81 lines
2.1 KiB
Arduino
81 lines
2.1 KiB
Arduino
/*
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Arduino Dust Sensort
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connect the sensor as follows :
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VCC >>> 5V
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A >>> A0
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GND >>> GND
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Based on: http://www.dfrobot.com/wiki/index.php/Sharp_GP2Y1010AU
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Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
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Contribution: epierre
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COnverted to 1.4 by Henrik Ekblad
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The dust sensor used (see purchase guide for latest link):
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http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575069610&toolid=10001&campid=5337433187&customid=&icep_item=171259125886&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
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*/
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#include <MySensor.h>
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#include <SPI.h>
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#define CHILD_ID_DUST 0
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#define DUST_SENSOR_ANALOG_PIN 1
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unsigned long SLEEP_TIME = 30*1000; // Sleep time between reads (in milliseconds)
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//VARIABLES
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int val = 0; // variable to store the value coming from the sensor
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float valDUST =0.0;
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float lastDUST =0.0;
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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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MySensor gw;
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MyMessage dustMsg(CHILD_ID_DUST, V_DUST_LEVEL);
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void setup()
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{
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gw.begin();
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// Send the sketch version information to the gateway and Controller
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gw.sendSketchInfo("Dust Sensor", "1.1");
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// Register all sensors to gateway (they will be created as child devices)
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gw.present(CHILD_ID_DUST, S_DUST);
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}
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void loop()
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{
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uint16_t voMeasured = analogRead(DUST_SENSOR_ANALOG_PIN);// Get DUST value
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// 0 - 5V mapped to 0 - 1023 integer values
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// recover voltage
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calcVoltage = voMeasured * (5.0 / 1024.0);
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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("Raw Signal Value (0-1023): ");
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Serial.print(voMeasured);
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Serial.print(" - Voltage: ");
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Serial.print(calcVoltage);
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Serial.print(" - Dust Density: ");
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Serial.println(dustDensity); // unit: ug/m3
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if (ceil(dustDensity) != lastDUST) {
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gw.send(dustMsg.set((int)ceil(dustDensity)));
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lastDUST = ceil(dustDensity);
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}
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gw.sleep(SLEEP_TIME);
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}
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