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Gran_Oxogono.ino
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Gran_Oxogono.ino
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// Gran Oxógono - Medición de partículas volátiles (PM10, PM2.5)
// NOVIEMBRE 2020 - Silvia Teixeira @ Medialab-Prado
// Arduino UNO
// Sensor PM
// NeoPixel LED Strip, 1000uF capacitor, 470 Ohms Resistor
// 4 x AA Batteries + Zener Diode
#include <SoftwareSerial.h>
SoftwareSerial pmsSerial(2, 3);
#include <Adafruit_NeoPixel.h>
#define LED_PIN 6
#define LED_COUNT 400
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup() {
Serial.begin(9600);
pmsSerial.begin(9600);
strip.begin();
strip.show();
strip.setBrightness(50);
}
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 (readPMSdata(&pmsSerial)) {
// reading data was successful!
Serial.println();
Serial.println("---------------------------------------");
Serial.println("Concentración de partículas (ug/m3)");
Serial.print("PM 1.0: "); Serial.print(data.pm10_env);
Serial.print("\t\tPM 2.5: "); Serial.print(data.pm25_env);
Serial.print("\t\tPM 10: "); Serial.println(data.pm100_env);
Serial.println("---------------------------------------");
// Serial.print("Particles > 0.3um / 0.1L air:"); Serial.println(data.particles_03um);
// Serial.print("Particles > 0.5um / 0.1L air:"); Serial.println(data.particles_05um);
// Serial.print("Particles > 1.0um / 0.1L air:"); Serial.println(data.particles_10um);
// Serial.print("Particles > 2.5um / 0.1L air:"); Serial.println(data.particles_25um);
// Serial.print("Particles > 5.0um / 0.1L air:"); Serial.println(data.particles_50um);
// Serial.print("Particles > 10.0 um / 0.1L air:"); Serial.println(data.particles_100um);
// Serial.println("---------------------------------------");
mostrarLEDS();
delay(1000);
}
}
void mostrarLEDS(){
// VERDE OSCURO
if(data.pm25_env < 5){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(0, 255, 0));
strip.show();
delay (1);
}
}
// VERDE CLARO
else if(data.pm25_env >= 5 && data.pm25_env < 10){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(100, 255, 0));
strip.show();
delay (1);
}
}
// AMARILLO
else if(data.pm25_env >= 10 && data.pm25_env < 15){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(255, 255, 0));
strip.show();
delay (1);
}
}
// NARANJA
else if(data.pm25_env >= 15 && data.pm25_env < 20){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(255, 200, 0));
strip.show();
delay (1);
}
}
// MORADO
else if(data.pm25_env >= 20 && data.pm25_env < 25){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(255, 0, 0));
strip.show();
delay (1);
}
}
// ROJO
else if(data.pm25_env >= 25){
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(255, 0, 0));
strip.show();
delay (1);
}
}
else {
for(int i=0;i<strip.numPixels();i++){
strip.setPixelColor(i, strip.Color(0, 0, 255));
strip.show();
delay (1);
}
}
}
boolean readPMSdata(Stream *s) {
if (! s->available()) {
return false;
}
if (s->peek() != 0x42) {
s->read();
return false;
}
if (s->available() < 32) {
return false;
}
uint8_t buffer[32];
uint16_t sum = 0;
s->readBytes(buffer, 32);
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();
*/
uint16_t buffer_u16[15];
for (uint8_t i=0; i<15; i++) {
buffer_u16[i] = buffer[2 + i*2 + 1];
buffer_u16[i] += (buffer[2 + i*2] << 8);
}
memcpy((void *)&data, (void *)buffer_u16, 30);
if (sum != data.checksum) {
Serial.println("Checksum failure");
return false;
}
return true;
}