diff --git a/CHANGELOG.md b/CHANGELOG.md
index 79e41be9e..743b0fcaa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ All notable changes to this project will be documented in this file.
 - Support for up to 4 I2C SEESAW_SOIL Capacitance & Temperature sensors by Peter Franck (#10481)
 - ESP8266 Support for 2MB and up linker files with 1MB and up LittleFS
 - ESP32 support for TLS MQTT using BearSSL (same as ESP8266)
+- Support for 24/26/32/34 bit RFID Wiegand interface (D0/D1) by Sigurd Leuther (#3647)
 
 ### Breaking Changed
 - ESP32 switch from default SPIFFS to default LittleFS file system loosing current (zigbee) files
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index b3f8e38a0..136d679f3 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -78,6 +78,7 @@ The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota
 - Support for disabling 38kHz IR modulation using ``#define IR_SEND_USE_MODULATION false`` [#10301](https://github.com/arendst/Tasmota/issues/10301)
 - Support for SPI display driver for ST7789 TFT by Gerhard Mutz [#9037](https://github.com/arendst/Tasmota/issues/9037)
 - Support for time proportioned (``#define USE_TIMEPROP``) and optional PID (``#define USE_PID``) relay control [#10412](https://github.com/arendst/Tasmota/issues/10412)
+- Support for 24/26/32/34 bit RFID Wiegand interface (D0/D1) by Sigurd Leuther [#3647](https://github.com/arendst/Tasmota/issues/3647)
 - Support rotary encoder on Shelly Dimmer [#10407](https://github.com/arendst/Tasmota/issues/10407#issuecomment-756240920)
 - Support character `#` to be replaced by `space`-character in command ``Publish`` topic [#10258](https://github.com/arendst/Tasmota/issues/10258)
 - Basic support for ESP32 Odroid Go 16MB binary tasmota32-odroidgo.bin [#8630](https://github.com/arendst/Tasmota/issues/8630)
diff --git a/tasmota/language/af_AF.h b/tasmota/language/af_AF.h
index f6fb4a662..b13396097 100644
--- a/tasmota/language/af_AF.h
+++ b/tasmota/language/af_AF.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/bg_BG.h b/tasmota/language/bg_BG.h
index f00b30d2c..b69e1b81c 100644
--- a/tasmota/language/bg_BG.h
+++ b/tasmota/language/bg_BG.h
@@ -781,6 +781,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/cs_CZ.h b/tasmota/language/cs_CZ.h
index d529a4e16..6ed6b3b63 100644
--- a/tasmota/language/cs_CZ.h
+++ b/tasmota/language/cs_CZ.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/de_DE.h b/tasmota/language/de_DE.h
index 071bfaaa0..635318b54 100644
--- a/tasmota/language/de_DE.h
+++ b/tasmota/language/de_DE.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/el_GR.h b/tasmota/language/el_GR.h
index 9f1342b0b..718ee89d8 100644
--- a/tasmota/language/el_GR.h
+++ b/tasmota/language/el_GR.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/en_GB.h b/tasmota/language/en_GB.h
index 11acc25fb..9d0a73354 100644
--- a/tasmota/language/en_GB.h
+++ b/tasmota/language/en_GB.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/es_ES.h b/tasmota/language/es_ES.h
index bb9bdd4d0..b35de9d0b 100644
--- a/tasmota/language/es_ES.h
+++ b/tasmota/language/es_ES.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/fr_FR.h b/tasmota/language/fr_FR.h
index 709788ecc..5dfc7c5ba 100644
--- a/tasmota/language/fr_FR.h
+++ b/tasmota/language/fr_FR.h
@@ -778,6 +778,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "CarteSD CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/he_HE.h b/tasmota/language/he_HE.h
index 1ed935184..b36412ac1 100644
--- a/tasmota/language/he_HE.h
+++ b/tasmota/language/he_HE.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/hu_HU.h b/tasmota/language/hu_HU.h
index b8d4d5347..62f2131ce 100644
--- a/tasmota/language/hu_HU.h
+++ b/tasmota/language/hu_HU.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/it_IT.h b/tasmota/language/it_IT.h
index 6791d768a..391f166a7 100644
--- a/tasmota/language/it_IT.h
