Mikael Falkvidd
0b9af6d713
A while ago, MySensors changed to use int32_t instead of long int (and similar for other data types). This change was not applied to all examples, causing some examples to fail compilation for ESP8266 with the following message: call of overloaded 'set(long int)' is ambiguous This update changes the casts to match the new style. This fixes https://github.com/mysensors/MySensors/issues/1129 Thanks to https://github.com/henfri for reporting.
108 lines
3.3 KiB
Arduino
108 lines
3.3 KiB
Arduino
/**
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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 <henrik.ekblad@mysensors.org>
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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 accuracy 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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// Enable debug prints to serial monitor
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#define MY_DEBUG
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// Enable and select radio type attached
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#define MY_RADIO_NRF24
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//#define MY_RADIO_NRF5_ESB
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//#define MY_RADIO_RFM69
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//#define MY_RADIO_RFM95
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#include <MySensors.h>
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#define CHILD_ID_AIQ 0
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#define AIQ_SENSOR_ANALOG_PIN 6
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uint32_t 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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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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pinMode(AIQ_SENSOR_ANALOG_PIN, INPUT);
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}
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void presentation()
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{
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// Send the sketch version information to the gateway and Controller
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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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present(CHILD_ID_AIQ, S_AIR_QUALITY);
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send(msg2.set("ppm"));
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}
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void loop()
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{
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//uint32_t duration = pulseIn(AIQ_SENSOR_ANALOG_PIN, HIGH);
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while(digitalRead(AIQ_SENSOR_ANALOG_PIN) == HIGH) {
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;
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}
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//wait for the pin to go HIGH and measure HIGH time
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uint32_t 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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send(msg.set((int32_t)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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sleep(SLEEP_TIME); //sleep for: sleepTime
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}
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