diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6c34906a..336c85abe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ All notable changes to this project will be documented in this file.
 - Berry support for vararg
 - Command ``Subscribe2 ...`` to subscribe to a MQTT topic without appended "/#" (#12858)
 - Support for Hydreon RG-15 Solid State Rain sensor (#12974)
+- Support for IKEA VINDRIKTNING particle concentration sensor (#12976)
 
 ### Changed
 - Shelly EM template needs to use GPIO ADE7953_IRQ_2
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 4af686e81..f87825dd6 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -123,6 +123,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 - Command ``Subscribe2 ...`` to subscribe to a MQTT topic without appended "/#" [#12858](https://github.com/arendst/Tasmota/issues/12858)
 - Support for IEM3155 Wattmeter [#12940](https://github.com/arendst/Tasmota/issues/12940)
 - Support for Hydreon RG-15 Solid State Rain sensor [#12974](https://github.com/arendst/Tasmota/issues/12974)
+- Support for IKEA VINDRIKTNING particle concentration sensor [#12976](https://github.com/arendst/Tasmota/issues/12976)
 
 ### Changed
 - Move firmware binaries to https://github.com/arendst/Tasmota-firmware/tree/main/release-firmware
diff --git a/tasmota/language/af_AF.h b/tasmota/language/af_AF.h
index 18d3fd4b8..766f31d6a 100644
--- a/tasmota/language/af_AF.h
+++ b/tasmota/language/af_AF.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/bg_BG.h b/tasmota/language/bg_BG.h
index 6b256c80c..358390bc9 100644
--- a/tasmota/language/bg_BG.h
+++ b/tasmota/language/bg_BG.h
@@ -837,6 +837,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/cs_CZ.h b/tasmota/language/cs_CZ.h
index c37b21952..be7396a92 100644
--- a/tasmota/language/cs_CZ.h
+++ b/tasmota/language/cs_CZ.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/de_DE.h b/tasmota/language/de_DE.h
index 29ab0818d..fdee2f6c3 100644
--- a/tasmota/language/de_DE.h
+++ b/tasmota/language/de_DE.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/el_GR.h b/tasmota/language/el_GR.h
index e49a964ea..d18aa9bce 100644
--- a/tasmota/language/el_GR.h
+++ b/tasmota/language/el_GR.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/en_GB.h b/tasmota/language/en_GB.h
index ba6b11cd0..2caab6abc 100644
--- a/tasmota/language/en_GB.h
+++ b/tasmota/language/en_GB.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/es_ES.h b/tasmota/language/es_ES.h
index d41a70ac1..c5d98d79e 100644
--- a/tasmota/language/es_ES.h
+++ b/tasmota/language/es_ES.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/fr_FR.h b/tasmota/language/fr_FR.h
index ec04ab26b..bd63fc53f 100644
--- a/tasmota/language/fr_FR.h
+++ b/tasmota/language/fr_FR.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/fy_NL.h b/tasmota/language/fy_NL.h
index 7b2e0b366..86e0fb7d2 100644
--- a/tasmota/language/fy_NL.h
+++ b/tasmota/language/fy_NL.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/he_HE.h b/tasmota/language/he_HE.h
index 68f324a8c..efd02b2f4 100644
--- a/tasmota/language/he_HE.h
+++ b/tasmota/language/he_HE.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/hu_HU.h b/tasmota/language/hu_HU.h
index 7455ee7f6..3da61ccc6 100644
--- a/tasmota/language/hu_HU.h
+++ b/tasmota/language/hu_HU.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/it_IT.h b/tasmota/language/it_IT.h
index 7fe20f02d..2d80dea18 100644
--- a/tasmota/language/it_IT.h
+++ b/tasmota/language/it_IT.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS             "MCP2515 - CS"
 #define D_SENSOR_HRG15_RX               "HRG15 Rx"
 #define D_SENSOR_HRG15_TX               "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX        "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE                     "A"
diff --git a/tasmota/language/ko_KO.h b/tasmota/language/ko_KO.h
index 86f9c0ea3..d427966cd 100644
--- a/tasmota/language/ko_KO.h
+++ b/tasmota/language/ko_KO.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/nl_NL.h b/tasmota/language/nl_NL.h
index 46243e5e7..56015b023 100644
--- a/tasmota/language/nl_NL.h
+++ b/tasmota/language/nl_NL.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pl_PL.h b/tasmota/language/pl_PL.h
index 7d2ccf154..7f9b79727 100644
--- a/tasmota/language/pl_PL.h
+++ b/tasmota/language/pl_PL.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pt_BR.h b/tasmota/language/pt_BR.h
index ed2812cc8..83a9d88c3 100644
--- a/tasmota/language/pt_BR.h
+++ b/tasmota/language/pt_BR.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pt_PT.h b/tasmota/language/pt_PT.h
index 4853fdd0a..831563664 100644
--- a/tasmota/language/pt_PT.h
+++ b/tasmota/language/pt_PT.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/ro_RO.h b/tasmota/language/ro_RO.h
index 88f9a99f9..b1058e60d 100644
--- a/tasmota/language/ro_RO.h
+++ b/tasmota/language/ro_RO.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/ru_RU.h b/tasmota/language/ru_RU.h
index 6642506b1..b6fb1bc35 100644
--- a/tasmota/language/ru_RU.h
+++ b/tasmota/language/ru_RU.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "А"
diff --git a/tasmota/language/sk_SK.h b/tasmota/language/sk_SK.h
index 7cbb51d2f..3ac233b00 100644
--- a/tasmota/language/sk_SK.h
+++ b/tasmota/language/sk_SK.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/sv_SE.h b/tasmota/language/sv_SE.h
index 9de80ed08..c026d53b6 100644
--- a/tasmota/language/sv_SE.h
+++ b/tasmota/language/sv_SE.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/tr_TR.h b/tasmota/language/tr_TR.h
index 6f236ed7f..5d2d969b4 100644
--- a/tasmota/language/tr_TR.h
+++ b/tasmota/language/tr_TR.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/uk_UA.h b/tasmota/language/uk_UA.h
index 68181966b..3be6240c2 100644
--- a/tasmota/language/uk_UA.h
+++ b/tasmota/language/uk_UA.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE                    "А"
diff --git a/tasmota/language/vi_VN.h b/tasmota/language/vi_VN.h
index 11a35daea..d1e855bec 100644
--- a/tasmota/language/vi_VN.h
+++ b/tasmota/language/vi_VN.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/zh_CN.h b/tasmota/language/zh_CN.h
index 3d6475d37..c9a64adac 100644
--- a/tasmota/language/zh_CN.h
+++ b/tasmota/language/zh_CN.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/zh_TW.h b/tasmota/language/zh_TW.h
index 08ac66206..2074f04f7 100644
--- a/tasmota/language/zh_TW.h
+++ b/tasmota/language/zh_TW.h
@@ -838,6 +838,7 @@
 #define D_SENSOR_MCP2515_CS    "MCP2515 CS"
 #define D_SENSOR_HRG15_RX      "HRG15 Rx"
 #define D_SENSOR_HRG15_TX      "HRG15 Tx"
+#define D_SENSOR_VINDRIKTNING_RX "VINDRIKTNING"
 