+++ b/tasmota/language/it_IT.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 - CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 - DC"
 #define D_SENSOR_SDCARD_CS     "Scheda SD - CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/ko_KO.h b/tasmota/language/ko_KO.h
index a51333856..7593261df 100644
--- a/tasmota/language/ko_KO.h
+++ b/tasmota/language/ko_KO.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/nl_NL.h b/tasmota/language/nl_NL.h
index 185e3a0c0..0eea3bb75 100644
--- a/tasmota/language/nl_NL.h
+++ b/tasmota/language/nl_NL.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pl_PL.h b/tasmota/language/pl_PL.h
index 9da13e702..2d614d037 100644
--- a/tasmota/language/pl_PL.h
+++ b/tasmota/language/pl_PL.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pt_BR.h b/tasmota/language/pt_BR.h
index f48328e4c..ecb4a8afc 100644
--- a/tasmota/language/pt_BR.h
+++ b/tasmota/language/pt_BR.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/pt_PT.h b/tasmota/language/pt_PT.h
index f7893127c..6f7a11f01 100644
--- a/tasmota/language/pt_PT.h
+++ b/tasmota/language/pt_PT.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/ro_RO.h b/tasmota/language/ro_RO.h
index b4641fca8..270b251d7 100644
--- a/tasmota/language/ro_RO.h
+++ b/tasmota/language/ro_RO.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/ru_RU.h b/tasmota/language/ru_RU.h
index 9d19762a4..e37ed4e8f 100644
--- a/tasmota/language/ru_RU.h
+++ b/tasmota/language/ru_RU.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "А"
diff --git a/tasmota/language/sk_SK.h b/tasmota/language/sk_SK.h
index 5c46b4b89..2eebf1331 100644
--- a/tasmota/language/sk_SK.h
+++ b/tasmota/language/sk_SK.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/sv_SE.h b/tasmota/language/sv_SE.h
index a6e6aa1f6..ed97b84e8 100644
--- a/tasmota/language/sv_SE.h
+++ b/tasmota/language/sv_SE.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/tr_TR.h b/tasmota/language/tr_TR.h
index 21ac79065..659dcf15b 100644
--- a/tasmota/language/tr_TR.h
+++ b/tasmota/language/tr_TR.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/uk_UA.h b/tasmota/language/uk_UA.h
index b32761e2e..a350cef9b 100644
--- a/tasmota/language/uk_UA.h
+++ b/tasmota/language/uk_UA.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE                    "А"
diff --git a/tasmota/language/vi_VN.h b/tasmota/language/vi_VN.h
index e5d7d6c35..86eb6eb2e 100644
--- a/tasmota/language/vi_VN.h
+++ b/tasmota/language/vi_VN.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "A"
diff --git a/tasmota/language/zh_CN.h b/tasmota/language/zh_CN.h
index 2041c1483..d0a29c3c1 100644
--- a/tasmota/language/zh_CN.h
+++ b/tasmota/language/zh_CN.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "安"
diff --git a/tasmota/language/zh_TW.h b/tasmota/language/zh_TW.h
index 46814ce24..02d898d5a 100644
--- a/tasmota/language/zh_TW.h
+++ b/tasmota/language/zh_TW.h
@@ -782,6 +782,8 @@
 #define D_SENSOR_SSD1331_CS    "SSD1331 CS"
 #define D_SENSOR_SSD1331_DC    "SSD1331 DC"
 #define D_SENSOR_SDCARD_CS     "SDCard CS"
+#define D_SENSOR_WIEGAND_D0    "Wiegand D0"
+#define D_SENSOR_WIEGAND_D1    "Wiegand D1"
 
 // Units
 #define D_UNIT_AMPERE "安培"
diff --git a/tasmota/my_user_config.h b/tasmota/my_user_config.h
index 12f47d073..f62d2a6b7 100644
--- a/tasmota/my_user_config.h
+++ b/tasmota/my_user_config.h
@@ -710,6 +710,7 @@
   #define MAX31865_REF_RES    430                // Reference resistor (Usually 430Ω for a PT100, 4300Ω for a PT1000)
   #define MAX31865_PTD_BIAS   0                  // To calibrate your not-so-good PTD
 //#define USE_LMT01                                // Add support for TI LMT01 temperature sensor, count pulses on single GPIO (+0k5 code)
+//#define USE_WIEGAND                              // Add support for 24/26/32/34 bit RFID Wiegand interface (D0/D1) (+1k7 code)
 
 // -- IR Remote features - all protocols from IRremoteESP8266 --------------------------
 // IR Full Protocols mode is activated through platform.io only.
