The SDS011 Air Quality Detection Sensor Module using scattering principles, can detect the air particle concentration between 0.3 to 10um in the air. It is accomplished with digital outputs and the built-in fan is stable and reliable.
Features:
- Accurate and Reliable: detection, stable, good consistency;
- Quick response: response time is less than 10 seconds when the scene changes;
- Easy integration: UART output (or IO output can be customized), fan built-in;
- High resolution: resolution of 0.3ug/m3.
Scope of application:
- PM2.5 Detector
- Purifier
- Air Exchangers
- Filtering system
Working principle:
Using scattering principle: Light scattering can be induced when particles go through the detection area. The scattered light is transformed into electrical signals and these signals will be amplified and processed. The number and diameter of particles can be obtained by analysis because the signal waveform has certain relations with the particles diameter.
Technical Parameters:
| No. | Item | Parameter |
| 1 | Measuring output | PM2.5,PM10 |
| 2 | Range | 0.0-999.9 ug/m3 |
| 3 | Power supply voltage | 5V |
| 4 | Maximum working current | 100mA |
| 5 | Sleep current | 2 mA |
| 6 | Operating temperature range | -20-50℃ |
| 7 | Response time | 1s |
| 8 | Serial data output frequency | 1 time/s |
| 9 | Particle diameter resolution | Less than 0.3um |
| 10 | Relative error | 10% |
| 11 | Product size | 71x70x23mm |
Interface specification:
| Pin | Name | explain |
| 1 | CTL | Control pin, reserved |
| 2 | 1um | >0.3 Micron particle concentration, PWM Output |
| 3 | 5V | 5V power input |
| 4 | 25um | >2.5 Micron particle concentration, PWM Output |
| 5 | GND | GND |
| 6 | R | Serial port receiver RX |
| 7 | T | Serial port transmission TX |
PS: The pitch of Interface is 2.54mm
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
| The 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
WARNING
