Hello all!
I'am using a sharp dust sensor Gp2y1014au0f in my project. However, the code that I found shows the units in ug/m3 and I need to change to um / ft3. Someone can help me about this? Is it possible? I'am novice in arduino programming I do my firsts steps.
The Code: ( Credits for Igor Mesarec)
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///////////////////////////////////////////////////////
// Sharp GP2Y1014AU0F Dust Sensor
//
// Original code from "sharpsensoruser" on sharpsensoruser Β· GitHub - NICE WORK
// There is also a detailed description how the sensor work and some background on dust sensing Home Β· sharpsensoruser/sharp-sensor-demos Wiki Β· GitHub
//
// Modification to the program by "Igor Mesarec" Jan 2018
//
//
// Connections on GP2Y1014
// Pin 1 - starting from the pin closer to the sensor edge
// Pin 1 - V-Led
// Pin 2 - LED-GND
// Pin 3 - LED
// Pin 4 - S-GND
// Pin 5 - Vo
// Pin 6 - Vcc
//
// Board Connection:
// GP2Y1014 Arduino
// V-LED Between *R1 (150ohms) and **C1 (150uF) to 5v (arduino)
// LED-GND C1 and GND
// LED Pin 7
// S-GND GND
// Vo A5
// Vcc 5V
// *R1 - is connected betwen V-LED and 5V
// **C1 - is connected betwen Led-GND and V-LED
//
// connection scheme:
// ββββββββββββββββββ GP1Y1014 Conector βββββββββββββββββββ
// ββββββββββ¬βββββββββββββββββββββ¬βββββββββ¬βββββββββββ¬βββββββββ¬ββββββββββ¬βββββββ
// 1 2 3 4 5 6
// VβLED LEDβGND LED SβGND Vo Vcc
// β β β β β β
// β β β β β β
// ββββ(+)C1(β)βββββββββ€ β β β β
// β [220uF] β β β β β
// β β β β β β
// R1 β β β β β
// [150 ohms] β β β β β
// β β β β β β
// 5V GND PIN 7 GND A5 5V
// ββββββββββ΄ββββββββββββββββββββ΄ββββββββββ΄βββββββββββ΄βββββββββ΄ββββββββββ΄βββββββ
// ββββββββββββββββββ ARDUINO (UNO) ββββββββββββββββββββ
//
// Sensor information: dest sensing from 0 ug/m3 and 500 ug/m3
// Voc is 0.6 Volts for dust free acordind sensor spec
// sensitivity in units of V per 100ug/m3 (K = 0.5)--> 0.5 Volts/(100 ug/m3)
//
// LED Pulse Drive Circuit:
// LED pulsed on once every 10ms, pulse duration or width of 0.32ms.
// Once the LED is turned on sample the resulting analog output voltage after 0.28ms
//
// Serial monitor setting:
// 9600 baud
/////////////////////////////////////////////////////////////////////////////
// IGOR - dodaj da raΔuna stanje tudi za o,6V Voc - in potem raΔuna actual value
// Choose program options.
//#define PRINT_RAW_DATA //uncomet if you wont raw data displayed in serial monitor
#define USE_AVG //calculate average value in N mesared values
// Arduino pin numbers.
const int sharpLEDPin = 7; // Arduino digital pin 7 connect to sensor LED.
const int sharpVoPin = A5; // Arduino analog pin 5 connect to sensor Vo.
// For averaging last N raw voltage readings.