@@ -767,8 +768,6 @@
   #define USE_ZIGBEE_MAXTIME_SENSOR         60*60     // 1h
   #define USE_ZIGBEE_MAXTIME_LIGHT          60*60     // 1h
 
-
-
 // -- Other sensors/drivers -----------------------
 
 //#define USE_TM1638                               // Add support for TM1638 switches copying Switch1 .. Switch8 (+1k code)
diff --git a/tasmota/support_features.ino b/tasmota/support_features.ino
index 3a3597f2a..49c158653 100644
--- a/tasmota/support_features.ino
+++ b/tasmota/support_features.ino
@@ -704,7 +704,9 @@ void ResponseAppendFeatures(void)
 #ifdef USE_SEESAW_SOIL
     feature7 |= 0x02000000;  // xsns_81_seesaw_soil.ino
 #endif
-//    feature7 |= 0x04000000;
+#ifdef USE_WIEGAND
+    feature7 |= 0x04000000;  // xsns_82_wiegand.ino
+#endif
 //    feature7 |= 0x08000000;
 
 //    feature7 |= 0x10000000;
diff --git a/tasmota/tasmota_template.h b/tasmota/tasmota_template.h
index f2dbae6c4..40e90cccd 100644
--- a/tasmota/tasmota_template.h
+++ b/tasmota/tasmota_template.h
@@ -146,6 +146,7 @@ enum UserSelectablePins {
   GPIO_ROT1A_NP, GPIO_ROT1B_NP,        // Rotary switch
   GPIO_ADC_PH,                         // Analog PH Sensor
   GPIO_BS814_CLK, GPIO_BS814_DAT,      // Holtek BS814A2 touch ctrlr
+  GPIO_WIEGAND_D0, GPIO_WIEGAND_D1,    // Wiegand Data lines
   GPIO_SENSOR_END };
 
 enum ProgramSelectablePins {
@@ -312,6 +313,7 @@ const char kSensorNames[] PROGMEM =
   D_SENSOR_ROTARY " A_n|" D_SENSOR_ROTARY " B_n|"
   D_SENSOR_ADC_PH "|"
   D_SENSOR_BS814_CLK "|" D_SENSOR_BS814_DAT "|"
+  D_SENSOR_WIEGAND_D0 "|" D_SENSOR_WIEGAND_D1 "|"
   ;
 
 const char kSensorNamesFixed[] PROGMEM =
@@ -735,6 +737,10 @@ const uint16_t kGpioNiceList[] PROGMEM = {
   AGPIO(GPIO_MIEL_HVAC_TX),    // Mitsubishi Electric HVAC TX pin
   AGPIO(GPIO_MIEL_HVAC_RX),    // Mitsubishi Electric HVAC RX pin
 #endif
+#ifdef USE_WIEGAND
+  AGPIO(GPIO_WIEGAND_D0),      // Date line D0 of Wiegand devices
+  AGPIO(GPIO_WIEGAND_D1),      // Date line D1 of Wiegand devices
+#endif
 
 /*-------------------------------------------------------------------------------------------*\
  * ESP32 specifics
diff --git a/tasmota/xsns_82_wiegand.ino b/tasmota/xsns_82_wiegand.ino
new file mode 100644
index 000000000..57ebfba2a
--- /dev/null
+++ b/tasmota/xsns_82_wiegand.ino
@@ -0,0 +1,429 @@
+/*
+  xsns_82_wiegand.ino - Support for Wiegand Interface 125kHz NFC Tag Reader for Tasmota
+
+  Copyright (C) 2021  Sigurd Leuther 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_WIEGAND
+/*********************************************************************************************\
+  MQTT:
+  %prefix%/%topic%/SENSOR = {"Time":"2021-01-13T12:30:38","Wiegand":{"UID":"rfid tag"}}
+
+  Domoticz:
+  The nvalue will be always 0 and the svalue will contain the tag UID as string.
