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
	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 byte256 ) + PM2.5 low byte)/10
PM10 data content: PM10 (µg/m3) = ((PM10 high byte256 ) + PM10 low byte)/10

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