How to Use SPS30: Examples, Pinouts, and Specs

The SPS30 is a state-of-the-art sensor from Sensirion designed to measure the concentration of particulate matter (PM) in the air. This sensor is capable of detecting a wide range of particle sizes, making it an invaluable tool for air quality monitoring. Common applications include HVAC systems, air purifiers, environmental monitoring, and smart home devices.

• Measurement Principle: Laser scattering
• Particle Detection Range: 0.3 to 10 µm
• PM Concentration Range: 0 to 1,000 µg/m³
• Interface: I²C and UART
• Supply Voltage: 4.5 to 5.5 V
• Max Current Consumption: 70 mA during measurement, 5 µA in standby
• Operating Temperature Range: -10 to +60 °C

To use the SPS30 sensor in a circuit:

1. Connect the VDD pin to a 5V power supply.
2. Connect the GND pin to the ground of the power supply.
3. Select the communication interface:
   • For I²C, connect the SEL pin to VDD, SCL to the I²C clock, and SDA to the I²C data.
   • For UART, connect the SEL pin to GND, TX to the RX of the microcontroller, and RX to the TX of the microcontroller.

• Ensure that the sensor is placed in an environment with unrestricted airflow.
• Avoid exposure to direct sunlight or high humidity to prevent measurement inaccuracies.
• Use pull-up resistors for I²C communication lines if they are not built into the microcontroller.

#include <Wire.h>

// SPS30 I2C address
#define SPS30_ADDRESS 0x69

void setup() {
  Wire.begin(); // Initialize I2C
  Serial.begin(9600); // Start serial communication at 9600 baud
  // Initialize the SPS30 sensor here (omitted for brevity)
}

void loop() {
  // Read particulate matter values from the sensor
  // This is a simplified example; actual implementation will vary
  Wire.beginTransmission(SPS30_ADDRESS);
  // Send read command here (omitted for brevity)
  Wire.endTransmission();
  
  // Read data back from the sensor
  // Process and output the PM values
  // This is a simplified example; actual implementation will vary
  
  delay(1000); // Wait for 1 second before reading again
}

• Sensor not responding: Ensure that the power supply is correctly connected and within the specified voltage range. Check the I²C/UART connections and settings.
• Inaccurate readings: Verify that the sensor is not placed near sources of pollution or obstructions that could affect airflow. Calibrate the sensor if necessary.

Q: How often should the SPS30 sensor be calibrated? A: The SPS30 is factory-calibrated and typically does not require frequent recalibration. However, if you notice significant deviations in readings, consult the manufacturer's guidelines for recalibration procedures.

Q: Can the SPS30 sensor measure the size of individual particles? A: The SPS30 provides the concentration of particulate matter in various size ranges but does not measure individual particle sizes.

Q: Is the SPS30 sensor waterproof? A: No, the SPS30 is not waterproof. It should be protected from water and high humidity to ensure accurate measurements.

For further assistance, consult the SPS30 datasheet and Sensirion's technical support resources.