diff --git a/tasmota/include/tasmota_template.h b/tasmota/include/tasmota_template.h
index 946dffea0..f64bd3737 100644
--- a/tasmota/include/tasmota_template.h
+++ b/tasmota/include/tasmota_template.h
@@ -231,6 +231,7 @@ enum UserSelectablePins {
   GPIO_TWAI_TX, GPIO_TWAI_RX, GPIO_TWAI_BO, GPIO_TWAI_CLK,  // ESP32 TWAI serial interface
   GPIO_C8_CO2_5K_TX, GPIO_C8_CO2_5K_RX, // C8-CO2-5K CO2 Sensor
   GPIO_V9240_TX, GPIO_V9240_RX,         //  V9240 serial interface
+  GPIO_LD2402_TX, GPIO_LD2402_RX,       // HLK-LD2402
   GPIO_SENSOR_END };
 
 // Error as warning to rethink GPIO usage with max 2045
@@ -509,6 +510,7 @@ const char kSensorNames[] PROGMEM =
   D_SENSOR_TWAI_TX "|" D_SENSOR_TWAI_RX "|" D_SENSOR_TWAI_BO "|" D_SENSOR_TWAI_CLK "|"
   D_SENSOR_C8_CO2_5K_TX "|" D_SENSOR_C8_CO2_5K_RX "|"
   D_SENSOR_V9240_TX "|" D_SENSOR_V9240_RX
+  D_SENSOR_LD2402_TX "|" D_SENSOR_LD2402_RX
   ;
 
 const char kSensorNamesFixed[] PROGMEM =
@@ -1126,6 +1128,10 @@ const uint16_t kGpioNiceList[] PROGMEM = {
   AGPIO(GPIO_CM11_TXD),                          // CM110x Serial interface
   AGPIO(GPIO_CM11_RXD),                          // CM110x Serial interface
 #endif
+#ifdef USE_LD2402
+  AGPIO(GPIO_LD2402_TX),                         // HLK-LD2402 Serial interface
+  AGPIO(GPIO_LD2402_RX),                         // HLK-LD2402 Serial interface
+#endif
 #ifdef USE_LD2410
   AGPIO(GPIO_LD2410_TX),                         // HLK-LD2410 Serial interface
   AGPIO(GPIO_LD2410_RX),                         // HLK-LD2410 Serial interface
diff --git a/tasmota/language/af_AF.h b/tasmota/language/af_AF.h
index aeb690224..b9ce56bb7 100644
--- a/tasmota/language/af_AF.h
+++ b/tasmota/language/af_AF.h
@@ -58,6 +58,7 @@
 #define D_AS "as"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Lading"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Ontfout"
 #define D_DEWPOINT "Dou punt"
 #define D_DISABLED "Gedeaktiveer"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Afstand"
 #define D_DNS_SERVER "DNS"
 #define D_DO "Opgeloste suurstof"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/bg_BG.h b/tasmota/language/bg_BG.h
index 54e4fda15..8bcf0ed11 100644
--- a/tasmota/language/bg_BG.h
+++ b/tasmota/language/bg_BG.h
@@ -58,6 +58,7 @@
 #define D_AS "като"
 #define D_AT "at"
 #define D_AUTO "АВТОМАТИЧНО"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Бат."                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Премахване на дефекти"
 #define D_DEWPOINT "Температура на оросяване"
 #define D_DISABLED "Забранено"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Разстояние"
 #define D_DNS_SERVER "Сървър на DNS"
 #define D_DO "Разтворен кислород"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/ca_AD.h b/tasmota/language/ca_AD.h
index 373ee312f..61501b131 100644
--- a/tasmota/language/ca_AD.h
+++ b/tasmota/language/ca_AD.h
@@ -58,6 +58,7 @@
 #define D_AS "com"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Bat"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"  // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Depuració"
 #define D_DEWPOINT "Punt de rossada"
 #define D_DISABLED "Deshabilitat"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distancia"
 #define D_DNS_SERVER "Servidor DNS"
 #define D_DO "Oxígen dissolt"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/cs_CZ.h b/tasmota/language/cs_CZ.h
index 7e4a1d6a2..ef7f3ef19 100644
--- a/tasmota/language/cs_CZ.h
+++ b/tasmota/language/cs_CZ.h
@@ -58,6 +58,7 @@
 #define D_AS "jako"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Zablokováno"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distance"
 #define D_DNS_SERVER "Server DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/de_DE.h b/tasmota/language/de_DE.h
index d48df566b..f00f11fcf 100644
--- a/tasmota/language/de_DE.h
+++ b/tasmota/language/de_DE.h
@@ -58,6 +58,7 @@
 #define D_AS "als"
