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May 3, 2017

Dust Detection Sensor

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Nova PM sensor SDS011 – High precision laser dust detection sensor module

Technical Parameters:

Item Parameter
Measuring output PM2.5,PM10
Range 0.0-999.9 µg/m3
Power supply voltage 5V
Maximum working current 100mA
Sleep current 2 mA
Operating temperature range -20-50℃
Response time 1s
Serial data output frequency 1 time/s
Particle diameter resolution Less than 0.3µm
Relative error 10%
Product size 71x70x23mm

Interface specification:

Pin Name Explain
1 CTL Control pin, reserved
2 1µm >0.3 Micron particle concentration, PWM Output
3 5V 5V power input
4 25µm >2.5 Micron particle concentration, PWM Output
5 GND GND
6 Rx Serial port receiver RX
7 Tx Serial port transmission TX

Communication protocol:

Serial communication protocol: 9600 8N1. (Rate of 9600, data bits 8, parity none, stop bits 1)
Serial report communication cycle: 1+0.5 seconds
Data frame (10 bytes): message header + order+ data(6 bytes) + checksum + message trailer

# Name Content
0 message header AA
1 order C0
2 data 1 PM2.5 low byte
3 data 2 PM2.5 high byte
4 data 3 PM10 low byte
5 data 4 PM10 high byte
6 data 5 0(reserved)
7 data 6 0(reserved)
8 checksum checksum
9 message trailer AB

Checksum: data 1 + data 2 + …+ data 6
PM2.5 data content: PM2.5 (µg/m3) = ((PM2.5 high byte*256 ) + PM2.5 low byte)/10
PM10 data content: PM10 (µg/m3) = ((PM10 high byte*256 ) + PM10 low byte)/10

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