diff --git a/docs/setitup/sensors.md b/docs/setitup/sensors.md
index f7d394c..935c1c1 100644
--- a/docs/setitup/sensors.md
+++ b/docs/setitup/sensors.md
@@ -7,6 +7,7 @@
|HCSR501|PIR|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
|BH1750|Digital light|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
|BME280|Temperature, Humidity and pressure|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
+|HTU21|Temperature, Humidity|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
|GPIO Input|Inputs|-|
|GPIO KeyCode|Keycode|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
|INA226|Current and voltage|[parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
@@ -22,6 +23,8 @@
|BH1750 SCL|A5|D1|22|
|BME280 SDA|A4|D2|21|
|BME280 SCL|A5|D1|22|
+|HTU21 SDA|A4|D2|21|
+|HTU21 SCL|A5|D1|22|
|INA226 SDA|A4|D2|21|
|INA226 SCL|A5|D1|22|
|TSL2561 SDA|A4|D2|21|
diff --git a/docs/use/sensors.md b/docs/use/sensors.md
index 07caac5..3ada367 100644
--- a/docs/use/sensors.md
+++ b/docs/use/sensors.md
@@ -4,7 +4,7 @@ Subscribe to all the messages with mosquitto or open your MQTT client software:
` sudo mosquitto_sub -t +/# -v`
### ADC
-The value is between 0 and 1024 and is tranmitted via Mqtt when it changes.
+The value is between 0 and 1024 and is tranmitted via Mqtt when it changes.
`home/OpenMQTTGateway/DHTtoMQTT {"value":543}`
### DHT
@@ -12,4 +12,11 @@ You will receive every TimeBetweenReadingDHT (set into config_DHT.h) the DHT mea
`home/OpenMQTTGateway/DHTtoMQTT {"temp":21,"hum":51}`
-If you want to don't resend value when it is the same you can set dht_always = false in config_DHT.h
\ No newline at end of file
+If you want to don't resend value when it is the same you can set dht_always = false in config_DHT.h
+
+### HTU21
+You will receive the HTU21 sensor readings every TimeBetweenReadinghtu21 (set into config_HTU21.h) (30s by default).
+
+`home/OpenMQTTGateway/CLIMAtoMQTT/htu {"tempc":25.34064,"tempf":77.61314,"hum":56.53052}`
+
+If you don't want to resend values that haven't changed you can set htu21_always = false in config_HTU21.h
\ No newline at end of file
diff --git a/main/User_config.h b/main/User_config.h
index e77678a..9c7c3b3 100644
--- a/main/User_config.h
+++ b/main/User_config.h
@@ -170,6 +170,7 @@ int low_power_mode = DEFAULT_LOW_POWER_MODE;
//#define ZsensorBH1750 "BH1750" //ESP8266, Arduino, ESP32
//#define ZsensorTSL2561 "TSL2561" //ESP8266, Arduino, ESP32
//#define ZsensorBME280 "BME280" //ESP8266, Arduino, ESP32
+//#define ZsensorHTU21 "HTU21" //ESP8266, Arduino, ESP32
//#define ZsensorDHT "DHT" //ESP8266, Arduino, ESP32, Sonoff RF Bridge
//#define ZsensorDS1820 "DS1820" //ESP8266, Arduino, ESP32
//#define ZsensorGPIOKeyCode "GPIOKeyCode" //ESP8266, Arduino, ESP32
diff --git a/main/ZmqttDiscovery.ino b/main/ZmqttDiscovery.ino
index 6b0ef62..ed43adc 100644
--- a/main/ZmqttDiscovery.ino
+++ b/main/ZmqttDiscovery.ino
@@ -182,6 +182,28 @@ void pubMqttDiscovery()
}
#endif
+#ifdef ZsensorHTU21
+#define HTUparametersCount 3
+ Log.trace(F("htu21Discovery" CR));
+ char *HTUsensor[HTUparametersCount][8] = {
+ {"sensor", "tempc", "htu", "temperature", "{{ value_json.tempc }}", "", "", "°C"},
+ {"sensor", "tempf", "htu", "temperature", "{{ value_json.tempf }}", "", "", "°F"},
+ {"sensor", "hum", "htu", "humidity", "{{ value_json.hum }}", "", "", "%"}
+ //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
+ };
+
+ for (int i = 0; i < HTUparametersCount; i++)
+ {
+ Log.trace(F("CreateDiscoverySensor" CR));
+ //trc(HTUsensor[i][1]);
+ createDiscovery(HTUsensor[i][0],
+ HTUTOPIC, HTUsensor[i][1], (char *)getUniqueId(HTUsensor[i][1], HTUsensor[i][2]).c_str(),
+ will_Topic, HTUsensor[i][3], HTUsensor[i][4],
+ HTUsensor[i][5], HTUsensor[i][6], HTUsensor[i][7],
+ 0, "", "", true, "");
+ }
+#endif
+
#ifdef ZsensorDHT
#define DHTparametersCount 2
Log.trace(F("DHTDiscovery" CR));
diff --git a/main/ZsensorHTU21.ino b/main/ZsensorHTU21.ino
new file mode 100644
index 0000000..513147e
--- /dev/null
+++ b/main/ZsensorHTU21.ino
@@ -0,0 +1,125 @@
+/*
+ OpenMQTTGateway Addon - ESP8266 or Arduino program for home automation
+
+ Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal and a MQTT broker
+ Send and receiving command by MQTT
+
+ This is the Climate Addon:
+ - Measures Temperature, Humidity and Pressure
+ - Generates Values for: Temperature in degrees C and F, Humidity in %, Pressure in Pa, Altitude in Meter and Feet
+ - Required Hardware Module: HTU21
+ - Required Library: SparkFun HTU21 Library v1.1.3
+
+ Connection Schemata:
+ --------------------
+
+ HTU21 ------> Arduino Uno ----------> ESP8266
+ ==============================================
+ Vcc ---------> 5V -------------------> Vu (5V)
+ GND ---------> GND ------------------> GND
+ SCL ---------> Pin A5 ---------------> D1
+ SDA ---------> Pin A4 ---------------> D2
+
+ This file is part of OpenMQTTGateway.
