diff --git a/sonoff/_releasenotes.ino b/sonoff/_releasenotes.ino
index bfb2b08c2..b0e96480c 100644
--- a/sonoff/_releasenotes.ino
+++ b/sonoff/_releasenotes.ino
@@ -11,6 +11,7 @@
  * Add rule state test for On/Off in addition to 0/1 (#2613)
  * Add hardware serial option to MHZ-19 sensor (#2659)
  * Add Eastron SDM120 energy meter (#2694)
+ * Add support for sensor SI1145 UV Index / IR / Visible light (#2496)
  * Updated Italian language file (#2618)
  * Update TasmotaSerial to 2.0.0 allowing Hardware Serial Fallback when correct connections are configured
  * Optimize command handling
diff --git a/sonoff/i18n.h b/sonoff/i18n.h
index 5e34007f3..ea626017c 100644
--- a/sonoff/i18n.h
+++ b/sonoff/i18n.h
@@ -73,6 +73,7 @@
 #define D_JSON_I2CSCAN_NO_DEVICES_FOUND "No devices found"
 #define D_JSON_ID "Id"
 #define D_JSON_ILLUMINANCE "Illuminance"
+#define D_JSON_INFRARED "Infrared"
 #define D_JSON_UNKNOWN "Unknown"
 #define D_JSON_LIGHT "Light"
 #define D_JSON_LOCAL_TIME "Local"
@@ -121,6 +122,7 @@
 #define D_JSON_TYPE "Type"
 #define D_JSON_UPTIME "Uptime"
 #define D_JSON_UTC_TIME "UTC"
+#define D_JSON_UVINDEX "UvIndex"
 #define D_JSON_UV_LEVEL "UvLevel"
 #define D_JSON_VCC "Vcc"
 #define D_JSON_VERSION "Version"
diff --git a/sonoff/language/bg-BG.h b/sonoff/language/bg-BG.h
index b3aa97528..dfaebe802 100644
--- a/sonoff/language/bg-BG.h
+++ b/sonoff/language/bg-BG.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "моментален"      // Button immediate
 #define D_INDEX "Индекс"
 #define D_INFO "Информация"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Инициализирано"
 #define D_IP_ADDRESS "IP адрес"
 #define D_LIGHT "Светлина"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Време от стартирането"
 #define D_USER "Потребител"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "Ниво на ултравиолетово излъчване"
 #define D_VERSION "Версия"
 #define D_VOLTAGE "Напрежение"
diff --git a/sonoff/language/cs-CZ.h b/sonoff/language/cs-CZ.h
index 6c07717c9..49239eef8 100644
--- a/sonoff/language/cs-CZ.h
+++ b/sonoff/language/cs-CZ.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "Okamžité"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Informace"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inicializovaný"
 #define D_IP_ADDRESS "Adresa IP"
 #define D_LIGHT "Světlo"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "Uživatel"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "úroveň UV"
 #define D_VERSION "Verze"
 #define D_VOLTAGE "Napětí"
diff --git a/sonoff/language/de-DE.h b/sonoff/language/de-DE.h
index d2808dd9c..0201e00ed 100644
--- a/sonoff/language/de-DE.h
+++ b/sonoff/language/de-DE.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "direkt"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Info"
+#define D_INFRARED "Infrarot"
 #define D_INITIALIZED "initialisiert"
 #define D_IP_ADDRESS "IP-Adresse"
 #define D_LIGHT "Licht"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Laufzeit"
 #define D_USER "Benutzer"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV-Index"
 #define D_UV_LEVEL "UV-Level"
 #define D_VERSION "Version"
 #define D_VOLTAGE "Spannung"
diff --git a/sonoff/language/el-GR.h b/sonoff/language/el-GR.h
index 595281610..c479b3586 100644
--- a/sonoff/language/el-GR.h