+\*********************************************************************************************/
+#warning **** Wiegand interface enabled ****
+
+#define XSNS_82                82
+
+#define WIEGAND_BIT_TIMEOUT    25 //time to be wait after last bit detected.
+// use only a randomly generate RFID for testing. using #define will save some space in the final code
+//  DEV_WIEGAND_TEST_MODE 1 : testing with random rfid without hardware connected, but GPIOs set correctly
+//  DEV_WIEGAND_TEST_MODE 2 : testing with hardware corretly connected.
+//
+#define DEV_WIEGAND_TEST_MODE  0
+
+#ifdef DEV_WIEGAND_TEST_MODE
+    #if (DEV_WIEGAND_TEST_MODE==0)
+    #elif (DEV_WIEGAND_TEST_MODE==1)
+      #warning "Wiegand Interface compiled with 'DEV_WIEGAND_TEST_MODE' 1 (Random RFID)"
+    #elif (DEV_WIEGAND_TEST_MODE==2)
+      #warning "Wiegand Interface compiled with 'DEV_WIEGAND_TEST_MODE' 2 (Hardware connected)"
+    #else
+      #warning "Wiegand Interface compiled with unknown mode"
+    #endif
+#endif
+
+class Wiegand {
+  public:
+
+    Wiegand(void);
+    void Init(void);
+    void ScanForTag(void);
+#ifdef USE_WEBSERVER
+    void Show(void);
+#endif
+
+  private:
+
+    uint64_t HexStringToDec(uint64_t);
+    uint64_t CheckAndConvertRfid(uint64_t,uint16_t);
+    char translateEnterEscapeKeyPress(char);
+    uint8_t CalculateParities(uint64_t, int);
+    bool WiegandConversion (void);
+    static void handleD0Interrupt(void);
+    static void handleD1Interrupt(void);
+
+    uint64_t rfid;
+    uint8_t tagSize;
+
+    static volatile uint64_t rfidBuffer;
+    static volatile uint16_t bitCount;
+    static volatile uint32_t lastFoundTime;
+    static volatile uint8_t timeOut;
+    bool isInit = false;
+
+#if (DEV_WIEGAND_TEST_MODE)==1
+    uint64_t GetRandomRfid(uint8_t);
+#endif
+};
+
+Wiegand* oWiegand = new Wiegand();
+uint8_t scanDelay;
+
+volatile uint64_t Wiegand::rfidBuffer;
+volatile uint16_t Wiegand::bitCount;
+volatile uint32_t Wiegand::lastFoundTime;
+volatile uint8_t Wiegand::timeOut;
+
+Wiegand::Wiegand()   {
+  rfid = 0;
+  lastFoundTime = 0;
+  tagSize = 0;
+  rfidBuffer = 0;
+  bitCount = 0 ;
+  timeOut = 0;
+  isInit= false;
+}
+
+#if (DEV_WIEGAND_TEST_MODE)==1
+uint64_t Wiegand::GetRandomRfid(uint8_t tag_size=34) {
+  //todo add support for 4 and 8 bit keyboard "tags"
+  uint64_t result = (uint32_t)HwRandom();
+  uint8_t parities = 0;
+  bitCount = tag_size;
+  timeOut=millis() - WIEGAND_BIT_TIMEOUT;
+  result = result << 32;
+  result += HwRandom();
+
+  switch (tag_size){
+    case 24:
+      result = (result & 0x7FFFFE) >>1;
+    break;
+    case 26:
+      result = (result & 0x1FFFFFE) >>1;
+    break;
+    case 32:
+      result = (result & 0x7FFFFFFE) >>1;
+    break;
+    case 34:
+      result = (result & 0x3FFFFFFFE) >>1;
+    break;
+    default:
+    break;
+  }
+  parities = CalculateParities(result, tag_size);
+
+  result = (result << 1) | (parities & 0x01); //set LSB parity
+  if (parities & 0x80) { //MSB parity is 1
+    switch (tag_size) {
+      case 24:
+        result |= 0x800000;
+      break;
+      case 26:
+        result |= 0x2000000;
+      break;
+      case 32:
+        result |= 0x80000000;
+      break;
+      case 34:
+        result |= 0x400000000;
+      break;
+      default:
+      break;
+    }
+  }
+
+ return result;
+}
+#endif
+
+void ICACHE_RAM_ATTR Wiegand::handleD1Interrupt() { // receive a 1 bit. (D0=high & D1=low)
+  rfidBuffer = (rfidBuffer << 1) | 1; // leftshift + 1 bit
