How to Use PMS5003 Board: Examples, Pinouts, and Specs

The PMS5003 Board is a compact and highly accurate air quality sensor designed to measure particulate matter (PM1.0, PM2.5, and PM10) concentrations in the air. It employs advanced laser scattering technology to detect and quantify airborne particles, making it an essential tool for environmental monitoring, air purifiers, HVAC systems, and indoor air quality assessments.

This sensor is widely used in applications such as:

• Smart home air quality monitoring systems
• Industrial and environmental pollution monitoring
• Air purifiers and HVAC systems
• Research and development in air quality studies

The PMS5003 Board is designed for precision and reliability. Below are its key technical details:

The PMS5003 Board has a 7-pin connector for interfacing. Below is the pinout description:

1. Power Supply: Connect the VCC pin to a 5V power source and the GND pin to ground.
2. UART Communication: Connect the TX pin of the PMS5003 to the RX pin of your microcontroller (e.g., Arduino UNO) and the RX pin of the PMS5003 to the TX pin of the microcontroller.
3. Standby Mode: The SET pin can be used to put the sensor into standby mode by pulling it low. Leave it unconnected or pull it high for normal operation.
4. Reset: The RESET pin can be used to reset the sensor by pulling it low momentarily.

• Placement: Ensure the sensor is placed in an area with good airflow for accurate readings. Avoid placing it near sources of vibration or strong airflow, as this may affect measurements.
• Warm-Up Time: Allow the sensor to warm up for at least 30 seconds after powering it on to ensure stable readings.
• UART Logic Level: The PMS5003 operates at 3.3V logic levels. If using a 5V microcontroller, use a level shifter to avoid damaging the sensor.

Below is an example of how to interface the PMS5003 with an Arduino UNO to read PM2.5 data:

#include <SoftwareSerial.h>

// Define the PMS5003 TX and RX pins connected to Arduino
SoftwareSerial pmsSerial(10, 11); // RX, TX

// Buffer to store incoming data from the PMS5003
uint8_t pmsData[32];

void setup() {
  Serial.begin(9600);          // Initialize serial monitor
  pmsSerial.begin(9600);       // Initialize PMS5003 UART communication
  Serial.println("PMS5003 Sensor Initialized");
}

void loop() {
  if (pmsSerial.available() >= 32) { // Check if 32 bytes of data are available
    for (int i = 0; i < 32; i++) {
      pmsData[i] = pmsSerial.read(); // Read data into buffer
    }

    // Verify data header
    if (pmsData[0] == 0x42 && pmsData[1] == 0x4D) {
      // Extract PM2.5 concentration (bytes 12 and 13)
      uint16_t pm25 = (pmsData[12] << 8) | pmsData[13];
      Serial.print("PM2.5 Concentration: ");
      Serial.print(pm25);
      Serial.println(" µg/m³");
    }
  }
}

• Connect the PMS5003 TX pin to Arduino pin 10 and RX pin to Arduino pin 11.
• Use a level shifter if your Arduino operates at 5V logic levels.

1. No Data Output:

   • Ensure the sensor is properly powered (check VCC and GND connections).
   • Verify the UART connections (TX and RX pins) and ensure they are not swapped.
   • Check the baud rate (default is 9600 bps).

2. Inaccurate Readings:

   • Ensure the sensor is placed in a stable environment with good airflow.
   • Avoid exposing the sensor to high humidity or condensation.

3. Sensor Not Responding:

   • Check if the SET pin is pulled low (standby mode). Pull it high or leave it unconnected for normal operation.
   • Reset the sensor using the RESET pin.

Q: Can the PMS5003 detect gases like CO2 or VOCs?
A: No, the PMS5003 is designed to measure particulate matter (PM1.0, PM2.5, and PM10) and cannot detect gases.

Q: How often should the sensor be calibrated?
A: The PMS5003 is factory-calibrated and does not require user calibration. However, periodic cleaning of the air inlet and outlet may help maintain accuracy.

Q: Can I use the PMS5003 with a 5V microcontroller?
A: Yes, but you must use a level shifter for the UART communication pins (TX and RX) to avoid damaging the sensor.

Q: What is the lifespan of the PMS5003?
A: The sensor has an estimated lifespan of 3 years under normal operating conditions.