+++ b/sonoff/language/el-GR.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "Φωτεινότητα"      // Button immediate
 #define D_INDEX "Κατάλογος"
 #define D_INFO "Πληροφορίες"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Αρχικό"
 #define D_IP_ADDRESS "IP Address"
 #define D_LIGHT "Light"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "Χρήστης"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "Επίπεδο UV"
 #define D_VERSION "Έκδοση"
 #define D_VOLTAGE "Τάση"
diff --git a/sonoff/language/en-GB.h b/sonoff/language/en-GB.h
index 32ca90460..b841f02d5 100644
--- a/sonoff/language/en-GB.h
+++ b/sonoff/language/en-GB.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "immediate"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Info"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Initialized"
 #define D_IP_ADDRESS "IP Address"
 #define D_LIGHT "Light"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "User"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "UV Level"
 #define D_VERSION "Version"
 #define D_VOLTAGE "Voltage"
diff --git a/sonoff/language/es-AR.h b/sonoff/language/es-AR.h
index e77f8ebc8..64f8fd677 100644
--- a/sonoff/language/es-AR.h
+++ b/sonoff/language/es-AR.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "inmediato"      // Button immediate
 #define D_INDEX "Índice"
 #define D_INFO "Información"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inicializado"
 #define D_IP_ADDRESS "Dirección IP"
 #define D_LIGHT "Luz"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Tiempo Encendido"
 #define D_USER "Usuario"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "Índice UV"
 #define D_UV_LEVEL "Nivel UV"
 #define D_VERSION "Versión"
 #define D_VOLTAGE "Tensión"
diff --git a/sonoff/language/fr-FR.h b/sonoff/language/fr-FR.h
index b13e22418..cae6908ae 100644
--- a/sonoff/language/fr-FR.h
+++ b/sonoff/language/fr-FR.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "immédiat"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Info"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Initialisé"
 #define D_IP_ADDRESS "Adresse IP"
 #define D_LIGHT "Lumière"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Durée d'activité"
 #define D_USER "Utilisateur"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "Index UV"
 #define D_UV_LEVEL "Niveau UV"
 #define D_VERSION "Version"
 #define D_VOLTAGE "Tension"
diff --git a/sonoff/language/hu-HU.h b/sonoff/language/hu-HU.h
index 0a5c9a79c..773ff3d2e 100644
--- a/sonoff/language/hu-HU.h
+++ b/sonoff/language/hu-HU.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "azonnali"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Info"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inicializálva"
 #define D_IP_ADDRESS "IP Cím"
 #define D_LIGHT "Fény"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Üzemidő"
 #define D_USER "Felhasználó"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "UV Szint"
 #define D_VERSION "Verzió"
 #define D_VOLTAGE "Feszültség"
diff --git a/sonoff/language/it-IT.h b/sonoff/language/it-IT.h
index 85f91a0a2..2096fe8c3 100644
--- a/sonoff/language/it-IT.h
+++ b/sonoff/language/it-IT.h
@@ -28,7 +28,7 @@
  * Use online command StateText to translate ON, OFF, HOLD and TOGGLE.
  * Use online command Prefix to translate cmnd, stat and tele.
