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mymaestromymaestro
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New dust sensor alternates
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3 files changed

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‎dustSensor/dustSensor.ino

Lines changed: 10 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,7 @@ A0: A/D: Dust Sensor Analog Signal
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D2: INT0 I/P: Dust Sensor Interrupt - Link to D9
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D9: Timer 1 OC1A PWM O/P: Dust Sensor Samples - Link to D2
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D10: Timer 1 OC1B PWM O/P: Dust Sensor LED Pulses
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LED Power: 5V to device pin 1 through a 150ohm resistor
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*/
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#define VOLTAGE 5.0 // Arduino supply voltage
@@ -106,15 +107,19 @@ void loop() // run over and over again
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float latest_dust = latest_reading * (VOLTAGE / 1023.0);
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float average_dust = average_reading * (VOLTAGE/ 1023.0);
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/* For text to the serial console
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Serial.print("Latest Dust Reading (V): ");
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/* For text to the serial console */
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Serial.print("TIMER1: ");
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Serial.print("Voltage: ");
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Serial.print(latest_dust);
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Serial.print("\t\tAverage Dust Reading (V): ");
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Serial.print("\t - Latest reading: ");
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Serial.print(latest_reading);
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Serial.print("\tAverage Dust Reading (V): ");
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Serial.println(average_dust);
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*/
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/* For data for the Serial plotter */
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/* For data for the Serial plotter
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Serial.print(latest_dust);
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Serial.print("\t");
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Serial.println(average_dust);
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*/
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}
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}

‎dustSensor_noInt/dustSensor_noInt.ino

Lines changed: 62 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,62 @@
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/*
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Standalone Sketch to use with a Arduino Fio and a
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Sharp Optical Dust Sensor GP2Y1010AU0F
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Blog: http://arduinodev.woofex.net/2012/12/01/standalone-sharp-dust-sensor/
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Code: https://github.com/Trefex/arduino-airquality/
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For Pin connections, please check the Blog or the github project page
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Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
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Changelog:
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2012-Dec-01: Cleaned up code
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2012-Dec-13: Converted mg/m3 to ug/m3 which seems to be the accepted standard
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This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
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To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter
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to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
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*/
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#define VOLTAGE 5.0 // Arduino supply voltage
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int measurePin = A0;
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int ledPower = 10;
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int samplingTime = 280;
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int deltaTime = 40;
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int sleepTime = 9680;
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float voMeasured = 0;
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float calcVoltage = 0;
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float dustDensity = 0;
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void setup(){
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Serial.begin(115200);
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pinMode(ledPower,OUTPUT);
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}
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void loop(){
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digitalWrite(ledPower,LOW); // power on the LED
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delayMicroseconds(samplingTime);
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voMeasured = analogRead(measurePin); // read the dust value
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delayMicroseconds(deltaTime);
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digitalWrite(ledPower,HIGH); // turn the LED off
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delayMicroseconds(sleepTime);
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// 0 - 5.0V mapped to 0 - 1023 integer values
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calcVoltage = voMeasured * (VOLTAGE / 1024);
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// linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
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// Chris Nafis (c) 2012
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dustDensity = (0.17 * calcVoltage - 0.1)*1000;
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Serial.print("delayMu(): ");
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Serial.print("Voltage: ");
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Serial.print(calcVoltage);
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Serial.print("\t Latest reading: ");
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Serial.print(voMeasured);
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Serial.print("\t Dust Density [ug/m3]: ");
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Serial.println(dustDensity);
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delay(1000);
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}

‎dustSensor_noInt2/dustSensor_noInt2.ino

Lines changed: 100 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,100 @@
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/*
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Standalone Sketch to use with a Arduino Fio and a
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Sharp Optical Dust Sensor GP2Y1010AU0F
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Blog: http://arduinodev.woofex.net/2012/12/01/standalone-sharp-dust-sensor/
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Code: https://github.com/Trefex/arduino-airquality/
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For Pin connections, please check the Blog or the github project page
8+
Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
9+
Changelog:
10+
2012-Dec-01: Cleaned up code
11+
2012-Dec-13: Converted mg/m3 to ug/m3 which seems to be the accepted standard
12+
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
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To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter
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to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
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*/
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#define VOLTAGE 5.0 // Arduino supply voltage
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int measurePin = A0;
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int ledPower = 10;
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int samplingTime = 280;
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int deltaTime = 40;
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int sleepTime = 9680;
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float voMeasured = 0;
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float calcVoltage = 0;
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float dustDensity = 0;
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const int numReadings = 100; // samples are taken at 100Hz so calculate average over 1sec
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int readings[numReadings]; // the readings from the analog input
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int readIndex = 0; // the index of the current reading
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long int total = 0; // the running total
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int latest_reading = 0; // the latest reading
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int average_reading = 0; // the average reading
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void setup(){
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Serial.begin(115200);
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pinMode(ledPower,OUTPUT);
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// Initialise sample buffer
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for (int thisReading = 0; thisReading < numReadings; thisReading++) {
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readings[thisReading] = 0;
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}
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}
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// Dust sample interrupt service routine
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void takeReading() {
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// subtract the last reading:
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total = total - readings[readIndex];
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// read from the sensor:
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latest_reading = analogRead(dustPin);
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readings[readIndex] = latest_reading;
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// add the reading to the total:
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total = total + latest_reading;
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// advance to the next position in the array:
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readIndex = readIndex + 1;
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// if we're at the end of the array...wrap around to the beginning:
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if (readIndex >= numReadings) readIndex = 0;
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// calculate the average:
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average_reading = total / numReadings; // Seems to work OK with integer maths - but total does need to be long int
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}
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uint32_t timer = millis();
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void loop(){
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// if millis() or timer wraps around, we'll just reset it
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if (timer > millis()) timer = millis();
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// approximately every second or so, print out the dust reading
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if (millis() - timer > 1000) {
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timer = millis(); // reset the timer
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digitalWrite(ledPower,LOW); // power on the LED
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delayMicroseconds(samplingTime);
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//voMeasured = analogRead(measurePin); // read the dust value
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delayMicroseconds(deltaTime);
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digitalWrite(ledPower,HIGH); // turn the LED off
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delayMicroseconds(sleepTime);
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// 0 - 5.0V mapped to 0 - 1023 integer values
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calcVoltage = latest_reading * (VOLTAGE / 1023.0);
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// linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
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// Chris Nafis (c) 2012
88+
dustDensity = (0.17 * calcVoltage - 0.1)*1000;
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Serial.print("delayMu(): ");
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Serial.print("Voltage: ");
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Serial.print(latest_reading);
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Serial.print("\t - A0: ");
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Serial.print(calcVoltage);
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Serial.print(" - Dust Density [ug/m3]: ");
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Serial.println(dustDensity);
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}
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}

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