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MULTIFUNCTION AIR QUALITY SENSOR MODULE (MODBUS)
User Guide for SRAQ-D701

L-com SRAQ-D701 Multifunction Air Quality Sensor Module

אינהאַלט באַהאַלטן
1 פּראָדוקט באַשרייַבונג
2 פֿעיִקייטן
3 אַפּפּליקאַטיאָנס
4 טעכניש פּאַראַמעטערס
5 מאַונטינג דיאַגראַמז
6 דראָט דעפֿיניציע
7 קאָמוניקאַציע פּראָטאָקאָל
8 Read Address Command
9 באַשרייַבונג
10 ענינים וואָס דאַרפֿן ופמערקזאַמקייַט
11 דאָקומענטן / רעסאָורסעס
11.1 רעפערענצן

פּראָדוקט באַשרייַבונג

The SRAQ-D701 is a comprehensive air quality sensor module which combines CO², laser dust, temperature and humidity, TVOC and formaldehyde.
Developed for integration into air purifiers, air quality monitors and custom enclosures. The SRAQ-D701 provides real time concentration values via Modbus-RTU output. It offer good stability, and is well suited for applications where TVOC and particulate matter concentrations are a concern.

פֿעיִקייטן

  • Detects multiple pollutants CO2, dust etc.
  • מאָדבוס רעזולטאַט
  • High reliability and good stability
  • High accuracy & fast response
  • Compact design for easy integration

אַפּפּליקאַטיאָנס

  • Office and commercial buildings
  • Factory floors
  • לאַבאָראַטאָריעס
  • HAVC industry
  • General air quality monitoring
  • Smart home systems

Thank you for choosing L-com product. To ensure safe, accurate performance and product longevity, please take a moment to familiarize yourself with this manual before powering the device. Please keep it handy for future reference. In case of any questions regarding the installation or use of product, please call us at 800.341.5266.
קאָנטאַקט אונדז אין customerservice@l-com.com און באַזוכן אונדזער webפּלאַץ בייַ www.l-com.com

This datasheet has been downloaded from http://www.digchip.com ביי דעם בלאַט

טעכניש פּאַראַמעטערס

Detection Parameters and Resolution: The CO2 value and formaldehyde value measured by the module are equivalent value of TVOC, please pay attention when using or purchasing.

פּאַלוטאַנט מעזשערמאַנט האַכלאָטע מעאַסורינג קייט אַקיעראַסי
eCO2 1 פּיפּיעם 400 ~ 5000 פּיפּיעם ± 100 פּיפּיעם
PM2.5 0.3 ug/m3 0~1000 ug/m3 ± 10%
PM10 0.3 ug/m3 0~1000 ug/m3 ± 10%
טעמפּעראַטור 0.01 °C 20 ~ 80 C ± 0.5 °C
הומידיטי 0.04% 5~100% RH ± 3% רה
TVOC 1 ug/m3 1230 ug/m3 ± 90 ug/m3
CH2O 1 ug/m3 500 ug/m3 ± 40 ug/m3
  1. אַרבעט וואָלtagE: 5 ± 0.2 וודק
  2. Working environment: Working temperature 0~50 °C, Working humidity: 15% RH  90% RH (no condensation)
  3. Working environment: Temperature range -20~60 °C, Humidity: 5% RH  95% RH (no condensation)
  4. Communication method: Modbus RTU  RS485
  5. Preheating time: 10-15 minutes, the longer the power-on time, the more stable the data will be.

מאַונטינג דיאַגראַמז

Mounting type: Board mount. Hole diameter 2 mm, pitch 11.5 mm.

L-com SRAQ-D701 Multifunction Air Quality Sensor Module - Mounting Diagrams

דראָט דעפֿיניציע

Port connector type is XH2.54mm pitch 4-pin terminal connector, 90° vertical mounted to PCB.

סר ניין. פֿונקציע הערות קאָליר
1 VCC 12 – 24 VDC, power supply positive ברוין
2 GND GND, power supply negative שוואַרץ
3 RS485_A+ RS485_A+ גרין
4 RS485_B- RS485_B- בלוי

קאָמוניקאַציע פּראָטאָקאָל

The module hardware supports serial TTL communication interface and RS485 communication interface. When testing, users need to choose the corresponding communication method development according to the module interface type they have purchased.
RS485 Interface Communication Interface Related Protocol:
Serial port parameters: (9600/8/N/1) Mod Bus-RTU 485
The factory default address of the module is 0x01
Baud rate: 9600, Check bit: no, Stop position: 1 bit
Return data time: <300ms
The reading speed cannot exceed 350ms

