TENEO LoRaWAN CO2 stoplicht, Руководство пользователя

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Manual LoRaWAN CO
2
stoplicht
13
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All rights reserved.
All information in this manual Is subject to change without further notice.
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Port 1: CO
2
Measurement:
Byte Length Description
0 1 Header
1 1 RFU
2..5 4 CO
2
display
6..7 2 Temperature display
8..9 2 Humidity display
These values are not the actual values of the measurements, they must first be converted. For this
calculation see the relevant chapters.
The CO
2
sensor controls the current measurement values.
This message is sent with an adjustable interval (period time).
For example, this message looks like this:
0x0F 00 00 01 53 3B 07 53 11 4D
The meaning of this post is:
Byte 0:0x0F = System voltage: 3.5 V
Byte 1:0x00 = RFU
Byte 2..5:0x00 01 53 3B = 868.43 PPM
Byte 6..7:0x07 53 = 18.75 degrees Celsius
Byte 8..9:0x11 4D = 44.29% RH
Header:
Bit number Description
3..0 Battery view
The system voltage is calculated as follows:
2+ (Battery display/10)
If the battery display in the message is 0x0C (12), the system voltage calculation becomes:2 + (12/10) =
3.2 V.
Measured CO
2
value:
Byte number Length Description
2..5 4 CO
2
display
This byte shows the measured CO
2
value. To convert this value to the actual measured value, this
calculation must be used:
CO
2
in PPM = CO
2
value /100
0x0001533B: This has a decimal value of 86843.
86843/100 = 868.43 PPM
Measured temperature:
Byte number Length Description
6..7 2 Temperature value
The temperature can be negative, to convert it, the MSB must be looked at.
If this MSB is 1 then the temperature is: - (65536 – temperature value
) /
100.
If this MSB is 0 then the temperature is: temperature value /100.