 // Units
 #define D_UNIT_AMPERE "安培"
diff --git a/tasmota/my_user_config.h b/tasmota/my_user_config.h
index bb6a5a45d..9c85c7549 100644
--- a/tasmota/my_user_config.h
+++ b/tasmota/my_user_config.h
@@ -744,6 +744,7 @@
 //  #define USE_AS608_MESSAGES                     // Add verbose error messages (+0k4 code)
 //#define USE_TFMINIPLUS                           // Add support for TFmini Plus (TFmini, TFmini-S) LiDAR modules via UART interface (+0k8)
 //#define USE_HRG15                                // Add support for Hydreon RG-15 Solid State Rain sensor (+1k5 code)
+//#define USE_VINDRIKTNING                         // Add support for IKEA VINDRIKTNING particle concentration sensor (+1k code)
 
 // -- Power monitoring sensors --------------------
 #define USE_ENERGY_SENSOR                        // Add support for Energy Monitors (+14k code)
diff --git a/tasmota/support_features.ino b/tasmota/support_features.ino
index 68008637c..114809a00 100644
--- a/tasmota/support_features.ino
+++ b/tasmota/support_features.ino
@@ -765,7 +765,9 @@ void ResponseAppendFeatures(void)
 #ifdef USE_HRG15
     feature8 |= 0x00001000;  // xsns_90_hrg15.ino
 #endif
-//    feature8 |= 0x00002000;
+#ifdef USE_VINDRIKTNING
+    feature8 |= 0x00002000;  // xsns_91_vindriktning.ino
+#endif
 //    feature8 |= 0x00004000;
 //    feature8 |= 0x00008000;
 
diff --git a/tasmota/tasmota_template.h b/tasmota/tasmota_template.h
index acede8653..cb8b664af 100644
--- a/tasmota/tasmota_template.h
+++ b/tasmota/tasmota_template.h
@@ -171,6 +171,7 @@ enum UserSelectablePins {
   GPIO_INTERRUPT,
   GPIO_MCP2515_CS,                     // MCP2515 Chip Select
   GPIO_HRG15_TX, GPIO_HRG15_RX,        // Hydreon RG-15 rain sensor serial interface
+  GPIO_VINDRIKTNING_RX,                // IKEA VINDRIKTNING Serial interface
   GPIO_SENSOR_END };
 