+  bitCount++; //increment the counter
+  lastFoundTime = millis(); // last time bit found
+}
+
+void ICACHE_RAM_ATTR Wiegand::handleD0Interrupt() { // receive a 0 bit. (D0=low & D1=high)
+  rfidBuffer = rfidBuffer << 1; // leftshift the 0 bit is now at the end of rfidBuffer
+  bitCount++; //increment the counter
+  lastFoundTime = millis(); //last time bit found
+}
+
+void Wiegand::Init() {
+  isInit = false;
+  if (PinUsed(GPIO_WIEGAND_D0) && PinUsed(GPIO_WIEGAND_D1)) { //only start, if the Wiegang pins are
+        #if (DEV_WIEGAND_TEST_MODE)>0
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: Init()"));
+        #endif
+    pinMode(Pin(GPIO_WIEGAND_D0), INPUT_PULLUP);
+    pinMode(Pin(GPIO_WIEGAND_D1), INPUT_PULLUP);
+    attachInterrupt(Pin(GPIO_WIEGAND_D0),  handleD0Interrupt, FALLING);
+    attachInterrupt(Pin(GPIO_WIEGAND_D1),  handleD1Interrupt, FALLING);
+    isInit = true;  // helps to run only if correctly setup
+        #if (DEV_WIEGAND_TEST_MODE)>0
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: Testmode"));  // for tests without reader attaiched
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: D0:%u"),Pin(GPIO_WIEGAND_D0));
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: D1:%u"),Pin(GPIO_WIEGAND_D1));
+        #else
+    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: D0=%u, D1=%u"),Pin(GPIO_WIEGAND_D0), Pin(GPIO_WIEGAND_D1));
+        #endif
+  }
+  #if (DEV_WIEGAND_TEST_MODE)>0
+  else {
+    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: no GPIOs."));
+  }
+  #endif
+}
+
+uint64_t Wiegand::CheckAndConvertRfid(uint64_t rfidIn, uint16_t bitcount) {
+  uint8_t evenParityBit = 0;
+  uint8_t oddParityBit = (uint8_t) (rfidIn & 0x1); // last bit = odd parity
+  uint8_t calcParity = 0;
+  switch (bitcount) {
+    case 24:
+      evenParityBit = (rfidIn & 0x800000) ? 0x80 : 0;
+      rfidIn = (rfidIn & 0x7FFFFE) >>1;
+    break;
+
+    case 26:
+      evenParityBit = (rfidIn & 0x2000000) ? 0x80 : 0;
+      rfidIn = (rfidIn & 0x1FFFFFE) >>1;
+    break;
+
+    case 32:
+      evenParityBit = (rfidIn & 0x80000000) ? 0x80 : 0;
+      rfidIn = (rfidIn & 0x7FFFFFFE) >>1;
+    break;
+
+    case 34:
+      evenParityBit = (rfidIn & 0x400000000) ? 0x80 : 0;
+      rfidIn = (rfidIn & 0x3FFFFFFFE) >>1;
+    break;
+
+    default:
+    break;
+  }
+  calcParity = CalculateParities(rfidIn, bitCount);   //ckeck result on http://www.ccdesignworks.com/wiegand_calc.htm with raw tag as input
+  if (calcParity != (evenParityBit | oddParityBit)) { // Paritybit is wrong
+    rfidIn=0;
+    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: %llu parity error"), rfidIn);
+  }
+        #if (DEV_WIEGAND_TEST_MODE)>0
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: even (left) parity: %u "), (evenParityBit>>7));
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: even (calc) parity: %u "), (calcParity & 0x80)>>7);
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: odd (right) parity: %u "), oddParityBit);
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: odd (calc) parity: %u "), (calcParity & 0x01));
+        #endif
+  return rfidIn;
+}
+
+uint8_t Wiegand::CalculateParities(uint64_t tagWithoutParities, int tag_size=26) {
+  //tag_size is the size of the final tag including the 2 parity bits
+  //so length if the tagWithoutParities should be (tag_size-2) !! That will be not profed and
+  //lead to wrong results if the input value is larger!
