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Air Quality Particulate Matter Sensor Module PM 2.5 SDS011

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Specifications:

  • Working Voltage: 5V
  • Working Current: 100mA (max.)
  • Sleep Current: 2mA
  • Response Time: 1s
  • Measuring Output: PM2.5
  • Range: 0.0 – 999.9 ug/m3
  • Serial Data Output Frequency: 1 time/s
  • Particle Diameter Resolution: < 0.3um
  • Relative Error: 10%
  • Dimensions: 71mm x 70mm x 23mm

 

Interface Specifications:

  • Pin 1: CTL – Control Pin, Reserved
  • Pin 2: 1um – > 0.3 Micron particle concentration, PWM Output
  • Pin 3: 5V – 5V Power Input
  • Pin 4: 25um – > 2.5 Micron particle concentration, PWM Output
  • Pin 5: GND – GND
  • Pin 6: R – Serial port receiver RX
  • Pin 7: T – Serial port receiver 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

 

Number of BytesNameContent
0Message HeaderAA
1OrderC0
2Data 1PM2.5 Low Byte
3Data 2PM2.5 High Byte
4Data 3PM10 Low Byte
5Data 4PM10 High Byte
6Data 50 (Reserved)
7Data 60 (Reserved)
8ChecksumChecksum
9Message TrailerAB

 

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

 

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