126 lines
3.6 KiB
Arduino
126 lines
3.6 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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This is the Climate Addon:
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- Measures Temperature, Humidity and Pressure
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- Generates Values for: Temperature in degrees C and F, Humidity in %, Pressure in Pa, Altitude in Meter and Feet
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- Required Hardware Module: HTU21
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- Required Library: SparkFun HTU21 Library v1.1.3
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Connection Schemata:
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--------------------
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HTU21 ------> Arduino Uno ----------> ESP8266
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==============================================
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Vcc ---------> 5V -------------------> Vu (5V)
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GND ---------> GND ------------------> GND
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SCL ---------> Pin A5 ---------------> D1
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SDA ---------> Pin A4 ---------------> D2
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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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#include "User_config.h"
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#ifdef ZsensorHTU21
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#include "Wire.h" // Library for communication with I2C / TWI devices
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#include <stdint.h>
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#include "SparkFunHTU21D.h"
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#include "config_HTU21.h"
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//Time used to wait for an interval before resending measured values
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unsigned long timehtu21 = 0;
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//Global sensor object
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HTU21D htuSensor;
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void setupZsensorHTU21()
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{
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delay(10); // Gives the Sensor enough time to turn on
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Log.notice(F("HTU21 Initialized - begin()" CR));
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#if defined(ESP32)
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Wire.begin(I2C_SDA, I2C_SCL);
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htuSensor.begin(Wire);
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#else
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htuSensor.begin();
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#endif
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}
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void MeasureTempHum()
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{
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if (millis() > (timehtu21 + TimeBetweenReadinghtu21))
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{
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Log.trace(F("Read HTU21 Sensor" CR));
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timehtu21 = millis();
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static float persisted_htu_tempc;
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static float persisted_htu_hum;
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float HtuTempC = htuSensor.readTemperature();
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float HtuHum = htuSensor.readHumidity();
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if (HtuTempC >= 998 || HtuHum >= 998 )
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{
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Log.error(F("Failed to read from sensor HTU21!" CR));
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return;
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}
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// Check if reads failed and exit early (to try again).
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if (isnan(HtuTempC) || isnan(HtuHum))
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{
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Log.error(F("Failed to read from sensor HTU21!" CR));
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}
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else
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{
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Log.notice(F("Creating HTU21 buffer" CR));
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StaticJsonBuffer<JSON_MSG_BUFFER> jsonBuffer;
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JsonObject &HTU21data = jsonBuffer.createObject();
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// Generate Temperature in degrees C
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if (HtuTempC != persisted_htu_tempc || htu21_always)
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{
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float HtuTempF = (HtuTempC*1.8)+32;
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HTU21data.set("tempc", (float)HtuTempC);
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HTU21data.set("tempf", (float)HtuTempF);
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}
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else
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{
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Log.notice(F("Same Temp. Don't send it" CR));
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}
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// Generate Humidity in percent
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if (HtuHum != persisted_htu_hum || htu21_always)
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{
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HTU21data.set("hum", (float)HtuHum);
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}
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else
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{
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Log.notice(F("Same Humidity. Don't send it" CR));
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}
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if (HTU21data.size() > 0)
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pub(HTUTOPIC, HTU21data);
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}
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persisted_htu_tempc = HtuTempC;
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persisted_htu_hum = HtuHum;
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}
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}
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#endif
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