  *
- * Updated until v5.13.0
+ * Updated until v5.13.1a
 \*********************************************************************/
 
 #define LANGUAGE_MODULE_NAME         // Enable to display "Module Generic" (ie Spanish), Disable to display "Generic Module" (ie English)
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "immediato"      // Button immediate
 #define D_INDEX "Indice"
 #define D_INFO "Info"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inizializzato"
 #define D_IP_ADDRESS "Indirizzo IP"
 #define D_LIGHT "Luce"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "Utente"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "Indice UV"
 #define D_UV_LEVEL "Livello UV"
 #define D_VERSION "Versione"
 #define D_VOLTAGE "Tensione"
diff --git a/sonoff/language/nl-NL.h b/sonoff/language/nl-NL.h
index 081a957e3..dec9a11de 100644
--- a/sonoff/language/nl-NL.h
+++ b/sonoff/language/nl-NL.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "onmiddelijk"      // Button immediate
 #define D_INDEX "Index"
 #define D_INFO "Info"
+#define D_INFRARED "Infrarood"
 #define D_INITIALIZED "Geinitialiseerd"
 #define D_IP_ADDRESS "IP Adres"
 #define D_LIGHT "Licht"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Bedrijfstijd"
 #define D_USER "Gebruiker"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV-index"
 #define D_UV_LEVEL "UV niveau"
 #define D_VERSION "Versie"
 #define D_VOLTAGE "Spanning"
diff --git a/sonoff/language/pl-PL.h b/sonoff/language/pl-PL.h
index 6446cc0a4..5d30ffd7f 100644
--- a/sonoff/language/pl-PL.h
+++ b/sonoff/language/pl-PL.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "Natychmiastowe"      // Button immediate
 #define D_INDEX "Indeks"
 #define D_INFO "Informacja"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Zainicjowany"
 #define D_IP_ADDRESS "Adres IP"
 #define D_LIGHT "Światło"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "Użytkownik"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "Poziom UV"
 #define D_VERSION "Wersja"
 #define D_VOLTAGE "Napięcie"
diff --git a/sonoff/language/pt-BR.h b/sonoff/language/pt-BR.h
index 83f53a165..c29cf9bd9 100644
--- a/sonoff/language/pt-BR.h
+++ b/sonoff/language/pt-BR.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "Imediato"      // Button immediate
 #define D_INDEX "Índice"
 #define D_INFO "Informação"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inicializado"
 #define D_IP_ADDRESS "Endereço IP"
 #define D_LIGHT "Luz"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Tempo de atividade"
 #define D_USER "Usuário"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "Índice UV"
 #define D_UV_LEVEL "Nível UV"
 #define D_VERSION "Versão"
 #define D_VOLTAGE "Voltagem"
diff --git a/sonoff/language/pt-PT.h b/sonoff/language/pt-PT.h
index 9765830bd..4605975c3 100644
--- a/sonoff/language/pt-PT.h
+++ b/sonoff/language/pt-PT.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "Immediato"      // Button immediate
 #define D_INDEX "Indíce"
 #define D_INFO "Info"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Inicializado"
 #define D_IP_ADDRESS "Endereço IP"
 #define D_LIGHT "Luz"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Tempo de Atividade"
 #define D_USER "Utilizador"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "Indíce UV"
 #define D_UV_LEVEL "Nível UV"
 #define D_VERSION "Versão"
 #define D_VOLTAGE "Voltagem"
diff --git a/sonoff/language/ru-RU.h b/sonoff/language/ru-RU.h
index c19eccbf1..0de9d88cc 100644
--- a/sonoff/language/ru-RU.h
+++ b/sonoff/language/ru-RU.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "немедленно"      // Button immediate
 #define D_INDEX "Индекс"
 #define D_INFO "Инфо"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "Инициализировано"
