81 lines
2.6 KiB
Arduino
81 lines
2.6 KiB
Arduino
/*
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OpenMQTTGateway Addon - ESP8266 or Arduino program for home automation
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Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal and a MQTT broker
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Send and receiving command by MQTT
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DHT reading Addon
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Copyright: (c)Florian ROBERT
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Contributors:
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- prahjister
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- 1technophile
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This file is part of OpenMQTTGateway.
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OpenMQTTGateway is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenMQTTGateway is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef ZsensorDHT
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#include <DHT.h>
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#include <DHT_U.h>
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#define dht_always true // if false when the current value for temp or hum is the same as previous one don't send it by MQTT
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#define TimeBetweenReading 30000
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DHT dht(D3,DHT22); //on nodeMCU this is D3 GPIO0
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/*----------------------------USER PARAMETERS-----------------------------*/
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/*-------------DEFINE YOUR MQTT PARAMETERS BELOW----------------*/
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#define HUM1 "home/433toMQTT/dht1/hum"
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#define TEMP1 "home/433toMQTT/dht1/temp"
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//Time used to wait for an interval before resending temp and hum
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unsigned long timedht = 0;
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void MeasureTempAndHum(){
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if (millis() > (timedht + TimeBetweenReading)) {//retriving value of temperature and humidity of the box from DHT every xUL
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timedht = millis();
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static float persistedh;
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static float persistedt;
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float h = dht.readHumidity();
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// Read temperature as Celsius (the default)
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float t = dht.readTemperature();
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// Check if any reads failed and exit early (to try again).
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if (isnan(h) || isnan(t)) {
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trc(F("Failed to read from DHT sensor!"));
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}else{
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if(h != persistedh || dht_always){
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char hum[6];
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dtostrf(h,4,2,hum);
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trc(F("Sending Hum to MQTT"));
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trc(String(hum));
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client.publish(HUM1,hum);
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}else{
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trc(F("Same hum don't send it"));
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}
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if(t != persistedt || dht_always){
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char temp[6];
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dtostrf(t,4,2,temp);
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trc(F("Sending Temp to MQTT"));
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trc(String(temp));
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client.publish(TEMP1,temp);
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}else{
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trc(F("Same temp don't send it"));
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}
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}
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persistedh = h;
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persistedt = t;
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}
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}
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#endif
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