Adeunis RF MOTION V2, Техническое справочное руководство

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Date: 02/12/2019 Page 11 / 15
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Each sample is coded on 2 bytes:
•
1 for presence: 8 unsigned bits. Represents occupancy rate (in %) during the concerned period.
Example: 50% = a presence detected half the time.
• 1 for brightness: 8 bits unsigned in %. Example: 50 => 50% brightness
Maximum number of samples per frame:
• LoRaWAN 868: 24 samples
• Sigfox 868: 4 samples
Offset
(in byte) Data
Description
0 0x5C Frame code
1 Status Status byte
2 Presence state
Presence state when sending the frame:
•
0: no presence detected
• 1: presence detected
3-4 Pr luminosity
(t0)
Measured at t=0
5-6 Pr luminosity
(t-1)
Measured at t=-1
6-7 Pr luminosity
(t-2)
Measured at t=-2
… …
Decoding example:
Offset
(in byte)
Data Description
0 0x5C Frame code
1 0x80
Frame counter: 4
Bit1@0: LowBat not detected
2 0x01 A presence is currently detected
3-4 0x1E32
0x1E = 30 => a presence has been detected 30%
of the time during the concerned period (t-1 to t0)
0x32 = 50 => luminosity measured: 50%
5-6 0x0020
0x00 = 0 => No presence detected during the
concerned period (t-2 to t-1)
0x20 = 32 => luminosity measured: 32%
2.2.6 Presence Alarm (0x5D)
If the presence alarm is activated, this frame is sent when the presence detection begins, or ends.
Offset
(in byte) Data
Description
0 0x5D Frame code
1 Status Status byte
2 Alarm state
0: inactive alarm (end of presence)
1: active alarm (beginning of presence)
3 Luminosity Measured luminosity when alarm has occurred
Decoding example:
Offset Data Description
0 0x5D Frame code
1 0x80
Frame counter: 4
Bit1@0: LowBat not detected
2 0x01 Presence detected
3 0x32 50 => luminosity at 50%