 #define D_IP_ADDRESS "IP Адрес"
 #define D_LIGHT "Свет"
@@ -155,6 +156,7 @@
 #define D_UPTIME "Uptime"
 #define D_USER "Пользователь"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "УФ уровень"
 #define D_VERSION "Версия"
 #define D_VOLTAGE "Напряжение"
diff --git a/sonoff/language/zh-CN.h b/sonoff/language/zh-CN.h
index c10cbdc16..fce4fe3e7 100644
--- a/sonoff/language/zh-CN.h
+++ b/sonoff/language/zh-CN.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "immediate"      // Button immediate
 #define D_INDEX "索引:"
 #define D_INFO "信息"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "初始化完成"
 #define D_IP_ADDRESS "IP地址"
 #define D_LIGHT "灯"
@@ -155,6 +156,7 @@
 #define D_UPTIME "运行时间"
 #define D_USER "用户名"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "紫外线水平"
 #define D_VERSION "版本"
 #define D_VOLTAGE "电压"
diff --git a/sonoff/language/zh-TW.h b/sonoff/language/zh-TW.h
index e2c5b9193..f17caf10e 100644
--- a/sonoff/language/zh-TW.h
+++ b/sonoff/language/zh-TW.h
@@ -102,6 +102,7 @@
 #define D_IMMEDIATE "immediate"      // Button immediate
 #define D_INDEX "索引:"
 #define D_INFO "信息"
+#define D_INFRARED "Infrared"
 #define D_INITIALIZED "初始化完成"
 #define D_IP_ADDRESS "IP地址"
 #define D_LIGHT "燈"
@@ -155,6 +156,7 @@
 #define D_UPTIME "運行時間"
 #define D_USER "用戶名"
 #define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
 #define D_UV_LEVEL "紫外線等級"
 #define D_VERSION "版本"
 #define D_VOLTAGE "電壓"
diff --git a/sonoff/user_config.h b/sonoff/user_config.h
index 0d3409933..a8fccd414 100644
--- a/sonoff/user_config.h
+++ b/sonoff/user_config.h
@@ -259,6 +259,7 @@
   #define USE_BH1750                             // Add I2C code for BH1750 sensor (+0k5 code)
 //  #define USE_VEML6070                           // Add I2C code for VEML6070 sensor (+0k5 code)
 //  #define USE_TSL2561                            // Add I2C code for TSL2561 sensor using library Joba_Tsl2561 (+2k3 code)
+  #define USE_SI1145                             // Add I2C code for SI1145/46/47 sensor (+1k code)
 //  #define USE_ADS1115                            // Add I2C code for ADS1115 16 bit A/D converter based on Adafruit ADS1x15 library (no library needed) (+0k7 code)
 //  #define USE_ADS1115_I2CDEV                     // Add I2C code for ADS1115 16 bit A/D converter using library i2cdevlib-Core and i2cdevlib-ADS1115 (+2k code)
 //  #define USE_INA219                             // Add I2C code for INA219 Low voltage and current sensor (+1k code)
diff --git a/sonoff/xsns_16_tsl2561.ino b/sonoff/xsns_16_tsl2561.ino
index 6fe09a88f..63abbc4a1 100644
--- a/sonoff/xsns_16_tsl2561.ino
+++ b/sonoff/xsns_16_tsl2561.ino
@@ -22,9 +22,9 @@
 /*********************************************************************************************\
  * TSL2561 - Light Intensity
  *
- * I2C Addresses: 0x29 (low), 0x39 (float) or 0x49 (high)
- *
  * Using library https://github.com/joba-1/Joba_Tsl2561
+ *
+ * I2C Addresses: 0x29 (low), 0x39 (float) or 0x49 (high)
 \*********************************************************************************************/
 
 #include <Tsl2561Util.h>
@@ -112,5 +112,5 @@ boolean Xsns16(byte function)
   return result;
 }
 
-#endif  // USE_TSL2561_JOBA
+#endif  // USE_TSL2561
 #endif  // USE_I2C
diff --git a/sonoff/xsns_24_si1145.ino b/sonoff/xsns_24_si1145.ino
new file mode 100644
index 000000000..e09f95398
--- /dev/null
+++ b/sonoff/xsns_24_si1145.ino
@@ -0,0 +1,370 @@
+/*
+  xsns_24_si1145.ino - SI1145/46/47 UV Index / IR / Visible light sensor support for Sonoff-Tasmota
+
+  Copyright (C) 2018  Theo Arends
+
+  This program 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.
+
+  This program 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 <http://www.gnu.org/licenses/>.