Read Address Command

באַקומען פאַרפעסטיקט פונקציע קאָוד פאַרפעסטיקט פאַרפעסטיקט פאַרפעסטיקט פאַרפעסטיקט CRC_L CRC_H
FE 17 00 00 00 01 CRC טשעק
ענטפער פאַרפעסטיקט פונקציע קאָוד נומער פון ביטעס Firmware ווערסיע קראַנט אַדרעס CRC_L CRC_H –
FE 17 02 xx yy CRC טשעק –

פֿאַר עקסample: Send command: FE 17 00 00 00 01 A0 06 Return data: FE 17 02 11 01 64 30
Indicates that the device address is 01 and the version number is V1.1
Modify Address Command
The factory default address of the module is 0x01, and the address range can be changed to: 0~254.

באַקומען קראַנט אַדרעס פונקציע קאָוד פאַרפעסטיקט פאַרפעסטיקט רעזערווירט פעליקייַט אַדרעס CRC_L CRC_H
yy 06 00 00 00 zz CRC טשעק
ענטפער Address Before Modification פונקציע קאָוד נומער פון ביטעס האַלטן Modified Address CRC_L CRC_H –
yy 06 02 00 Zz CRC טשעק –

פֿאַר עקסample: When the current address is 01, the preset address is: 02
Send command: 01 06 00 00 00 02 08 0B Return data: 01 06 02 00 02 39 49
Read Data Command

באַקומען קראַנט אַדרעס פונקציע קאָוד רעגיסטרירן אָנהייב אַדרעס Number of Sensors Required to Read CRC_L CRC_H
yy 03 00 MM 00 NN CRC טשעק
ענטפער קראַנט אַדרעס פונקציע קאָוד דאַטאַ לענג סענסאָר דאַטאַ CRC_L CRC_H –
yy 03 NN*2 xx xx ……xx xx CRC טשעק –

Note: The returned xx xx ……xx xx sensor data can be changed according to the register address and data length.
00 MM represents the register address of the sensor, and 00 NN is the data length.

Register address（00 MM）
00 00 00 01 00 02 00 03 00 04 00 05 00 06
eCO2 TVOC CH2O PM2.5 הומידיטי טעמפּעראַטור PM10

באַשרייַבונג

  1. The minimum number of sensors 00 NN is 00 01, and the maximum is 00 07. When the MM value is 00, the maximum NN value can be 07. At this time, the value of all sensors can be read, and it can also be 01. When it is 01, only CO2 data can be read alone. And so on.
  2. The address at the front of the register can read the data of the following sensor when the data length is increased, but the address at the back of the register cannot read the data of the sensor before this address. See details below:
00 MM 00 NN Environmental data that can be read
00 00 00 01 Indicates that CO2 data is read from the starting address 00 00
00 00 00 02 Means to read CO2, TVOC data from the starting address 00 00
00 00 00 03 Means to read CO2, TVOC, CH2O data from the starting address 00 00
00 00 00 04 Means to read CO2, TVOC, CH2O, PM2.5 data from the starting address 00 00
00 00 00 05 Means to read CO2, TVOC, CH2O, PM2.5, H data from the starting address 00 00
00 00 00 06 Means to read CO2, TVOC, CH2O, PM2.5, H, T data from the starting address 00 00
00 00 00 07 Means to read CO2, TVOC, CH2O, PM2.5, H, T, PM10 data from the starting address 00 00
00 01 00 01 Indicates that the TVOC data is read from the starting address 00 01
00 01 00 02 Indicates that TVOC and CH2O data are read from the starting address 00 01
00 01 00 03 Means to read TVOC, CH2O, PM2.5 data from the starting address 00 01
00 01 00 04 Means to read TVOC, CH2O, PM2.5, H data from the starting address 00 01
00 01 00 05 Means to read TVOC, CH2O, PM2.5, H, T data from the starting address 00 01
00 01 00 06 Means to read TVOC, CH2O, PM2.5, H, T, PM10 data from the starting address 00 01
00 02 00 01 Indicates that CH2O data is read from the starting address 00 02
00 02 00 02 Indicates that CH2O and PM2.5 data are read from the starting address 00 02
00 02 00 03 Means to read CH2O, PM2.5, H data from the starting address 00 02
00 02 00 04 Means to read CH2O, PM2.5, H, T data from the starting address 00 02
00 02 00 05 Means to read CH2O, PM2.5, H, T, PM10 data from the starting address 00 02
00 03 00 01 Indicates that PM2.5 data is read from the starting address 00 03
00 03 00 02 Means to read PM2.5, H data from the starting address 00 03
00 03 00 03 Means to read PM2.5, H, T data from the starting address 00 03
00 03 00 04 Means to read PM2.5, H, T, PM10 data from the starting address 00 03
00 04 00 01 Indicates that the H data is read from the starting address 00 04
00 04 00 02 Means to read H, T data from the starting address 00 04
00 04 00 03 Means to read H, T, PM10 data from the starting address 00 04
00 05 00 01 Indicates that the T data is read from the starting address 00 05
00 05 00 02 Means to read T, PM10 data from the starting address 00 05
00 06 00 01 Indicates that PM10 data is read from the start address 00 06

