24.56C
B0 0B 1 – Relative
humidity
2992 -> 29.92%
38 Status flags Which status field are included.
0011 1000 = 3, 4, 5
01 3 – VOC status VOC measurement status 1
04 4 – DP status DP measurement status 4
02 5 – CO2 CO2 measurement status 2