 enum ProgramSelectablePins {
@@ -361,7 +362,8 @@ const char kSensorNames[] PROGMEM =
   D_SENSOR_I2S_IN_DATA  "|" D_SENSOR_I2S_IN_CLK  "|" D_SENSOR_I2S_IN_SLCT  "|"
   D_SENSOR_INTERRUPT "|"
   D_SENSOR_MCP2515_CS "|"
-  D_SENSOR_HRG15_TX "|" D_SENSOR_HRG15_RX
+  D_SENSOR_HRG15_TX "|" D_SENSOR_HRG15_RX "|"
+  D_SENSOR_VINDRIKTNING_RX
   ;
 
 const char kSensorNamesFixed[] PROGMEM =
@@ -797,6 +799,9 @@ const uint16_t kGpioNiceList[] PROGMEM = {
   AGPIO(GPIO_HRG15_TX),
   AGPIO(GPIO_HRG15_RX),
 #endif
+#ifdef USE_VINDRIKTNING
+  AGPIO(GPIO_VINDRIKTNING_RX),
+#endif
 
 /*-------------------------------------------------------------------------------------------*\
  * Other sensors
diff --git a/tasmota/xsns_91_vindriktning.ino b/tasmota/xsns_91_vindriktning.ino
new file mode 100644
index 000000000..640eeede9
--- /dev/null
+++ b/tasmota/xsns_91_vindriktning.ino
@@ -0,0 +1,170 @@
+/*
+  xsns_91_vindriktning.ino - IKEA vindriktning particle concentration sensor support for Tasmota
+
+  Copyright (C) 2021  Marcel Ritter and 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_VINDRIKTNING
+/*********************************************************************************************\
+ * IKEA VINDRIKTNING particle concentration sensor
+\*********************************************************************************************/
+
+#define XSNS_91             91
+
+#include <TasmotaSerial.h>
+
+#ifndef MIN_INTERVAL_PERIOD
+#define MIN_INTERVAL_PERIOD 60    // minimum interval period in seconds required for passive mode
+#endif
+
+#define VINDRIKTNING_DATASET_SIZE 20
+
+TasmotaSerial *VindriktningSerial;
+
+struct VINDRIKTNING {
+  uint16_t pm2_5 = 0;
+  uint16_t pm1_0 = 0;
+  uint16_t pm10 = 0;
+  uint8_t type = 1;
+  uint8_t valid = 0;
+  bool discovery_triggered = false;
+} Vindriktning;
+
+bool VindriktningReadData(void) {
+  if (!VindriktningSerial->available()) {
+    return false;
+  }
+
+  int serial_in_byte_counter = 0;
+  uint8_t buffer[VINDRIKTNING_DATASET_SIZE];
+  uint8_t crc = 0;
+
+  while (VindriktningSerial->available()) {
+    uint8_t serial_in_byte = VindriktningSerial->read();
+    if (serial_in_byte_counter <= VINDRIKTNING_DATASET_SIZE -1) {
+      buffer[serial_in_byte_counter++] = serial_in_byte;
+      crc += serial_in_byte;
+    }
+  }
+  VindriktningSerial->flush();  // Make room for another burst
+
+  AddLogBuffer(LOG_LEVEL_DEBUG_MORE, buffer, VINDRIKTNING_DATASET_SIZE);
+
+  if (serial_in_byte_counter < VINDRIKTNING_DATASET_SIZE) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("VDN: Not enough data (%d < 20)"), serial_in_byte_counter);
+    return false;
+  }
+
+  if (crc != 0) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("VDN: " D_CHECKSUM_FAILURE));
+    return false;
+  }
+
+  // sample data:
+  // 16 11 0b 00 00 00 0c 00 00 03 cb 00 00 00 0c 01 00 00 00 e7
+  //               |pm2_5|     |pm1_0|        |pm10 |     | CRC |
+  Vindriktning.pm2_5 = (buffer[5] << 8) | buffer[6];
+  Vindriktning.pm1_0 = (buffer[9] << 8) | buffer[10];
+  Vindriktning.pm10 = (buffer[13] << 8) | buffer[14];
+
+  if (!Vindriktning.discovery_triggered) {
+    TasmotaGlobal.discovery_counter = 1;      // force TasDiscovery()
+    Vindriktning.discovery_triggered = true;
+  }
+  return true;
+}
+
+/*********************************************************************************************/