+  //calculated start parity (even) will be returned as bit 8
+  //calculated end parity (odd) will be returned as bit 1
+  uint8_t retValue=0;
+  tag_size -= 2;
+  if (tag_size<=0) { return retValue; } //prohibit div zero exception and other wrong inputs
+  uint8_t parity=1; //check for odd parity on LSB
+  for (uint8_t i=0; i<(tag_size/2); i++) {
+    parity^=(tagWithoutParities & 1);
+    tagWithoutParities>>=1;
+    }
+  retValue |= parity;
+
+  parity=0; //check for even parity on MSB
+  while (tagWithoutParities) {
+    parity^=(tagWithoutParities & 1);
+    tagWithoutParities>>=1;
+    }
+  retValue |= (parity<<7);
+
+  return retValue;
+}
+
+char Wiegand::translateEnterEscapeKeyPress(char oKeyPressed) {
+	switch(oKeyPressed) {
+	case 0x0b:        // 11 or * key
+		return 0x0d;  // 13 or ASCII ENTER
+
+	case 0x0a:        // 10 or # key
+		return 0x1b;  // 27 or ASCII ESCAPE
+
+	default:
+		return oKeyPressed;
+	}
+}
+
+bool Wiegand::WiegandConversion ()
+{
+  bool bRet = false;
+	unsigned long nowTick = millis();
+	if ((nowTick - lastFoundTime) > WIEGAND_BIT_TIMEOUT)		//last bit found is WIEGAND_BIT_TIMEOUT ms ago
+	{
+          #if (DEV_WIEGAND_TEST_MODE)>0
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: raw tag: %llu "), rfidBuffer);
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: bit count: %u "), bitCount);
+          #endif
+      if ((bitCount==4)||(bitCount==8)||(bitCount==24)||(bitCount==26)||(bitCount==32)||(bitCount==34)) {
+        if ((bitCount==24)||(bitCount==26)||(bitCount==32)||(bitCount==34)) {
+          // 24,26,32,34-bit Wiegand codes
+          rfid = CheckAndConvertRfid( rfidBuffer, bitCount);
+          tagSize=bitCount;
+          bitCount=0;
+          rfidBuffer=0;
+          bRet=true;
+        }
+        if (bitCount==4) {
+          // 4-bit Wiegand codes for keypads
+          rfid = (int)translateEnterEscapeKeyPress(rfidBuffer & 0x0000000F);
+          tagSize = bitCount;
+          bitCount = 0;
+          rfidBuffer = 0;
+          bRet=true;
+        }
+        if (bitCount==8){
+          // 8-bit Wiegand codes for keypads with integrity
+          // 8-bit Wiegand keyboard data, high nibble is the "NOT" of low nibble
+          // eg if key 1 pressed, data=E1 in binary 11100001 , high nibble=1110 , low nibble = 0001
+          char highNibble = (rfidBuffer & 0xf0) >>4;
+          char lowNibble = (rfidBuffer & 0x0f);
+          if (lowNibble == (~highNibble & 0x0f))		// check if low nibble matches the "NOT" of high nibble.
