diff --git a/tasmota/include/tasmota_types.h b/tasmota/include/tasmota_types.h
index b533a069d..f1a021fa2 100644
--- a/tasmota/include/tasmota_types.h
+++ b/tasmota/include/tasmota_types.h
@@ -189,7 +189,7 @@ typedef union {                            // Restricted by MISRA-C Rule 18.4 bu
     uint32_t berry_no_autoexec : 1;        // bit 7  (v12.5.0.3) - SetOption153 - (Berry) Disable autoexec.be on restart (1)
     uint32_t berry_light_scheme : 1;       // bit 8  (v12.5.0.3) - SetOption154 - (Berry) Handle berry led using RMT0 as additional WS2812 scheme
     uint32_t zcfallingedge : 1;            // bit 9  (v13.0.0.1) - SetOption155 - (ZCDimmer) Enable rare falling Edge dimmer instead of leading edge
-    uint32_t spare10 : 1;                  // bit 10
+    uint32_t sen5x_passive_mode : 1;       // bit 10 (v13.1.0.1) - SetOption156 - (Sen5x) Run in passive mode when there is another I2C master (e.g. Ike* Vindstyrka), i.e. do not set up Sen5x sensor, higher polling interval
     uint32_t spare11 : 1;                  // bit 11
     uint32_t spare12 : 1;                  // bit 12
     uint32_t spare13 : 1;                  // bit 13
diff --git a/tasmota/tasmota_xsns_sensor/xsns_103_sen5x.ino b/tasmota/tasmota_xsns_sensor/xsns_103_sen5x.ino
index 2682ae815..be21ff1e9 100644
--- a/tasmota/tasmota_xsns_sensor/xsns_103_sen5x.ino
+++ b/tasmota/tasmota_xsns_sensor/xsns_103_sen5x.ino
@@ -32,6 +32,7 @@
 #define XI2C_76 76 // See I2CDEVICES.md
 
 #define SEN5X_ADDRESS 0x69
+#define SEN5X_PASSIVE_MODE_INTERVAL 10
 
 #include <SensirionI2CSen5x.h>
 #include <Wire.h>
@@ -83,25 +84,26 @@ void sen5x_Init(void) {
   else {
     sen5x->begin(Wire);
   }
-  int error_stop = sen5x->deviceReset();
-  if (error_stop != 0) {
-    DEBUG_SENSOR_LOG(PSTR("Sensirion SEN5X failed to reset device (I2C Bus %d)"), usingI2cBus);
-    return;
-  }
-  // Wait 1 second for sensors to start recording + 100ms for reset command
-  delay(1100);
-  int error_start = sen5x->startMeasurement();
-  if (error_start != 0) {
-    DEBUG_SENSOR_LOG(PSTR("Sensirion SEN5X failed to start measurement (I2C Bus %d)"), usingI2cBus);
-    return;
+  
+  if (!Settings->flag6.sen5x_passive_mode) {
+    int error_stop = sen5x->deviceReset();
+    if (error_stop != 0) {
+      DEBUG_SENSOR_LOG(PSTR("Sensirion SEN5X failed to reset device (I2C Bus %d)"), usingI2cBus);
+      return;
+    }
+    // Wait 1 second for sensors to start recording + 100ms for reset command
+    delay(1100);
+    int error_start = sen5x->startMeasurement();
+    if (error_start != 0) {
+      DEBUG_SENSOR_LOG(PSTR("Sensirion SEN5X failed to start measurement (I2C Bus %d)"), usingI2cBus);
+      return;
+    }
   }
 
   SEN5XDATA = (SEN5XDATA_s *)calloc(1, sizeof(struct SEN5XDATA_s));
   I2cSetActiveFound(SEN5X_ADDRESS, "SEN5X", usingI2cBus);
 }
 
-#define SAVE_PERIOD 30
-
 void SEN5XUpdate(void) {  // Perform every second to ensure proper operation of the baseline compensation algorithm
   uint16_t error;
   char errorMessage[256];
@@ -215,7 +217,14 @@ bool Xsns103(uint32_t function) {
   else if (SEN5XDATA != nullptr) {
     switch (function) {
     case FUNC_EVERY_SECOND:
-      SEN5XUpdate();
+      if (Settings->flag6.sen5x_passive_mode) {
+        if (TasmotaGlobal.uptime % SEN5X_PASSIVE_MODE_INTERVAL == 0) {
+          SEN5XUpdate();
+        }
+      }
+      else {
+        SEN5XUpdate();
+      }
       break;
     case FUNC_JSON_APPEND:
       SEN5XShow(1);