envea CAIRSENS PM Série Notice Technique page 63

26 Cairsens - UART Version
· Answer:
SYNC 1 byte
STX 1 byte
LG 2 bytes
7 bytes
REF 8 bytes
RSP 1 byte
Last minute 22 bytes
END 2 byte
CRC 2 bytes
ETX 1 byte
Frame length = 22 + 25 = 47 bytes
This frame return all data from the card : DUST and technical.
The bytes are received from the most significant to least significant: int_32 = Rx [0] | Rx [1] << 8 |
Rx [2] << 16 | Rx [3] << 24
32bit floating are coded "Little endian"
When the DUST module is not present, the measures PM2.5 and PM10 = NAN.
0xFF
0x02
0x00,0x16
0x2C
0x01
0x02
0x03
0x04
0x05
0x06
0x44
0x44
0x50 => 'P' = PACKET
0x01
0x00
0x00
0x00
0x04
0x13
0xE8,0x2B,0x12,0x05
0x60,0x2C,0x56,0x01
0x22,0x00
0x52
0x15,0x04
0x60
0x32
0x32
0x00,0x00
0x00,0x00
0x00,0x00
0x00
0xFF
0x52
0x61
0x03
PM2.5 µg/m3
PM10 µg/m3
Temperature 1/10e °C
Humidity 0-100%
Pressure hPa
Battery charge 0-100%
3WSolar efficiency 0-100%
13WSolar efficiency 0-100%
Spare_ANA1 millivolt
Spare_ANA2 millivolt
Spare_ANA3 millivolt
float
float
signed int16
uchar
unsigned int16
uchar
uchar
uchar
unsigned int16
unsigned int16
unsigned int16
© 2016 Cairpol