+
+void VindriktningSecond(void) {                // Every second
+  if (VindriktningReadData()) {
+    Vindriktning.valid = MIN_INTERVAL_PERIOD;
+  } else {
+    if (Vindriktning.valid) {
+      Vindriktning.valid--;
+    }
+  }
+}
+
+/*********************************************************************************************/
+
+void VindriktningInit(void) {
+  Vindriktning.type = 0;
+  if (PinUsed(GPIO_VINDRIKTNING_RX)) {
+    VindriktningSerial = new TasmotaSerial(Pin(GPIO_VINDRIKTNING_RX), -1, 1);
+    if (VindriktningSerial->begin(9600)) {
+      if (VindriktningSerial->hardwareSerial()) { ClaimSerial(); }
+      Vindriktning.type = 1;
+    }
+  }
+}
+
+#ifdef USE_WEBSERVER
+const char HTTP_VINDRIKTNING_SNS[] PROGMEM =
+  "{s}VINDRIKTNING " D_ENVIRONMENTAL_CONCENTRATION " 1.0 " D_UNIT_MICROMETER "{m}%d " D_UNIT_MICROGRAM_PER_CUBIC_METER "{e}"
+  "{s}VINDRIKTNING " D_ENVIRONMENTAL_CONCENTRATION " 2.5 " D_UNIT_MICROMETER "{m}%d " D_UNIT_MICROGRAM_PER_CUBIC_METER "{e}"
+  "{s}VINDRIKTNING " D_ENVIRONMENTAL_CONCENTRATION " 10 " D_UNIT_MICROMETER "{m}%d " D_UNIT_MICROGRAM_PER_CUBIC_METER "{e}";      // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
+#endif  // USE_WEBSERVER
+
+void VindriktningShow(bool json) {
+  if (Vindriktning.valid) {
+    if (json) {
+      ResponseAppend_P(PSTR(",\"VINDRIKTNING\":{\"PM1\":%d,\"PM2.5\":%d,\"PM10\":%d}"),
+        Vindriktning.pm1_0, Vindriktning.pm2_5, Vindriktning.pm10);
+#ifdef USE_DOMOTICZ
+      if (0 == TasmotaGlobal.tele_period) {
+        DomoticzSensor(DZ_COUNT, Vindriktning.pm1_0);	   // PM1.0
+        DomoticzSensor(DZ_VOLTAGE, Vindriktning.pm2_5);	 // PM2.5
+        DomoticzSensor(DZ_CURRENT, Vindriktning.pm10);	 // PM10
+      }
+#endif  // USE_DOMOTICZ
+#ifdef USE_WEBSERVER
+    } else {
+        WSContentSend_PD(HTTP_VINDRIKTNING_SNS, Vindriktning.pm1_0, Vindriktning.pm2_5, Vindriktning.pm10);
+#endif  // USE_WEBSERVER
+    }
+  }
+}
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+bool Xsns91(uint8_t function) {
+  bool result = false;
+
+  if (Vindriktning.type) {
+    switch (function) {
+      case FUNC_EVERY_SECOND:
+        VindriktningSecond();
+        break;
+      case FUNC_JSON_APPEND:
+        VindriktningShow(1);
+        break;
+#ifdef USE_WEBSERVER
+      case FUNC_WEB_SENSOR:
+	      VindriktningShow(0);
+        break;
+#endif  // USE_WEBSERVER
+      case FUNC_INIT:
+        VindriktningInit();
+        break;
+    }
+  }
+  return result;
+}
+
+#endif  // USE_VINDRIKTNING
\ No newline at end of file
diff --git a/tools/decode-status.py b/tools/decode-status.py
index a7c900ed9..ffbbca5b0 100755
--- a/tools/decode-status.py
+++ b/tools/decode-status.py
@@ -256,7 +256,7 @@ a_features = [[
     "USE_MPU_ACCEL","USE_TFMINIPLUS","USE_CSE7761","USE_BERRY",
     "USE_BM8563","USE_ENERGY_DUMMY","USE_AM2320","USE_T67XX",
     "USE_MCP2515","USE_TASMESH","USE_WIFI_RANGE_EXTENDER","USE_INFLUXDB",
-    "USE_HRG15","","","",
+    "USE_HRG15","USE_VINDRIKTNING","","",
     "","","","",
     "","","","",
     "","","","",
@@ -288,7 +288,7 @@ else:
         obj = json.load(fp)
 
 def StartDecode():
-    print ("\n*** decode-status.py v20210825 by Theo Arends and Jacek Ziolkowski ***")
+    print ("\n*** decode-status.py v20210826 by Theo Arends and Jacek Ziolkowski ***")
 
 #    print("Decoding\n{}".format(obj))