Plantower_PMS7003 Arduino Library

An Arduino library for interfacing with the Plantower PMS7003 laser particle counter. This should also work the the PMS5003 sensor, as they share the same protocol.

PMS7003

The PMS7003 is a particle matter counter capable of detecting particulates in the range of 0.3 to 10 microns.

This device uses a serial connection to send measurements to a connected device roughly once a second. Concentration measurements are provided for PM1.0 (0.3-1.0um), PM2.5 (1.0-2.5um), and PM10 (2.5-10.0um).

• Manufacturer Site
• Documentation (Mandarin)
• Review / Evaluation
• English Documentation for the 5003 (same protocol)
• Amazon Search (Roughly $40)

Interface

Interfacing with the device is via an atypical 1.27mm pitch 10-pin (2x5 row) male header. I recommend using an SWD breakout board and cable for easy prototyping--the pinout is totally different but they are easy to source. Here's what I used:

• Female-to-Female SWD Cable
• SWD Breakout Board

All of the data pins require a 3.3v TTL level, but power must be supplied to VCC at 5v, which is a requirement for proper operation of the built-in fan.

Pins are numbered as shown below. Pin 1 is at the top of the keyed side of the connector.

+5v VCC  1  2   +5v VCC
    GND  3  4   GND
  Reset  5  6   N/C
     RX  7  8   N/C
     TX  9  10  Set

Connecting the PMS7003 to a compatible 3.3v device requires 4 pins:

• Connect microcontroller +5v VCC or USB to pin 1 (VCC).
• Connect microcontroller GND to pin 3 (GND).
• Connect microcontroller TX to pin 7 (RX).
• Connect microcontroller RC to pin 9 (TX).

Usage

// Constructor
Plantower_PMS7003 sensor = Plantower_PMS7003();

void setup()
{
  // Initialize the sensor with the serial device
  // that it's connected to. Hardware Serial1 is the
  // default, if no parameter is provided to init()

  Serial1.begin(9600);    // Note: 9600 baud
  sensor.init(&Serial1);

}

void loop()
{
  // Use updateFrame() to read in sensor data in your
  // loop until hasNewData() returns true.
  sensor.updateFrame();

  // Note: once updateFrame() is called, all data is
  // invalid until hasNewData() returns true.
  if (sensor.hasNewData())
  {
    // PM1.0: getPM_1_0() 
    Serial.print("PM1.0: ");
    Serial.print(sensor.getPM_1_0());
    
    // PM2.5: getPM_2_5()
    Serial.print(" PM2.5: ");
    Serial.print(sensor.getPM_2_5());
    
    // PM10: getPM_10_0()
    Serial.print(" PM10: ");
    Serial.print(sensor.getPM_10_0());
    Serial.println();
  }

}

A full example can be found in pms_7003_test.ino.

License

This library was written by Jason Striegel and provided under the BSD license. See license.txt for details.