+*/
+
+#ifdef USE_I2C
+#ifdef USE_SI1145
+/*********************************************************************************************\
+ * SI1145/46/47 - UV Index / IR / Visible light
+ *
+ * Based on library https://github.com/SeeedDocument/Grove-Sunlight_Sensor/
+ *
+ * I2C Addresses: 0x60
+\*********************************************************************************************/
+
+uint8_t si1145_type = 0;
+
+/********************************************************************************************/
+
+#define SI114X_ADDR                         0X60
+//
+//commands
+//
+#define SI114X_QUERY                        0X80
+#define SI114X_SET                          0XA0
+#define SI114X_NOP                          0X00
+#define SI114X_RESET                        0X01
+#define SI114X_BUSADDR                      0X02
+#define SI114X_PS_FORCE                     0X05
+#define SI114X_GET_CAL                      0X12
+#define SI114X_ALS_FORCE                    0X06
+#define SI114X_PSALS_FORCE                  0X07
+#define SI114X_PS_PAUSE                     0X09
+#define SI114X_ALS_PAUSE                    0X0A
+#define SI114X_PSALS_PAUSE                  0X0B
+#define SI114X_PS_AUTO                      0X0D
+#define SI114X_ALS_AUTO                     0X0E
+#define SI114X_PSALS_AUTO                   0X0F
+//
+//IIC REGISTERS
+//
+#define SI114X_PART_ID                      0X00
+#define SI114X_REV_ID                       0X01
+#define SI114X_SEQ_ID                       0X02
+#define SI114X_INT_CFG                      0X03
+#define SI114X_IRQ_ENABLE                   0X04
+#define SI114X_IRQ_MODE1                    0x05
+#define SI114X_IRQ_MODE2                    0x06
+#define SI114X_HW_KEY                       0X07
+#define SI114X_MEAS_RATE0                   0X08
+#define SI114X_MEAS_RATE1                   0X09
+#define SI114X_PS_RATE                      0X0A
+#define SI114X_PS_LED21                     0X0F
+#define SI114X_PS_LED3                      0X10
+#define SI114X_UCOEFF0                      0X13
+#define SI114X_UCOEFF1                      0X14
+#define SI114X_UCOEFF2                      0X15
+#define SI114X_UCOEFF3                      0X16
+#define SI114X_WR                           0X17
+#define SI114X_COMMAND                      0X18
+#define SI114X_RESPONSE                     0X20
+#define SI114X_IRQ_STATUS                   0X21
+#define SI114X_ALS_VIS_DATA0                0X22
+#define SI114X_ALS_VIS_DATA1                0X23
+#define SI114X_ALS_IR_DATA0                 0X24
+#define SI114X_ALS_IR_DATA1                 0X25
+#define SI114X_PS1_DATA0                    0X26
+#define SI114X_PS1_DATA1                    0X27
+#define SI114X_PS2_DATA0                    0X28
+#define SI114X_PS2_DATA1                    0X29
+#define SI114X_PS3_DATA0                    0X2A
+#define SI114X_PS3_DATA1                    0X2B
+#define SI114X_AUX_DATA0_UVINDEX0           0X2C
+#define SI114X_AUX_DATA1_UVINDEX1           0X2D
+#define SI114X_RD                           0X2E