 #define D_AT "an"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Batterie"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Ladung"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "debug"
 #define D_DEWPOINT "Taupunkt"
 #define D_DISABLED "deaktiviert"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Abstand"
 #define D_DNS_SERVER "DNS-Server"
 #define D_DO "gelöster Sauerstoff"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/el_GR.h b/tasmota/language/el_GR.h
index 72f00e61c..0521ed281 100644
--- a/tasmota/language/el_GR.h
+++ b/tasmota/language/el_GR.h
@@ -58,6 +58,7 @@
 #define D_AS "ως"
 #define D_AT "at"
 #define D_AUTO "ΑΥΤΟΜΑΤΟ"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Ανενεργό"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Απόσταση"
 #define D_DNS_SERVER "Διακομιστής DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/en_GB.h b/tasmota/language/en_GB.h
index f9de343bc..ede817f25 100644
--- a/tasmota/language/en_GB.h
+++ b/tasmota/language/en_GB.h
@@ -58,6 +58,7 @@
 #define D_AS "as"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Disabled"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distance"
 #define D_DNS_SERVER "DNS Server"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX    "LD2410S Tx"
diff --git a/tasmota/language/es_ES.h b/tasmota/language/es_ES.h
index a17b1f628..d59695f99 100644
--- a/tasmota/language/es_ES.h
+++ b/tasmota/language/es_ES.h
@@ -58,6 +58,7 @@
 #define D_AS "como"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Bat"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Punto de Rocío"
 #define D_DISABLED "Deshabilitado"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distancia"
 #define D_DNS_SERVER "Servidor DNS"
 #define D_DO "Oxígeno Disuelto"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/fr_FR.h b/tasmota/language/fr_FR.h
index 403304737..51529ee98 100644
--- a/tasmota/language/fr_FR.h
+++ b/tasmota/language/fr_FR.h
@@ -58,6 +58,7 @@
 #define D_AS "comme"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Point de rosée"
 #define D_DISABLED "Désactivé"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distance"
 #define D_DNS_SERVER "Serveur DNS"
 #define D_DO "Oxygène dissout"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/fy_NL.h b/tasmota/language/fy_NL.h
index 0c362f0ba..e381ce01f 100644
--- a/tasmota/language/fy_NL.h
+++ b/tasmota/language/fy_NL.h
@@ -58,6 +58,7 @@
 #define D_AS "als"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Lading"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debugearje"
 #define D_DEWPOINT "Dauwpunt"
 #define D_DISABLED "Útsetten"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Ôfstân"
 #define D_DNS_SERVER "DNS Server"
 #define D_DO "Oploste soerstof"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/he_HE.h b/tasmota/language/he_HE.h
index ab67db617..7fee7c024 100644
--- a/tasmota/language/he_HE.h
+++ b/tasmota/language/he_HE.h
@@ -58,6 +58,7 @@
 #define D_AS "-כ"
 #define D_AT "at"
 #define D_AUTO "אוטומטי"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "באגים"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "מבוטל"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "מרחק"
 #define D_DNS_SERVER "DNS שרת"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/hu_HU.h b/tasmota/language/hu_HU.h
index 87cb26693..6a27e71f6 100644
--- a/tasmota/language/hu_HU.h
+++ b/tasmota/language/hu_HU.h
@@ -58,6 +58,7 @@
 #define D_AS "mint"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Harmatpont"
 #define D_DISABLED "Letiltva"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Távolság"
 #define D_DNS_SERVER "DNS szerver"
 #define D_DO "Oldott oxygén"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/it_IT.h b/tasmota/language/it_IT.h
index 3a9db30cc..0d2fc54c9 100644
--- a/tasmota/language/it_IT.h
+++ b/tasmota/language/it_IT.h
@@ -58,6 +58,7 @@
 #define D_AS                   "come"
