diff --git a/CHANGELOG.md b/CHANGELOG.md
index c83671018..ed9ade0a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ All notable changes to this project will be documented in this file.
 - I2C bus2 support to ADS1115 A/D Converter
 - I2C bus2 support to SHTxX temperature and humidity sensor
 - I2C bus2 support to HYTxxx temperature and humidity sensor
+- I2C bus2 support to SI1145/6/7 Ultra violet index and light sensor
 
 ### Breaking Changed
 
diff --git a/I2CDEVICES.md b/I2CDEVICES.md
index a8ced4057..981ae465b 100644
--- a/I2CDEVICES.md
+++ b/I2CDEVICES.md
@@ -37,9 +37,9 @@ Index | Define              | Driver   | Device   | Address(es) | Bus2 | Descrip
   16  | USE_TSL2561         | xsns_16  | TSL2561  | 0x29, 0x39, 0x49 |      | Light intensity sensor
   17  | USE_MGS             | xsns_19  | Grove    | 0x04        |      | Multichannel gas sensor
   18  | USE_SGP30           | xsns_21  | SGP30    | 0x58        |      | Gas (TVOC) and air quality sensor
-  19  | USE_SI1145          | xsns_24  | SI1145   | 0x60        |      | Ultra violet index and light sensor
-  19  | USE_SI1145          | xsns_24  | SI1146   | 0x60        |      | Ultra violet index and light sensor
-  19  | USE_SI1145          | xsns_24  | SI1147   | 0x60        |      | Ultra violet index and light sensor
+  19  | USE_SI1145          | xsns_24  | SI1145   | 0x60        | Yes  | Ultra violet index and light sensor
+  19  | USE_SI1145          | xsns_24  | SI1146   | 0x60        | Yes  | Ultra violet index and light sensor
+  19  | USE_SI1145          | xsns_24  | SI1147   | 0x60        | Yes  | Ultra violet index and light sensor
   20  | USE_LM75AD          | xsns_26  | LM75AD   | 0x48 - 0x4F |      | Temperature sensor
   21  | USE_APDS9960        | xsns_27  | APDS9960 | 0x39        |      | Proximity ambient light RGB and gesture sensor
   22  | USE_MCP230xx        | xsns_29  | MCP23008 | 0x20 - 0x26 |      |  8-bit I/O expander
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 598c91374..979261865 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -119,6 +119,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 - I2C bus2 support to ADS1115 A/D Converter
 - I2C bus2 support to SHTxX temperature and humidity sensor
 - I2C bus2 support to HYTxxx temperature and humidity sensor
+- I2C bus2 support to SI1145/6/7 Ultra violet index and light sensor
 
 ### Breaking Changed
 
diff --git a/tasmota/tasmota_xsns_sensor/xsns_24_si1145.ino b/tasmota/tasmota_xsns_sensor/xsns_24_si1145.ino
index 0f4df82e5..0cdc73a36 100644
--- a/tasmota/tasmota_xsns_sensor/xsns_24_si1145.ino
+++ b/tasmota/tasmota_xsns_sensor/xsns_24_si1145.ino
@@ -188,27 +188,24 @@ uint16_t si1145_infrared;
 uint16_t si1145_uvindex;
 
 bool si1145_type = false;
+uint8_t si1145_bus = 0;
 uint8_t si1145_valid = 0;
 
 /********************************************************************************************/
 
-uint8_t Si1145ReadByte(uint8_t reg)
-{
-  return I2cRead8(SI114X_ADDR, reg);
+uint8_t Si1145ReadByte(uint8_t reg) {
+  return I2cRead8(SI114X_ADDR, reg, si1145_bus);
 }
 
-uint16_t Si1145ReadHalfWord(uint8_t reg)
-{
-  return I2cRead16LE(SI114X_ADDR, reg);
+uint16_t Si1145ReadHalfWord(uint8_t reg) {
+  return I2cRead16LE(SI114X_ADDR, reg, si1145_bus);
 }
 
-void Si1145WriteByte(uint8_t reg, uint16_t val)
-{
-  I2cWrite8(SI114X_ADDR, reg, val);
+void Si1145WriteByte(uint8_t reg, uint16_t val) {
+  I2cWrite8(SI114X_ADDR, reg, val, si1145_bus);
 }
 
-uint8_t Si1145WriteParamData(uint8_t p, uint8_t v)
-{
+uint8_t Si1145WriteParamData(uint8_t p, uint8_t v) {
   Si1145WriteByte(SI114X_WR, v);
   Si1145WriteByte(SI114X_COMMAND, p | SI114X_SET);
   return Si1145ReadByte(SI114X_RD);
@@ -324,13 +321,15 @@ bool Si1145Read(void)
   return true;
 }
 
-void Si1145Detect(void)
-{
-  if (!I2cSetDevice(SI114X_ADDR)) { return; }
+void Si1145Detect(void) {
+  for (si1145_bus = 0; si1145_bus < 2; si1145_bus++) {
+    if (!I2cSetDevice(SI114X_ADDR, si1145_bus)) { continue; }
 
-  if (Si1145Begin()) {
-    si1145_type = true;
-    I2cSetActiveFound(SI114X_ADDR, "SI1145");
+    if (Si1145Begin()) {
+      si1145_type = true;
+      I2cSetActiveFound(SI114X_ADDR, "SI1145", si1145_bus);
+      return;
+    }
   }
 }