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henrikekbladhenrikekblad
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Merge pull request #165 from empierre/master
New sensors examples
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‎libraries/MySensors/examples/CO2Sensor/AirQualityCO2

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/**
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* The MySensors Arduino library handles the wireless radio link and protocol
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* between your home built sensors/actuators and HA controller of choice.
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* The sensors forms a self healing radio network with optional repeaters. Each
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* repeater and gateway builds a routing tables in EEPROM which keeps track of the
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* network topology allowing messages to be routed to nodes.
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*
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* Created by Henrik Ekblad <[email protected]>
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* Copyright (C) 2013-2015 Sensnology AB
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* Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
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*
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* Documentation: http://www.mysensors.org
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* Support Forum: http://forum.mysensors.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*******************************
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*
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* DESCRIPTION
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*
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* MH-Z14 CO2 sensor
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*
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* Wiring:
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* Pad 1, Pad 5: Vin (Voltage input 4.5V-6V)
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* Pad 2, Pad 3, Pad 12: GND
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* Pad 6: PWM output ==> pin 6
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*
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* From: http://davidegironi.blogspot.fr/2014/01/co2-meter-using-ndir-infrared-mh-z14.html
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* MH-Z14 has a PWM output, with a sensitivity range of 0ppm to 2000ppm CO2, an accurancy of ±200ppm.
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* The cycle is 1004ms±5%, given the duty cicle Th (pulse high), Tl is 1004-Th, we can convert it to CO2 value using the formula:
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* CO2ppm = 2000 * (Th - 2ms) /(Th + Tl - 4ms)
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* From: http://airqualityegg.wikispaces.com/Sensor+Tests
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* - response time is less than 30 s
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* - 3 minute warm up time
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* datasheet: http://www.futurlec.com/Datasheet/Sensor/MH-Z14.pdf
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* Contributor: epierre
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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_AIQ 0
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#define AIQ_SENSOR_ANALOG_PIN 6
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unsigned long SLEEP_TIME = 30*1000; // Sleep time between reads (in milliseconds)
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float valAIQ =0.0;
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float lastAIQ =0.0;
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MySensor gw;
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MyMessage msg(CHILD_ID_AIQ, V_LEVEL);
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MyMessage msg2(CHILD_ID_AIQ, V_UNIT_PREFIX);
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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("AIQ Sensor CO2 MH-Z14", "1.0");
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// Register all sensors to gateway (they will be created as child devices)
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gw.present(CHILD_ID_AIQ, S_AIR_QUALITY);
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gw.send(msg2.set("ppm"));
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gw.sleep(SLEEP_TIME);
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pinMode(AIQ_SENSOR_ANALOG_PIN, INPUT);
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}
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void loop() {
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//unsigned long duration = pulseIn(AIQ_SENSOR_ANALOG_PIN, HIGH);
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while(digitalRead(AIQ_SENSOR_ANALOG_PIN) == HIGH) {;}
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//wait for the pin to go HIGH and measure HIGH time
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unsigned long duration = pulseIn(AIQ_SENSOR_ANALOG_PIN, HIGH);
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//Serial.print(duration/1000); Serial.println(" ms ");
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//from datasheet
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//CO2 ppm = 2000 * (Th - 2ms) / (Th + Tl - 4ms)
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// given Tl + Th = 1004
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// Tl = 1004 - Th
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// = 2000 * (Th - 2ms) / (Th + 1004 - Th -4ms)
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// = 2000 * (Th - 2ms) / 1000 = 2 * (Th - 2ms)
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long co2ppm = 2 * ((duration/1000) - 2);
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//Serial.print(co2ppm);
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if ((co2ppm != lastAIQ)&&(abs(co2ppm-lastAIQ)>=10)) {
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gw.send(msg.set((long)ceil(co2ppm)));
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lastAIQ = ceil(co2ppm);
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}
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//Serial.println();
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// Power down the radio. Note that the radio will get powered back up
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// on the next write() call.
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gw.sleep(SLEEP_TIME); //sleep for: sleepTime
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}