+          {
+            rfid = (int)translateEnterEscapeKeyPress(lowNibble);
+            bRet=true;
+          }
+          else {
+            lastFoundTime=nowTick;
+            bRet=false;
+          }
+          tagSize=bitCount;
+          bitCount=0;
+          rfidBuffer=0;
+        }
+      }
+      else {
+        // time reached but unknown bitCount, clear and start again
+        lastFoundTime=nowTick;
+        bitCount=0;
+        rfidBuffer=0;
+        bRet=false;
+      }
+    }
+		else{
+	    bRet=false; // watching time not finished
+    }
+        #if (DEV_WIEGAND_TEST_MODE)>0
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: tag   out: %llu "), rfid);
+        AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: tag  size: %u"), tagSize);
+        #endif
+    return bRet;
+}
+
+void Wiegand::ScanForTag() {
+
+  if (!isInit)  { return;}
+          #if (DEV_WIEGAND_TEST_MODE)>0
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: ScanForTag()."));
+          #if (DEV_WIEGAND_TEST_MODE==1)
+          switch (millis() %4 ) {
+            case 0:
+              rfidBuffer = GetRandomRfid(24);
+            break;
+            case 1:
+              rfidBuffer = GetRandomRfid(26);
+            break;
+            case 2:
+              rfidBuffer = GetRandomRfid(32);
+            break;
+            case 3:
+              rfidBuffer = GetRandomRfid(34);
+            break;
+            default:
+              rfidBuffer = GetRandomRfid(34);
+            break;
+          }
+          AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: raw generated: %lX"), rfidBuffer);  // for tests without reader attaiched
+          #endif
+        #endif
+  if (bitCount > 0)   {
+    uint64_t oldTag = rfid;
+    bool newKey =  WiegandConversion();
+          #if (DEV_WIEGAND_TEST_MODE)>0
+                    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: previous tag: %llu"), oldTag);
+          #endif
+    if(newKey && (oldTag != rfid)) {
+      AddLog_P(LOG_LEVEL_INFO, PSTR("WIE:  new= %llu"), rfid);
+      }
+    else
+    { AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: prev= %llu"), rfid);}
+    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: bits= %u"), tagSize);
+    ResponseTime_P(PSTR(",\"Wiegand\":{\"UID\":\"%0llu\"}}"), rfid);
+    MqttPublishTeleSensor();
+  }
+}
+
+#ifdef USE_WEBSERVER
+void Wiegand::Show(void) {
+  if (!isInit) { return; }
+  WSContentSend_PD(PSTR("{s}Wiegand UID{m}%llu {e}"), rfid);
+  #if (DEV_WIEGAND_TEST_MODE)>0
+    AddLog_P(LOG_LEVEL_INFO,PSTR("WIE: Tag: %llu"), rfid);
+    AddLog_P(LOG_LEVEL_INFO, PSTR("WIE: %u bits"), bitCount);
+  #endif
+}
+#endif  // USE_WEBSERVER
+
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+bool Xsns82(byte function) {
+  bool result = false;
+
+  switch (function) {
+    case FUNC_INIT:
+      oWiegand->Init();
+      scanDelay = 1;
+      break;
+
+    case FUNC_EVERY_250_MSECOND: // some tags need more time, don't try shorter period
+            #if (DEV_WIEGAND_TEST_MODE)==1
+                  if (scanDelay>=4) // give a second because of the log entries to be send.
+            #else
+      if (scanDelay>=2) // only run every (delay * 250 ms) (every 250ms is too fast for some tags)
+            #endif
+      {
+        oWiegand->ScanForTag();
+        scanDelay = 1;
+      }
+      else {
+        scanDelay++;
+      }
+      break;
+
+    #ifdef USE_WEBSERVER
+    case FUNC_WEB_SENSOR:
+      oWiegand->Show();
+      break;
+    #endif  // USE_WEBSERVER
+  }
+  return result;
+}
+#endif  // USE_WIEGAND
\ No newline at end of file
diff --git a/tools/decode-status.py b/tools/decode-status.py
index 8d8bfc7ba..f6b6f923d 100755
--- a/tools/decode-status.py
+++ b/tools/decode-status.py
@@ -244,7 +244,7 @@ a_features = [[
     "USE_SHELLY_DIMMER","USE_RC522","USE_FTC532","USE_DISPLAY_EPAPER_42",
     "USE_DISPLAY_ILI9488","USE_DISPLAY_SSD1351","USE_DISPLAY_RA8876","USE_DISPLAY_ST7789",
     "USE_DISPLAY_SSD1331","USE_UFILESYS","USE_TIMEPROP","USE_PID",
-    "USE_BS814A2","USE_SEESAW_SOIL","","",
+    "USE_BS814A2","USE_SEESAW_SOIL","USE_WIEGAND","",
     "","","",""
     ]]
 
@@ -273,7 +273,7 @@ else:
         obj = json.load(fp)
 
 def StartDecode():
-    print ("\n*** decode-status.py v20210111 by Theo Arends and Jacek Ziolkowski ***")
+    print ("\n*** decode-status.py v20210116 by Theo Arends and Jacek Ziolkowski ***")
 
 #    print("Decoding\n{}".format(obj))