Air Quality Particulate Matter Sensor Module PM 2.5 SDS011
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 Bytes | 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 (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