Arduino - PM2.5 Sensor
This tutorial goes over how to use the Plantower PMS7003 PM2.5 Sensor 💨!
- (1) PM2.5 Sensor (Plantower PMS7003)
- (1) G7 Switch Adapter
- (11) Jumper wires
- (1) ESP8266 Wi-Fi Microcontroller (NodeMCU v3)
For refrence I have included the pinout diagram for the ESP8266 Wi-Fi Microcontroller (NodeMCU v3) that I am using.
Setup
Code
For this project we are using the following libraries:
- Adafruit_GFX
- Adafruit_ILI9341
- Adafruit_PM25AQI
For information on how to install the libraries above please visist https://www.arduino.cc/en/guide/libraries.
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "Adafruit_PM25AQI.h"
#define TFT_DC 5 // D1
#define TFT_RST 0 // D3
#define TFT_CS 4 // D2
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
#include <SoftwareSerial.h>
SoftwareSerial pmSerial(2, 3);
Adafruit_PM25AQI aqi = Adafruit_PM25AQI();
#define pmsDataLen 32
uint8_t buf[pmsDataLen];
int idx = 0;
int pm10 = 0;
int last_pm25 = 0;
int pm25 = 0;
int pm100 = 0;
uint16_t pm25color[] = {
0x9FF3,
0x37E0,
0x3660,
0xFFE0,
0xFE60,
0xFCC0,
0xFB2C,
0xF800,
0x9800,
0xC99F
};
void setup() {
Serial.begin(115200);
while (!Serial) delay(10);
// Wait one second for sensor to boot up!
delay(1000);
pmSerial.begin(9600);
if (! aqi.begin_UART(&pmSerial)) {
Serial.println("Could not find PM 2.5 sensor!");
while (1) delay(10);
}
Serial.println("PM25 found!");
tft.begin();
drawPictureFrames();
}
void loop() {
PM25_AQI_Data data;
if (! aqi.read(&data)) {
Serial.println("Could not read from AQI");
delay(500); // try again in a bit!
return;
}
// This is used for debugging purposes and to show what additional data could potentially be rendered
Serial.println(F("---------------------------------------"));
Serial.println(F("Concentration Units (standard)"));
Serial.println(F("---------------------------------------"));
Serial.print(F("PM 1.0: ")); Serial.print(data.pm10_standard);
Serial.print(F("\t\tPM 2.5: ")); Serial.print(data.pm25_standard);
Serial.print(F("\t\tPM 10: ")); Serial.println(data.pm100_standard);
Serial.println(F("Concentration Units (environmental)"));
Serial.println(F("---------------------------------------"));
Serial.print(F("PM 1.0: ")); Serial.print(data.pm10_env);
Serial.print(F("\t\tPM 2.5: ")); Serial.print(data.pm25_env);
Serial.print(F("\t\tPM 10: ")); Serial.println(data.pm100_env);
Serial.println(F("---------------------------------------"));
Serial.print(F("Particles > 0.3um / 0.1L air:")); Serial.println(data.particles_03um);
Serial.print(F("Particles > 0.5um / 0.1L air:")); Serial.println(data.particles_05um);
Serial.print(F("Particles > 1.0um / 0.1L air:")); Serial.println(data.particles_10um);
Serial.print(F("Particles > 2.5um / 0.1L air:")); Serial.println(data.particles_25um);
Serial.print(F("Particles > 5.0um / 0.1L air:")); Serial.println(data.particles_50um);
Serial.print(F("Particles > 50 um / 0.1L air:")); Serial.println(data.particles_100um);
Serial.println(F("---------------------------------------"));
pm10 = data.pm10_standard;
last_pm25 = pm25;