#ifdef USE_AVG
#define N 100
static unsigned long VoRawTotal = 0;
static int VoRawCount = 0;
#endif // USE_AVG
// Set the typical output voltage in Volts when there is zero dust.
static float Voc = 0.6; //Voc is 0.6 Volts for dust free acordind sensor spec
static float VocT = 0.6; //Self calibration overvrite the Coc with minimum measered value - this variable you need to have the treshold for the sensor (facturi calibration)
// Use the typical sensitivity in units of V per 100ug/m3.
const float K = 0.5;
/////////////////////////////////////////////////////////////////////////////
// Helper functions to print a data value to the serial monitor.
void printValue(String text, unsigned int value, bool isLast = false) {
Serial.print(text);
Serial.print("=");
Serial.print(value);
if (!isLast) {
Serial.print(", ");
}
}
void printFValue(String text, float value, String units, bool isLast = false) {
Serial.print(text);
Serial.print("=");
Serial.print(value);
Serial.print(units);
if (!isLast) {
Serial.print(", ");
}
else {
Serial.println();
}
}
/////////////////////////////////////////////////////////////////////////////
// Arduino setup function.
void setup() {
// Set LED pin for output.
pinMode(sharpLEDPin, OUTPUT);
// Start the hardware serial port for the serial monitor.
Serial.begin(9600);
// Wait two seconds for startup.
delay(2000);
Serial.println("");
Serial.println("GP2Y1014AU0F Demo");
Serial.println("=================");
VocT = Voc; //corect the VocT (to have alwas data for the initioal Voc
}
// Arduino main loop.
void loop() {
// Turn on the dust sensor LED by setting digital pin LOW.
digitalWrite(sharpLEDPin, LOW);
// Wait 0.28ms before taking a reading of the output voltage as per spec.
delayMicroseconds(280);
// Record the output voltage. This operation takes around 100 microseconds.
int VoRaw = analogRead(sharpVoPin);
// Turn the dust sensor LED off by setting digital pin HIGH.
digitalWrite(sharpLEDPin, HIGH);
// Wait for remainder of the 10ms cycle = 10000 - 280 - 100 microseconds.
delayMicroseconds(9620);
// Print raw voltage value (number from 0 to 1023).
#ifdef PRINT_RAW_DATA
printValue("VoRaw", VoRaw, true);
Serial.println("");
#endif // PRINT_RAW_DATA
// Use averaging if needed.
float Vo = VoRaw;
#ifdef USE_AVG
VoRawTotal += VoRaw;
VoRawCount++;
if ( VoRawCount >= N ) {
Vo = 1.0 * VoRawTotal / N;
VoRawCount = 0;
VoRawTotal = 0;
} else {
return;
}
#endif // USE_AVG
// Compute the output voltage in Volts.
Vo = Vo / 1024.0 * 5.0;
printFValue("Vo", Vo1000.0, "mV");
printFValue("Voc", Voc1000.0, "mV"); // Serial print the runtime min value for the Voc - minimal measered value of the Voc during the runtime - this is 0 dust
//------------ Dust density calculated by Voc set in the begining - like in sensor spec ------------
// Calculate Dust Density in units of ug/m3 for the initial Voc (as in sensor specs)
float dV = Vo - VocT;
if ( dV < 0 ) {
dV = 0;
}
float dustDensity = dV / K * 100.0;
String SPT1 = ""; // add this to serial print the set Voc
SPT1 = ("Dust Density(Voc ");
SPT1 += VocT;
SPT1 += (" V)");
printFValue(SPT1, dustDensity, "ug/m3", false); // Print the values
dV = 0; // Reset the dV to 0 for the next calculation
dustDensity = 0; // Reset the dustDensity to 0 for the next calculation
//------------ Dust density calculated by lowest output voltage during runtime ------------
// Convert to Dust Density in units of ug/m3.
// During runtime, the Voc value is updated dynamically whenever a lower output voltage is sense.
// this cover the dust sensing below the sensors specefied range from 0 to Voc (0,6V) as specified in the beginin
dV = Vo - Voc;
if ( dV < 0 ) {
dV = 0;
Voc = Vo;
}
dustDensity = dV / K * 100.0;
SPT1 = "";
SPT1 = ("Dust Density(Voc ");
SPT1 += Voc;
SPT1 += (" V)");
printFValue(SPT1, dustDensity, "ug/m3", true);
Serial.println("");
}
