SM300D2 seven-in-one sensor module is a high cost-effective digital serial output sensor module. It uses two output modes, RS485 data bus and UART serial TTL level. It integrates CO2, formaldehyde, TVOC, laser PM2.5, PM10, temperature and humidity. It can real-time and comprehensive detection of the environment, has good stability, very convenient for customers to use.
 
Application area:

Air quality control in hotel rooms
Environmental monitoring of agricultural greenhouses and outdoor farming sites
Fresh air ventilation system
Air purifier, air conditioning
Air quality monitoring equipment
Air exchange control system for kitchen and toilet
Intelligent Home Appliances
 
Characteristic:
Export carbon dioxide, formaldehyde, TVOC, PM2.5, PM10, temperature and humidity at the same time.
High sensitivity and data stability
Two output modes, RS485 bus and UART TTL level, are adopted to facilitate customers to choose and use them independently.
Temperature accuracy to 0.1 C, humidity accuracy to 0.1% RH
Seven sets of monitoring data are automatically output per second through RS485 interface
With anti-backconnection protection function of power supply

class other

Measurement resolution

Scope of measurement

Measurement accuracy

eCO2

 

400ppm~ 5000ppm

+50ppm

ECH2O

1Ug/m3

1UG~1000ug

 

TVOC

1Ug/m3

0ug~2000ug

 

PM2.5

0.8ug/m3

5ug~5000ug

+10%

PM10

 

5ug~5000ug

+10%

Temperature

0.01Temperature

-40 ~ 125Temperature

+0.5Temperature

Humidity

0.04%

0~100%

+3%RH

Physical interface

ZH1.5-4Sleeping seat holder

output data

UART-RS485

working voltage

5 + 0.2VDC

Working current

Less than60mA

Preheating time

2 minutes

working temperature

0 ~ 50 C

Working humidity

Less than 95%RH

Outline size

55.8*50*19.5mm(L * W *H)

Service life

5year(air))


RS485Interface definition:

 

Interface

Name

Function

1

5V

Power supply 5V

2

B

RS485Data port D-/B

3

A

RS485Data port D+ /A

4

GND

Power ground

 

 

 

 

UARTInterface definition:

 

Interface

Name

Function

1

5V

Power supply 5V

2

TXD

UARTData output foot

3

N/A

Suspended

4

GND

Power ground

 

 

communication protocol:

baud rate

9600bps

Data bits

8 place

Stop bit

1 place

Parity bit

nothing

 

 

Serial Data Stream Format:

Byte

name call

say bright

B1

Module address

Fixed value3Ch

B2

version number

Fixed value02h

B3

data

eCO2High byte

B4

data

eCO2Low byte

B5

data

eCH2OHigh byte

B6

data

eCH2OLow byte

B7

data

TVOCHigh byte

B8

data

TVOCLow byte

B9

data

PM2.5High byte

B10

data

PM2.5Low byte

B11

data

PM10High byte

B12

data