Interfacing PMS5003 PM2.5 Air Quality Sensor with Arduino

Hi Alex, tried this with newer PMS7003 sensor and getting strange results, most are 10X over values from PM5003. I have adjusted pins to match 5003 and software is the same. Do you have any experience with the 7003? Thanks!

For the concentration values, it states that they are standard and environmental. Is there a specific unit for the concentration values? Thanks.

it also works on Mega but on different PINs. Have a closer look on SoftwareSerial-Library. I’m using A10 and A11, and it works fine for me.

Any clue on why arduino is not getting any data from the sensor? I can hear the sensor running, but it doesn’t communicate any data to the arduino

Hello Allam,
Thank you very much for this project, I am trying to build a multi sensor air quality meter, I used your example and now it is desplaying only 0, Other sensors SCD30 and BMP80 are working correctly
Im a a newbie on Arduiino so your help is much appreciated, here is my code:

// SCD30 + bmp280 + pms
#include <Adafruit_SCD30.h>
#include <SoftwareSerial.h>
SoftwareSerial pmsSerial(2,3);
Adafruit_SCD30 scd30;
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_BMP280.h>
#define BMP_SCK (13)
#define BMP_MISO (12)
#define BMP_MOSI (11)
#define BMP_CS (10;)
Adafruit_BMP280 bmp;// I2C

void setup(void) {
Serial.begin(115200);
while (!Serial) delay(10);
Serial.println(“Adafruit SCD30, BMP280 Y pms”);
// Try to initialize!
if (!bmp.begin()) {
Serial.println(F(“Could not find a valid BMP280 sensor, check wiring!”));
while (1);
}
if (!scd30.begin()) {
Serial.println(“Failed to find SCD30 chip”);
while (1) {
delay(10);
}
if (!scd30.startContinuousMeasurement()) {
Serial.println(“Failed to set ambient pressure offset”);
while (1) {
delay(10);
}
}
Serial.print(“Ambient pressure offset: “);
Serial.print(scd30.getAmbientPressureOffset());
Serial.println(” mBar”);
}
Serial.println(“SCD30 Found!”);

// if (!scd30.setMeasurementInterval(10)){
// Serial.println(“Failed to set measurement interval”);
// while(1){ delay(10);}
// }
Serial.print(“Measurement Interval: “);
Serial.print(scd30.getMeasurementInterval());
Serial.println(” seconds”);
};
struct pms5003data {
uint16_t framelen;
uint16_t pm10_standard, pm25_standard, pm100_standard;
uint16_t pm10_env, pm25_env, pm100_env;
uint16_t particles_03um, particles_05um, particles_10um, particles_25um, particles_50um, particles_100um;
uint16_t unused;
uint16_t checksum;
};

struct pms5003data data;

void loop() {
if (scd30.dataReady()) {
Serial.println(“Data available!”);
scd30.startContinuousMeasurement(bmp.readPressure()/100);

}
}

boolean readPMSdata(Stream *s) {
if (! s->available()) {
return false;
}

// Read a byte at a time until we get to the special ‘0x42’ start-byte
if (s->peek() != 0x42) {
s->read();
return false;
}

// Now read all 32 bytes
if (s->available() < 32) {
return false;
}

uint8_t buffer[32];
uint16_t sum = 0;
s->readBytes(buffer, 32);

// get checksum ready
for (uint8_t i=0; i<30; i++) {
sum += buffer[i];
}

/* debugging
for (uint8_t i=2; i<32; i++) {
Serial.print(“0x”); Serial.print(buffer[i], HEX); Serial.print(“, “);
}
Serial.println();
*/

// The data comes in endian’d, this solves it so it works on all platforms
uint16_t buffer_u16[15];
for (uint8_t i=0; i<15; i++) {
buffer_u16[i] = buffer[2 + i2 + 1];
buffer_u16[i] += (buffer[2 + i2] << 8);
}

// put it into a nice struct 🙂
memcpy((void *)&data, (void *)buffer_u16, 30);

if (sum != data.checksum) {
Serial.println(“Checksum failure”);
return false;
}
// success!
return true;
delay(2000);
};/*

*/

Heres is what the monitor is showing:
21:29:07.706 -> Data available!
21:29:07.706 -> —————————————
21:29:07.706 -> SCD30Temperature: 25.69 degrees C
21:29:07.706 -> BMP280Temperature = 24.28 *C
21:29:07.706 -> Relative Humidity: 29.17 %
21:29:07.706 -> Pressure = 782.88 mBar
21:29:07.706 -> CO2: 1237.405 ppm
21:29:07.706 -> Approx altitude = 2123.39 m
21:29:07.706 -> 782 mBar
21:29:07.706 -> Concentration Units (standard)
21:29:07.706 -> PM 1.0: 0 PM 2.5: 0 PM 10: 0
21:29:07.706 -> Concentration Units (environmental)
21:29:07.706 -> PM 1.0: 0 PM 2.5: 0 PM 10: 0
21:29:07.706 -> Particles > 0.3um / 0.1L air:0
21:29:07.706 -> Particles > 0.5um / 0.1L air:0
21:29:07.753 -> Particles > 1.0um / 0.1L air:0
21:29:07.753 -> Particles > 2.5um / 0.1L air:0
21:29:07.753 -> Particles > 5.0um / 0.1L air:0
21:29:07.753 -> Particles > 10.0 um / 0.1L air:0
21:29:07.753 -> —————————————

could someone send me the code with the i2c please

I was successful in following this tutorial. thanks, it was very well done and easy to follow.

I do have a couple of questions.
there are three sections in the serial display

data.pm10_standard
and
data.pm10_en
and
data.particles_10um

each outputs a different value. I don’t understand the differences and why they are all different.

hi ,this S K from west bengal
sir i am using this code form my project on my PMSA003-C Plantower Sensor it showing nothing please help me

Could you share your code, please it doesn’t work for me!!

did you find out whats the difference?

You state “Once the code is uploaded, you can open the serial monitor and set the baud rate to 9600”, but i think that is wrong. The connection to the sensor is 9600 baud but the connection to the serial monitor is 115200 baud.
Also, is there any specific reason why in one program you use a pms library and in the other you dont

Doesnt work. checked & double checked everything. PMS5003 is putting out data, as checked with a scope. The program is just not displaying any readings.