+#define SI114X_CHIP_STAT                    0X30
+//
+//Parameters
+//
+#define SI114X_CHLIST                       0X01
+#define SI114X_CHLIST_ENUV                  0x80
+#define SI114X_CHLIST_ENAUX                 0x40
+#define SI114X_CHLIST_ENALSIR               0x20
+#define SI114X_CHLIST_ENALSVIS              0x10
+#define SI114X_CHLIST_ENPS1                 0x01
+#define SI114X_CHLIST_ENPS2                 0x02
+#define SI114X_CHLIST_ENPS3                 0x04
+
+#define SI114X_PSLED12_SELECT               0X02
+#define SI114X_PSLED3_SELECT                0X03
+
+#define SI114X_PS_ENCODE                    0X05
+#define SI114X_ALS_ENCODE                   0X06
+
+#define SI114X_PS1_ADCMUX                   0X07
+#define SI114X_PS2_ADCMUX                   0X08
+#define SI114X_PS3_ADCMUX                   0X09
+
+#define SI114X_PS_ADC_COUNTER               0X0A
+#define SI114X_PS_ADC_GAIN                  0X0B
+#define SI114X_PS_ADC_MISC                  0X0C
+
+#define SI114X_ALS_IR_ADC_MUX               0X0E
+#define SI114X_AUX_ADC_MUX                  0X0F
+
+#define SI114X_ALS_VIS_ADC_COUNTER          0X10
+#define SI114X_ALS_VIS_ADC_GAIN             0X11
+#define SI114X_ALS_VIS_ADC_MISC             0X12
+
+#define SI114X_LED_REC                      0X1C
+
+#define SI114X_ALS_IR_ADC_COUNTER           0X1D
+#define SI114X_ALS_IR_ADC_GAIN              0X1E
+#define SI114X_ALS_IR_ADC_MISC              0X1F
+//
+//USER SETTINGS DEFINE
+//
+//ADCMUX
+#define SI114X_ADCMUX_SMALL_IR              0x00
+#define SI114X_ADCMUX_VISIABLE              0x02
+#define SI114X_ADCMUX_LARGE_IR              0x03
+#define SI114X_ADCMUX_NO                    0x06
+#define SI114X_ADCMUX_GND                   0x25
+#define SI114X_ADCMUX_TEMPERATURE           0x65
+#define SI114X_ADCMUX_VDD                   0x75
+//LED SEL
+#define SI114X_PSLED12_SELECT_PS1_NONE      0x00
+#define SI114X_PSLED12_SELECT_PS1_LED1      0x01
+#define SI114X_PSLED12_SELECT_PS1_LED2      0x02
+#define SI114X_PSLED12_SELECT_PS1_LED3      0x04
+#define SI114X_PSLED12_SELECT_PS2_NONE      0x00
+#define SI114X_PSLED12_SELECT_PS2_LED1      0x10
+#define SI114X_PSLED12_SELECT_PS2_LED2      0x20
+#define SI114X_PSLED12_SELECT_PS2_LED3      0x40
+#define SI114X_PSLED3_SELECT_PS2_NONE       0x00
+#define SI114X_PSLED3_SELECT_PS2_LED1       0x10
+#define SI114X_PSLED3_SELECT_PS2_LED2       0x20
+#define SI114X_PSLED3_SELECT_PS2_LED3       0x40
+//ADC GAIN DIV
+#define SI114X_ADC_GAIN_DIV1                0X00
+#define SI114X_ADC_GAIN_DIV2                0X01
+#define SI114X_ADC_GAIN_DIV4                0X02
+#define SI114X_ADC_GAIN_DIV8                0X03
+#define SI114X_ADC_GAIN_DIV16               0X04
+#define SI114X_ADC_GAIN_DIV32               0X05
+//LED CURRENT
+#define SI114X_LED_CURRENT_5MA              0X01
+#define SI114X_LED_CURRENT_11MA             0X02
+#define SI114X_LED_CURRENT_22MA             0X03
+#define SI114X_LED_CURRENT_45MA             0X04
+//Recovery period the  ADC takes before making a PS measurement
+#define SI114X_ADC_COUNTER_1ADCCLK          0X00