 #define D_AT                   "in"
 #define D_AUTO                 "AUTO"
+#define D_AUTO_UPDATE          "Auto Update"
 #define D_BATTERY              "Batteria"
 #define D_BATT                 "Batt"                 // Short for Battery
 #define D_BATTERY_CHARGE       "Carica"               // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG                "Debug"
 #define D_DEWPOINT             "Punto rugiada" //
 #define D_DISABLED             "Disabilitato/a"
+#define D_DISCONNECTED         "Disconnected"
 #define D_DISTANCE             "Distanza"
 #define D_DNS_SERVER           "Server DNS"
 #define D_DO                   "Ossigeno dissolto"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX              "SDM630 - RX"
 #define D_SENSOR_WE517_TX               "WE517 - TX"
 #define D_SENSOR_WE517_RX               "WE517 - RX"
+#define D_SENSOR_LD2402_TX              "LD2402 - Tx"
+#define D_SENSOR_LD2402_RX              "LD2402 - Rx"
 #define D_SENSOR_LD2410_TX              "LD2410 - TX"
 #define D_SENSOR_LD2410_RX              "LD2410 - RX"
 #define D_SENSOR_LD2410S_TX             "LD2410S - TX"
diff --git a/tasmota/language/ko_KO.h b/tasmota/language/ko_KO.h
index fda914fd7..27204a1d5 100644
--- a/tasmota/language/ko_KO.h
+++ b/tasmota/language/ko_KO.h
@@ -58,6 +58,7 @@
 #define D_AS "as"
 #define D_AT "at"
 #define D_AUTO "자동"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "디버그"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "사용안함"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "거리"
 #define D_DNS_SERVER "DNS 서버"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/lt_LT.h b/tasmota/language/lt_LT.h
index d03792699..ffb2488ff 100644
--- a/tasmota/language/lt_LT.h
+++ b/tasmota/language/lt_LT.h
@@ -58,6 +58,7 @@
 #define D_AS "kaip"
 #define D_AT "prie"
 #define D_AUTO "AUTOMATINĖ"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Baterija"
 #define D_BATT "Baterija"             // Short for Battery
 #define D_BATTERY_CHARGE "Įkrova"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Derinimas"
 #define D_DEWPOINT "Rasos taškas"
 #define D_DISABLED "Išjungta"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Atstumas"
 #define D_DNS_SERVER "DNS Serveris"
 #define D_DO "Ištirpęs deguonis"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX    "LD2410S Tx"
diff --git a/tasmota/language/nl_NL.h b/tasmota/language/nl_NL.h
index cffeb5fc9..6e3fcb7f9 100644
--- a/tasmota/language/nl_NL.h
+++ b/tasmota/language/nl_NL.h
@@ -58,6 +58,7 @@
 #define D_AS "als"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Lading"    // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dauwpunt"
 #define D_DISABLED "Uitgeschakeld"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Afstand"
 #define D_DNS_SERVER "DNS Server"
 #define D_DO "Opgelost zuurstof"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/pl_PL.h b/tasmota/language/pl_PL.h
index 801924e5b..0bba643ab 100644
--- a/tasmota/language/pl_PL.h
+++ b/tasmota/language/pl_PL.h
@@ -58,6 +58,7 @@
 #define D_AS "jak"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Bateria"
 #define D_BATT "Bat"                // Short for Battery
 #define D_BATTERY_CHARGE "Ładowanie"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Punkt rosy"
 #define D_DISABLED "Wyłączony"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Odległość"
 #define D_DNS_SERVER "Serwer DNS"
 #define D_DO "Rozpuszczalność tlenu"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/pt_BR.h b/tasmota/language/pt_BR.h
index cf26085df..68002b940 100644
--- a/tasmota/language/pt_BR.h
+++ b/tasmota/language/pt_BR.h
@@ -58,6 +58,7 @@
 #define D_AS "como"
 #define D_AT "at"
 #define D_AUTO "Auto"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Bat"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"  // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Depurar"