pm25 = data.pm25_standard;
pm100 = data.pm100_standard;
updateValueToTftScreen();
}
void drawPictureFrames() {
tft.setRotation(1);
tft.fillScreen(ILI9341_BLACK);
tft.setTextSize(1);
// Upper title
tft.setTextSize(1);
tft.setCursor(20, 20);
tft.print("PM2.5 DETECTOR");
// PM 2.5 Circle Frame
tft.drawCircle(100, 130, 60, ILI9341_BLUE);
tft.drawCircle(100, 130, 61, ILI9341_BLUE);
tft.setTextSize(1);
tft.setCursor(90, 85);
tft.print("PM2.5");
tft.setTextSize(1);
tft.setCursor(90, 170);
tft.print("um/m3");
// PM 10 Circle Frame
tft.drawCircle(220, 70, 40, ILI9341_BLUE);
tft.setTextSize(1);
tft.setCursor(210, 40);
tft.print("PM10");
tft.setTextSize(1);
tft.setCursor(205, 95);
tft.print("um/m3");
// PM 1.0 Circle Frame
tft.drawCircle(220, 170, 40, ILI9341_BLUE);
tft.setTextSize(1);
tft.setCursor(205, 140);
tft.print("PM1.0");
tft.setTextSize(1);
tft.setCursor(205, 195);
tft.print("um/m3");
tft.fillRect(290, 30 + 0 * 2, 10, 12 * 2, pm25color[0]); // 0~11
tft.fillRect(290, 30 + 12 * 2, 10, 12 * 2, pm25color[1]); // 12-23
tft.fillRect(290, 30 + 24 * 2, 10, 12 * 2, pm25color[2]); // 24-35
tft.fillRect(290, 30 + 36 * 2, 10, 6 * 2, pm25color[3]); // 36-41
tft.fillRect(290, 30 + 42 * 2, 10, 6 * 2, pm25color[4]); // 42-47
tft.fillRect(290, 30 + 48 * 2, 10, 6 * 2, pm25color[5]); // 48-53
tft.fillRect(290, 30 + 54 * 2, 10, 6 * 2, pm25color[6]); // 54-58
tft.fillRect(290, 30 + 59 * 2, 10, 6 * 2, pm25color[7]); // 59-64
tft.fillRect(290, 30 + 65 * 2, 10, 6 * 2, pm25color[8]); // 65-70
tft.fillRect(290, 30 + 71 * 2, 10, 10 * 2, pm25color[9]); // >=71
tft.setCursor(302, 30);
tft.setTextSize(1);
tft.print("0");
tft.setCursor(302, 30 + 36 * 2);
tft.print("36");
tft.setCursor(302, 30 + 54 * 2);
tft.print("54");
tft.setCursor(302, 30 + 71 * 2);
tft.print("71");
updateValueToTftScreen();
}
void updateValueToTftScreen() {
tft.setCursor(60, 111);
tft.setTextSize(5);
tft.setTextColor(getPm25Color(pm25), ILI9341_BLACK);
if (pm25 < 10) {
tft.print(" ");
} else if (pm25 < 100) {
tft.print(" ");
}
tft.print(pm25);
tft.setCursor(195, 60);
tft.setTextSize(3);
if (pm100 < 10) {
tft.print(" ");
} else if (pm100 < 100) {
tft.print(" ");
}
tft.print(pm100);
tft.setCursor(198, 160);
if (pm10 < 10) {
tft.print(" ");
} else if (pm10 < 100) {
tft.print(" ");
}
tft.print(pm10);
tft.setTextSize(1);
tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
if (last_pm25 > 80) {
tft.fillRect(275, 80 * 2 + 30 - 3, 12, 8, ILI9341_BLACK);
} else {
tft.fillRect(275, last_pm25 * 2 + 30 - 3, 12, 8, ILI9341_BLACK);
}
if (pm25 > 80) {
tft.setCursor(275, 80 * 2 + 30 - 3);
} else {
tft.setCursor(275, pm25 * 2 + 30 - 3);
}
tft.print("=>");
}
uint16_t getPm25Color(int v) {
if (v < 12) {
return pm25color[0];
} else if (v < 24) {
return pm25color[1];
} else if (v < 36) {
return pm25color[2];
} else if (v < 42) {
return pm25color[3];
} else if (v < 48) {
return pm25color[4];
} else if (v < 54) {
return pm25color[5];
} else if (v < 59) {
return pm25color[6];
} else if (v < 65) {
return pm25color[7];
} else if (v < 71) {
return pm25color[8];
} else {
return pm25color[9];
}
}