+
+ OpenMQTTGateway is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenMQTTGateway is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+*/
+#include "User_config.h"
+
+#ifdef ZsensorHTU21
+#include "Wire.h" // Library for communication with I2C / TWI devices
+#include
+#include "SparkFunHTU21D.h"
+#include "config_HTU21.h"
+
+//Time used to wait for an interval before resending measured values
+unsigned long timehtu21 = 0;
+
+//Global sensor object
+HTU21D htuSensor;
+
+void setupZsensorHTU21()
+{
+ delay(10); // Gives the Sensor enough time to turn on
+ Log.notice(F("HTU21 Initialized - begin()" CR));
+
+#if defined(ESP32)
+ Wire.begin(I2C_SDA, I2C_SCL);
+ htuSensor.begin(Wire);
+#else
+#endif
+ htuSensor.begin();
+}
+
+void MeasureTempHum()
+{
+
+ if (millis() > (timehtu21 + TimeBetweenReadinghtu21))
+ {
+ Log.trace(F("Read HTU21 Sensor" CR));
+
+ timehtu21 = millis();
+ static float persisted_htu_tempc;
+ static float persisted_htu_hum;
+
+ float HtuTempC = htuSensor.readTemperature();
+ float HtuHum = htuSensor.readHumidity();
+
+ if (HtuTempC >= 998 || HtuHum >= 998 )
+ {
+ Log.error(F("Failed to read from sensor HTU21!" CR));
+ return;
+ }
+
+ // Check if reads failed and exit early (to try again).
+ if (isnan(HtuTempC) || isnan(HtuHum))
+ {
+ Log.error(F("Failed to read from sensor HTU21!" CR));
+ }
+ else
+ {
+ Log.notice(F("Creating HTU21 buffer" CR));
+ StaticJsonBuffer jsonBuffer;
+ JsonObject &HTU21data = jsonBuffer.createObject();
+ // Generate Temperature in degrees C
+ if (HtuTempC != persisted_htu_tempc || htu21_always)
+ {
+ float HtuTempF = (HtuTempC*1.8)+32;
+ HTU21data.set("tempc", (float)HtuTempC);
+ HTU21data.set("tempf", (float)HtuTempF);
+ }
+ else
+ {
+ Log.notice(F("Same Temp. Don't send it" CR));
+ }
+
+ // Generate Humidity in percent
+ if (HtuHum != persisted_htu_hum || htu21_always)
+ {
+ HTU21data.set("hum", (float)HtuHum);
+ }
+ else
+ {
+ Log.notice(F("Same Humidity. Don't send it" CR));
+ }
+
+ if (HTU21data.size() > 0)
+ pub(HTUTOPIC, HTU21data);
+ }
+ persisted_htu_tempc = HtuTempC;
+ persisted_htu_hum = HtuHum;
+ }
+}
+
+#endif
diff --git a/main/config_HTU21.h b/main/config_HTU21.h
new file mode 100644
index 0000000..1cca815
--- /dev/null
+++ b/main/config_HTU21.h
@@ -0,0 +1,56 @@
+/*
+ OpenMQTTGateway Addon - ESP8266 or Arduino program for home automation
+
+ Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal and a MQTT broker
+ Send and receiving command by MQTT
+
+ This is the Climate Addon:
+ - Measures Temperature, Humidity and Pressure
+ - Generates Values for: Temperature in degrees C and F, Humidity in %, Pressure in Pa, Altitude in Meter and Feet
+ - Required Hardware Module: HTU21
+ - Required Library: SparkFun HTU21 Library v1.1.3
+
+ Connection Schemata:
+ --------------------
+
+ HTU21 ------> Arduino Uno ----------> ESP8266
+ ==============================================
+ Vcc ---------> 5V -------------------> Vu (5V)
+ GND ---------> GND ------------------> GND
+ SCL ---------> Pin A5 ---------------> D1
+ SDA ---------> Pin A4 ---------------> D2
+
+ This file is part of OpenMQTTGateway.