 #define D_DEWPOINT "Ponto de orvalho"
 #define D_DISABLED "Desabilitado"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distância"
 #define D_DNS_SERVER "Servidor DNS"
 #define D_DO "Oxigênio dissolvido"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/pt_PT.h b/tasmota/language/pt_PT.h
index 7b7d90d5a..9b0800b13 100644
--- a/tasmota/language/pt_PT.h
+++ b/tasmota/language/pt_PT.h
@@ -58,6 +58,7 @@
 #define D_AS "como"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Depurar"
 #define D_DEWPOINT "Ponto de Condensação"
 #define D_DISABLED "Disabilitado"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distância"
 #define D_DNS_SERVER "Servidor DNS"
 #define D_DO "Oxigénio Dissolvido"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/ro_RO.h b/tasmota/language/ro_RO.h
index 9898d3128..fcd19e50e 100644
--- a/tasmota/language/ro_RO.h
+++ b/tasmota/language/ro_RO.h
@@ -58,6 +58,7 @@
 #define D_AS "as"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Depanare"
 #define D_DEWPOINT "Punct de rouă"
 #define D_DISABLED "Dezactivat"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distanță"
 #define D_DNS_SERVER "Server DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/ru_RU.h b/tasmota/language/ru_RU.h
index fc935ace2..df1fa52c8 100644
--- a/tasmota/language/ru_RU.h
+++ b/tasmota/language/ru_RU.h
@@ -59,6 +59,7 @@
 #define D_AS "как"
 #define D_AT "at"
 #define D_AUTO "АВТО"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -89,6 +90,7 @@
 #define D_DEBUG "Отладка"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Блокирован"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Расстояние"
 #define D_DNS_SERVER "DNS Сервер"
 #define D_DO "Disolved Oxygen"
@@ -777,6 +779,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/sk_SK.h b/tasmota/language/sk_SK.h
index c6e37b675..3a62082de 100644
--- a/tasmota/language/sk_SK.h
+++ b/tasmota/language/sk_SK.h
@@ -58,6 +58,7 @@
 #define D_AS "ako"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -90,6 +91,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Zablokované"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Vzdialenosť"
 #define D_DNS_SERVER "Server DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/sv_SE.h b/tasmota/language/sv_SE.h
index 1314ca049..f21ed90d1 100644
--- a/tasmota/language/sv_SE.h
+++ b/tasmota/language/sv_SE.h
@@ -58,6 +58,7 @@
 #define D_AS "som"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Debug"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Inaktiverad"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Distans"
 #define D_DNS_SERVER "DNS-server"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/tr_TR.h b/tasmota/language/tr_TR.h
index 228e6da08..6795e5e84 100644
--- a/tasmota/language/tr_TR.h
+++ b/tasmota/language/tr_TR.h
@@ -58,6 +58,7 @@
 #define D_AS "as"
 #define D_AT "at"
 #define D_AUTO "OTOMATIK"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Hata Ayıklama"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "Etkin Değil"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Mesage"
 #define D_DNS_SERVER "DNS Sunucu"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/uk_UA.h b/tasmota/language/uk_UA.h
index c9e9a267f..f1c49089d 100644
--- a/tasmota/language/uk_UA.h
+++ b/tasmota/language/uk_UA.h
@@ -58,6 +58,7 @@
 #define D_AS "як"
 #define D_AT "at"
 #define D_AUTO "АВТО"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Налагодження"
 #define D_DEWPOINT "Tочка роси"
 #define D_DISABLED "Вимкнено"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Відстань"
 #define D_DNS_SERVER "Сервер DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/vi_VN.h b/tasmota/language/vi_VN.h
index 9079f40e3..968cb05b4 100644
--- a/tasmota/language/vi_VN.h
+++ b/tasmota/language/vi_VN.h
@@ -58,6 +58,7 @@
 #define D_AS "với tên gọi"
 #define D_AT "at"
 #define D_AUTO "AUTO"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "Tìm lỗi"