+#define SI114X_ADC_COUNTER_7ADCCLK          0X01
+#define SI114X_ADC_COUNTER_15ADCCLK         0X02
+#define SI114X_ADC_COUNTER_31ADCCLK         0X03
+#define SI114X_ADC_COUNTER_63ADCCLK         0X04
+#define SI114X_ADC_COUNTER_127ADCCLK        0X05
+#define SI114X_ADC_COUNTER_255ADCCLK        0X06
+#define SI114X_ADC_COUNTER_511ADCCLK        0X07
+//ADC MISC
+#define SI114X_ADC_MISC_LOWRANGE            0X00
+#define SI114X_ADC_MISC_HIGHRANGE           0X20
+#define SI114X_ADC_MISC_ADC_NORMALPROXIMITY 0X00
+#define SI114X_ADC_MISC_ADC_RAWADC          0X04
+//INT OE
+#define SI114X_INT_CFG_INTOE                0X01
+//IRQ ENABLE
+#define SI114X_IRQEN_ALS                    0x01
+#define SI114X_IRQEN_PS1                    0x04
+#define SI114X_IRQEN_PS2                    0x08
+#define SI114X_IRQEN_PS3                    0x10
+
+/********************************************************************************************/
+
+uint8_t Si1145ReadByte(uint8_t reg)
+{
+  return I2cRead8(SI114X_ADDR, reg);
+}
+
+uint16_t Si1145ReadHalfWord(uint8_t reg)
+{
+  return I2cRead16LE(SI114X_ADDR, reg);
+}
+
+bool Si1145WriteByte(uint8_t reg, uint16_t val)
+{
+  I2cWrite8(SI114X_ADDR, reg, val);
+}
+
+uint8_t Si1145WriteParamData(uint8_t p, uint8_t v)
+{
+  Si1145WriteByte(SI114X_WR, v);
+  Si1145WriteByte(SI114X_COMMAND, p | SI114X_SET);
+  return Si1145ReadByte(SI114X_RD);
+}
+
+/********************************************************************************************/
+
+void Si1145Reset()
+{
+  Si1145WriteByte(SI114X_MEAS_RATE0, 0);
+  Si1145WriteByte(SI114X_MEAS_RATE1, 0);
+  Si1145WriteByte(SI114X_IRQ_ENABLE, 0);
+  Si1145WriteByte(SI114X_IRQ_MODE1, 0);
+  Si1145WriteByte(SI114X_IRQ_MODE2, 0);
+  Si1145WriteByte(SI114X_INT_CFG, 0);
+  Si1145WriteByte(SI114X_IRQ_STATUS, 0xFF);
+
+  Si1145WriteByte(SI114X_COMMAND, SI114X_RESET);
+  delay(10);
+  Si1145WriteByte(SI114X_HW_KEY, 0x17);
+  delay(10);
+}
+
+void Si1145DeInit()
+{
+  //ENABLE UV reading
+  //these reg must be set to the fixed value
+  Si1145WriteByte(SI114X_UCOEFF0, 0x29);
+  Si1145WriteByte(SI114X_UCOEFF1, 0x89);
+  Si1145WriteByte(SI114X_UCOEFF2, 0x02);
+  Si1145WriteByte(SI114X_UCOEFF3, 0x00);
+  Si1145WriteParamData(SI114X_CHLIST, SI114X_CHLIST_ENUV |SI114X_CHLIST_ENALSIR | SI114X_CHLIST_ENALSVIS |SI114X_CHLIST_ENPS1);
+  //
+  //set LED1 CURRENT(22.4mA)(It is a normal value for many LED)
+  //
+  Si1145WriteParamData(SI114X_PS1_ADCMUX, SI114X_ADCMUX_LARGE_IR);
+  Si1145WriteByte(SI114X_PS_LED21, SI114X_LED_CURRENT_22MA);
+  Si1145WriteParamData(SI114X_PSLED12_SELECT, SI114X_PSLED12_SELECT_PS1_LED1); //
+  //
+  //PS ADC SETTING
+  //
+  Si1145WriteParamData(SI114X_PS_ADC_GAIN, SI114X_ADC_GAIN_DIV1);
+  Si1145WriteParamData(SI114X_PS_ADC_COUNTER, SI114X_ADC_COUNTER_511ADCCLK);
+  Si1145WriteParamData(SI114X_PS_ADC_MISC, SI114X_ADC_MISC_HIGHRANGE|SI114X_ADC_MISC_ADC_RAWADC);
+  //
+  //VIS ADC SETTING
+  //
+  Si1145WriteParamData(SI114X_ALS_VIS_ADC_GAIN, SI114X_ADC_GAIN_DIV1);
+  Si1145WriteParamData(SI114X_ALS_VIS_ADC_COUNTER, SI114X_ADC_COUNTER_511ADCCLK);