+
+ OpenMQTTGateway is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenMQTTGateway is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+*/
+#ifndef config_HTU21_h
+#define config_HTU21_h
+
+extern void setupHTU21();
+extern void HTU21toMQTT();
+
+#define htu21_always true // if false when the current value of the parameter is the same as previous one don't send it by MQTT
+#define TimeBetweenReadinghtu21 30000
+
+/*----------------------------USER PARAMETERS-----------------------------*/
+/*-------------DEFINE YOUR MQTT PARAMETERS BELOW----------------*/
+#define HTUTOPIC "/CLIMAtoMQTT/htu"
+
+#if defined(ESP32)
+ #define I2C_SDA 16
+ #define I2C_SCL 0
+#endif
+
+#endif
\ No newline at end of file
diff --git a/main/main.ino b/main/main.ino
index 5371a2d..a6ed5f5 100644
--- a/main/main.ino
+++ b/main/main.ino
@@ -85,6 +85,9 @@ unsigned long ReceivedSignal[array_size][2] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}};
#ifdef ZsensorBME280
#include "config_BME280.h"
#endif
+#ifdef ZsensorHTU21
+#include "config_HTU21.h"
+#endif
#ifdef ZsensorHCSR04
#include "config_HCSR04.h"
#endif
@@ -599,6 +602,9 @@ void setup()
#ifdef ZsensorBME280
setupZsensorBME280();
#endif
+ #ifdef ZsensorHTU21
+ setupZsensorHTU21();
+ #endif
#ifdef ZsensorBH1750
setupZsensorBH1750();
#endif
@@ -1157,6 +1163,9 @@ void loop()
#ifdef ZsensorBME280
MeasureTempHumAndPressure(); //Addon to measure Temperature, Humidity, Pressure and Altitude with a Bosch BME280
#endif
+ #ifdef ZsensorHTU21
+ MeasureTempHum(); //Addon to measure Temperature, Humidity, of a HTU21 sensor
+ #endif
#ifdef ZsensorHCSR04
MeasureDistance(); //Addon to measure distance with a HC-SR04
#endif
@@ -1286,6 +1295,9 @@ void stateMeasures()
#ifdef ZsensorBME280
modules = modules + ZsensorBME280;
#endif
+ #ifdef ZsensorHTU21
+ modules = modules + ZsensorHTU21;
+ #endif
#ifdef ZsensorHCSR04
modules = modules + ZsensorHCSR04;
#endif
diff --git a/platformio.ini b/platformio.ini
index bdbe8ae..821a602 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -80,6 +80,7 @@ unifiedsensor = Adafruit Unified Sensor@1.0.2
tsl2561 = Adafruit TSL2561@1.0.3
bme280 = SparkFun BME280@2.0.4
bmp180 = BMP180@efac46bd8d
+htu21 = SparkFun HTU21D Humidity and Temperature Sensor Br@1.1.3
ina226 = jarzebski/Arduino-INA226#968a684
a6lib = 1technophile/A6lib
wifimanager = tzapu/WiFiManager#c3ff582
@@ -173,6 +174,7 @@ lib_deps =
${libraries.newremoteswitch}
${libraries.bme280}
${libraries.bmp180}
+ ${libraries.htu21}
${libraries.unifiedsensor}
${libraries.dht}
${libraries.tsl2561}
@@ -194,6 +196,7 @@ build_flags =
'-DZsensorADC="ADC"'
'-DZsensorBH1750="BH1750"'
'-DZsensorBME280="BME280"'
+ '-DZsensorHTU21="HTU21"'
'-DZsensorTSL2561="TSL2561"'
'-DZsensorDHT="DHT"'
'-DZsensorDS1820="DS1820"'
@@ -361,6 +364,7 @@ lib_deps =
${libraries.newremoteswitch}
${libraries.bme280}
${libraries.bmp180}
+ ${libraries.htu21}
${libraries.unifiedsensor}
${libraries.dht}
${libraries.tsl2561}
@@ -386,6 +390,7 @@ build_flags =
'-DZsensorADC="ADC"'
'-DZsensorBH1750="BH1750"'
'-DZsensorBME280="BME280"'
+ '-DZsensorHTU21="HTU21"'
'-DZsensorTSL2561="TSL2561"'
'-DZsensorDHT="DHT"'
'-DZsensorDS1820="DS1820"'
@@ -576,6 +581,7 @@ lib_deps =
${libraries.newremoteswitch}
${libraries.bme280}
${libraries.bmp180}
+ ${libraries.htu21}
${libraries.unifiedsensor}
${libraries.dht}
${libraries.tsl2561}
@@ -598,6 +604,7 @@ build_flags =
'-DZsensorADC="ADC"'
'-DZsensorBH1750="BH1750"'
'-DZsensorBME280="BME280"'
+ '-DZsensorHTU21="HTU21"'
'-DZsensorTSL2561="TSL2561"'
'-DZsensorDHT="DHT"'
'-DZsensorDS1820="DS1820"'