‎libraries/MySensors/examples/DustSensorDSM/DustDSM501Sensor.ino

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/**
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* The MySensors Arduino library handles the wireless radio link and protocol
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* between your home built sensors/actuators and HA controller of choice.
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* The sensors forms a self healing radio network with optional repeaters. Each
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* repeater and gateway builds a routing tables in EEPROM which keeps track of the
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* network topology allowing messages to be routed to nodes.
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*
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* Created by Henrik Ekblad <[email protected]>
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* Copyright (C) 2013-2015 Sensnology AB
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* Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
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*
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* Documentation: http://www.mysensors.org
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* Support Forum: http://forum.mysensors.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*******************************
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*
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* DESCRIPTION
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*
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* Dust Sensor for SamYoung DSM501
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* connect the sensor as follows :
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* Pin 2 of dust sensor PM1 -> Digital 3 (PMW)
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* Pin 3 of dust sensor -> +5V
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* Pin 4 of dust sensor PM2.5 -> Digital 6 (PWM)
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* Pin 5 of dust sensor -> Ground
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* Datasheet: http://www.samyoungsnc.com/products/3-1%20Specification%20DSM501.pdf
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* Contributor: epierre
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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_PM10 0
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#define CHILD_ID_DUST_PM25 1
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#define DUST_SENSOR_DIGITAL_PIN_PM10 6
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#define DUST_SENSOR_DIGITAL_PIN_PM25 3
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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 valDUSTPM25 =0.0;
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float lastDUSTPM25 =0.0;
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float valDUSTPM10 =0.0;
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float lastDUSTPM10 =0.0;
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unsigned long duration;
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unsigned long starttime;
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unsigned long endtime;
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unsigned long sampletime_ms = 30000;
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unsigned long lowpulseoccupancy = 0;
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float ratio = 0;
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long concentrationPM25 = 0;
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long concentrationPM10 = 0;
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MySensor gw;
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MyMessage dustMsgPM10(CHILD_ID_DUST_PM10, V_LEVEL);
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MyMessage msgPM10(CHILD_ID_DUST_PM10, V_UNIT_PREFIX);
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MyMessage dustMsgPM25(CHILD_ID_DUST_PM25, V_LEVEL);
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MyMessage msgPM25(CHILD_ID_DUST_PM25, V_UNIT_PREFIX);
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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 DSM501", "1.4");
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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_PM10, S_DUST);
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gw.send(msgPM10.set("ppm"));
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gw.present(CHILD_ID_DUST_PM25, S_DUST);
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gw.send(msgPM25.set("ppm"));
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pinMode(DUST_SENSOR_DIGITAL_PIN_PM10,INPUT);
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pinMode(DUST_SENSOR_DIGITAL_PIN_PM25,INPUT);
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}
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void loop()
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{
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//get PM 2.5 density of particles over 2.5 μm.
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concentrationPM25=(long)getPM(DUST_SENSOR_DIGITAL_PIN_PM25);
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Serial.print("PM25: ");
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Serial.println(concentrationPM25);
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Serial.print("\n");
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if ((concentrationPM25 != lastDUSTPM25)&&(concentrationPM25>0)) {
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gw.send(dustMsgPM25.set((long)ceil(concentrationPM25)));
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lastDUSTPM25 = ceil(concentrationPM25);
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}
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//get PM 1.0 - density of particles over 1 μm.
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concentrationPM10=getPM(DUST_SENSOR_DIGITAL_PIN_PM10);
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Serial.print("PM10: ");
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Serial.println(concentrationPM10);
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Serial.print("\n");
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//ppmv=mg/m3 * (0.08205*Tmp)/Molecular_mass
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//0.08205 = Universal gas constant in atm·m3/(kmol·K)
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int temp=20; //external temperature, if you can replace this with a DHT11 or better
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long ppmv=(concentrationPM10*0.0283168/100/1000) * (0.08205*temp)/0.01;
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if ((ceil(concentrationPM10) != lastDUSTPM10)&&((long)concentrationPM10>0)) {
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gw.send(dustMsgPM10.set((long)ppmv));
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lastDUSTPM10 = ceil(concentrationPM10);
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}
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//sleep to save on radio
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gw.sleep(SLEEP_TIME);
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}
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long getPM(int DUST_SENSOR_DIGITAL_PIN) {
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starttime = millis();
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while (1) {
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duration = pulseIn(DUST_SENSOR_DIGITAL_PIN, LOW);
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lowpulseoccupancy += duration;
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endtime = millis();
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if ((endtime-starttime) > sampletime_ms)
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{
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ratio = (lowpulseoccupancy-endtime+starttime)/(sampletime_ms*10.0); // Integer percentage 0=>100
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long concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // using spec sheet curve
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//Serial.print("lowpulseoccupancy:");
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//Serial.print(lowpulseoccupancy);
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//Serial.print("\n");
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//Serial.print("ratio:");
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//Serial.print(ratio);
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//Serial.print("\n");
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//Serial.print("DSM501A:");
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//Serial.println(concentration);
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//Serial.print("\n");
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lowpulseoccupancy = 0;
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return(concentration);
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}
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}
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}

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