+  Si1145WriteParamData(SI114X_ALS_VIS_ADC_MISC, SI114X_ADC_MISC_HIGHRANGE);
+  //
+  //IR ADC SETTING
+  //
+  Si1145WriteParamData(SI114X_ALS_IR_ADC_GAIN, SI114X_ADC_GAIN_DIV1);
+  Si1145WriteParamData(SI114X_ALS_IR_ADC_COUNTER, SI114X_ADC_COUNTER_511ADCCLK);
+  Si1145WriteParamData(SI114X_ALS_IR_ADC_MISC, SI114X_ADC_MISC_HIGHRANGE);
+  //
+  //interrupt enable
+  //
+  Si1145WriteByte(SI114X_INT_CFG, SI114X_INT_CFG_INTOE);
+  Si1145WriteByte(SI114X_IRQ_ENABLE, SI114X_IRQEN_ALS);
+  //
+  //AUTO RUN
+  //
+  Si1145WriteByte(SI114X_MEAS_RATE0, 0xFF);
+  Si1145WriteByte(SI114X_COMMAND, SI114X_PSALS_AUTO);
+}
+
+boolean Si1145Begin()
+{
+  if (Si1145ReadByte(SI114X_PART_ID) != 0X45) { return false; }
+
+  Si1145Reset();
+  Si1145DeInit();
+  return true;
+}
+
+// returns the UV index * 100 (divide by 100 to get the index)
+uint16_t Si1145ReadUV()
+{
+  return Si1145ReadHalfWord(SI114X_AUX_DATA0_UVINDEX0);
+}
+
+// returns visible+IR light levels
+uint16_t Si1145ReadVisible()
+{
+  return Si1145ReadHalfWord(SI114X_ALS_VIS_DATA0);
+}
+
+// returns IR light levels
+uint16_t Si1145ReadIR()
+{
+  return Si1145ReadHalfWord(SI114X_ALS_IR_DATA0);
+}
+
+/********************************************************************************************/
+
+void Si1145Update()
+{
+  if (!si1145_type) {
+    if (Si1145Begin()) {
+      si1145_type = 1;
+      snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, "SI1145", SI114X_ADDR);
+      AddLog(LOG_LEVEL_DEBUG);
+    }
+  }
+}
+
+#ifdef USE_WEBSERVER
+const char HTTP_SNS_SI1145[] PROGMEM = "%s"
+  "{s}SI1145 " D_ILLUMINANCE "{m}%d " D_UNIT_LUX "{e}"     // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
+  "{s}SI1145 " D_INFRARED "{m}%d " D_UNIT_LUX "{e}"
+  "{s}SI1145 " D_UV_INDEX "{m}%d.%d{e}";
+#endif  // USE_WEBSERVER
+
+void Si1145Show(boolean json)
+{
+  if (si1145_type) {
+    uint16_t visible = Si1145ReadVisible();
+    uint16_t infrared = Si1145ReadIR();
+    uint16_t uvindex = Si1145ReadUV();
+    if (json) {
+      snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"SI1145\":{\"" D_JSON_ILLUMINANCE "\":%d,\"" D_JSON_INFRARED "\":%d,\"" D_JSON_UVINDEX "\":%d.%d}"),
+        mqtt_data, visible, infrared, uvindex /100, uvindex %100);
+#ifdef USE_DOMOTICZ
+      if (0 == tele_period) DomoticzSensor(DZ_ILLUMINANCE, visible);
+#endif  // USE_DOMOTICZ
+    } else {
+#ifdef USE_WEBSERVER
+      snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_SI1145, mqtt_data, visible, infrared, uvindex /100, uvindex %100);
+#endif
+    }
+  }
+}
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+#define XSNS_24
+
+boolean Xsns24(byte function)
+{
+  boolean result = false;
+
+  if (i2c_flg) {
+    switch (function) {
+      case FUNC_EVERY_SECOND:
+        Si1145Update();
+        break;
+      case FUNC_JSON_APPEND:
+        Si1145Show(1);
+        break;
+#ifdef USE_WEBSERVER
+      case FUNC_WEB_APPEND:
+        Si1145Show(0);
+        break;
+#endif  // USE_WEBSERVER
+    }
+  }
+  return result;
+}
+
+#endif  // USE_SI1145
+#endif  // USE_I2C