How to Read a Frame of Data
פֿאַר עקסample, if the address of the module is 0x01, the user needs to send 01 03 00 00 00 07 04 08 to read out seven kinds of sensor data.
The returned data format is as follows:

בייט[0] בייט[1] בייט[2] בייט[3] בייט[4] בייט[5] בייט[6] בייט[7] בייט[8] –
כעדער פונקציע קאָוד דאַטאַ לענג CO2 דאַטאַ TVOC Data CH2O Data –
0x01 0x03 0x0E CO2_H CO2_L TVOC_H TVOC_L CH2O_H CH2O_L –
בייט[9] בייט[10] בייט[11] בייט[12] בייט[13] בייט[14] בייט[15] בייט[16] בייט[17] בייט[18]
PM2.5 דאַטאַ הומידיטי דאַטאַ טעמפּעראַטור דאַטאַ PM10 דאַטאַ CRC16 טשעק
PM2.5_H PM2.5_L Hum_H Hum_L Tem_H Tem_L PM10_H PM10_L CRC16_L CRC16_H

Calculation Method of Each Sensor Data
CO2 (ppm) = CO2 _H * 256 + CO2 _L
TVOC(ug/m3) = (TVOC_H * 256 + TVOC_L) / 10
CH2O(ug/m3) = (CH2O_H * 256 + CH2O_L) / 10
PM2.5 (ug/m3) = PM2.5_H * 256 + PM2.5_L
PM10 (ug/m3) = PM10_H * 256 + PM10_L
Positive temperature (°C) = (Temperature _H * 256 + Temperature_ L) / 10
פֿאַר עקסample: T = (0 x 0110) / 10 = 272 / 10 = 27.2 ℃

Negative Temperature (°C)
Method 1: Directly convert to a signed int type, for example: T = 0 x ffbf / 10 = -65 / 10 = -6.5 ℃
Method 2: If greater than 0 x 7fff (32767)
Then it is a negative number T = (0 x ffbf – 65536) / 10 = (65471 – 65536) / 10 = -65 / 10 = -6.5 ℃
Humidity (%RH) = (Humidity _H * 256 + Humidity _L) / 10
פֿאַר עקסample: T = (0 x 02AD) / 10 = 685 / 10 = 68.5 %RH
Note: If user need to use mg/m3 as the unit, please convert it. The conversion formula is: 1mg/m3 =1000 ug/m3
The length of the CRC check byte is 17 (that is, the bytes of Byte[0]~Byte[16]), select A001 or 8005 in reverse order.

ענינים וואָס דאַרפֿן ופמערקזאַמקייַט

  1. Avoid contact with organic solvents (including silica gel and other adhesives), paints, pharmaceuticals, oils and high-concentration gases.
  2. The module must not be subjected to excessive shock or vibration.
  3. דו זאלסט נישט צולייגן דעם מאָדולע צו סיסטעמען מיט פּערזענלעך זיכערקייַט.
  4. דו זאלסט נישט ינסטאַלירן די מאָדולע אין אַ שטאַרק לופט קאַנוועקשאַן סוויווע.

CRC Check Calculation Method
Function function: CRC check function, generate CRC
Parameter description: arr_ buff: array set to be verified
len: The length of the data to be verified
Return parameter: CRC is an unsigned int type, the high byte is the high byte in front, and the low byte is in the back unsigned int CRC_ Compute ( unsigned char *arr_ buff, unsigned char len)
{
unsigned int crc=0xFFFF;
ונסיגנעד טשאַר איך, דזש;
for ( j=0; j <len;j++)
{
crc=crc ^*arr_buff++;
for ( i=0; i<8; i++)
{
if( ( crc&0x0001) >0)
{
crc=crc>>1;
crc=crc^ 0xa001;
}
אַנדערש
crc=crc>>1;
}
}
return ( crc);
}

דאָקומענטן / רעסאָורסעס

L-com SRAQ-D701 Multifunction Air Quality Sensor Module [pdfבאַניצער גייד
SRAQ-D701, SRAQ-D701 Multifunction Air Quality Sensor Module, Multifunction Air Quality Sensor Module, Air Quality Sensor Module, Sensor Module

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