 #define D_DEWPOINT "Điểm sương"
 #define D_DISABLED "Vô hiệu hóa"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "Khoảng cách"
 #define D_DNS_SERVER "Máy chủ DNS"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/zh_CN.h b/tasmota/language/zh_CN.h
index 520e90d0d..20523c5d5 100644
--- a/tasmota/language/zh_CN.h
+++ b/tasmota/language/zh_CN.h
@@ -58,6 +58,7 @@
 #define D_AS "名称:"
 #define D_AT "at"
 #define D_AUTO "自动"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "Batt"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"   // Battery charge in %
@@ -88,6 +89,7 @@
 #define D_DEBUG "调试"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "禁用"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "距离"
 #define D_DNS_SERVER "DNS服务器"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/language/zh_TW.h b/tasmota/language/zh_TW.h
index a3f615d2f..0d96ca41f 100644
--- a/tasmota/language/zh_TW.h
+++ b/tasmota/language/zh_TW.h
@@ -58,6 +58,7 @@
 #define D_AS "名稱:"
 #define D_AT "at"
 #define D_AUTO "自動"
+#define D_AUTO_UPDATE "Auto Update"
 #define D_BATTERY "Battery"
 #define D_BATT "電池"                // Short for Battery
 #define D_BATTERY_CHARGE "Charge"  // Battery charge in % 
@@ -88,6 +89,7 @@
 #define D_DEBUG "偵錯"
 #define D_DEWPOINT "Dew point"
 #define D_DISABLED "已停用"
+#define D_DISCONNECTED "Disconnected"
 #define D_DISTANCE "距離"
 #define D_DNS_SERVER "DNS伺服器"
 #define D_DO "Disolved Oxygen"
@@ -776,6 +778,8 @@
 #define D_SENSOR_SDM630_RX     "SDM630 Rx"
 #define D_SENSOR_WE517_TX      "WE517 Tx"
 #define D_SENSOR_WE517_RX      "WE517 Rx"
+#define D_SENSOR_LD2402_TX     "LD2402 Tx"
+#define D_SENSOR_LD2402_RX     "LD2402 Rx"
 #define D_SENSOR_LD2410_TX     "LD2410 Tx"
 #define D_SENSOR_LD2410_RX     "LD2410 Rx"
 #define D_SENSOR_LD2410S_TX     "LD2410S Tx"
diff --git a/tasmota/tasmota_xsns_sensor/xsns_102_ld2402.ino b/tasmota/tasmota_xsns_sensor/xsns_102_ld2402.ino
new file mode 100644
index 000000000..0a91aa428
--- /dev/null
+++ b/tasmota/tasmota_xsns_sensor/xsns_102_ld2402.ino
@@ -0,0 +1,939 @@
+/*
+  xsns_102_ld2402.ino - HLK-LD2402 24GHz smart wave motion sensor support for Tasmota
+
+  Copyright (C) 2025  Anthony Sepa
+
+  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/>.
+
+  Based in part on xsns_102_ld2410s.ino by:
+  SPDX-FileCopyrightText: 2022 Theo Arends, 2024 md5sum-as (https://github.com/md5sum-as)
+
+  SPDX-License-Identifier: GPL-3.0-only
+*/
+
+#ifdef USE_LD2402
+
+/*********************************************************************************************\
+ * HLK-LD2402 24GHz smart wave motion sensor
+ * 
+ * Attention!
+ * This module works with HLK-LD2402 devices. 
+ * 
+ * Available commands:
+ * LD2402_Status 0|1|2 - showing parameters|sensor readings|firmware info
+ * LD2402_ReRead - reread common, motion and micro threshold parameters from device
+ * LD2402_SetCommon 7-100,0-65535 - set common: maximum distance, disappearance delay
+ * LD2402_SetMotion n,n1..n16 - set motion threshold values (16)
+ * LD2402_SetMicro n,n1..n16 - set micro threshold values (16)
+ * LD2402_Mode 0/1 - set device output mode 0-normal, 1-engineering
+ * LD2402_AutoUpdate 3.0,2.0,3.0 - start autoupdate trigger,keep,micro magnification factor
+ * LD2402_Follow 0/n - reports every n seconds
+ *
+\*********************************************************************************************/
+
+#define XSNS_102                        102
+
+// Max line length is in engineering mode at 141 characters
+#define LD2402_BUFFER_SIZE              141
+
+#define LD2402_NUM_GATES                0x10
+
+// control commands
+#define LD2402_CMND_NOCMND              0x02
+
+// use command values << 4 (to allow delay space) as steps
+#define LD2402_CMND_READ_VERSION        0x00F
+#define LD2402_CMND_READ_SERIAL         0x11F
+#define LD2402_CMND_WRITE_PARAM         0x07F
+#define LD2402_CMND_READ_PARAM          0x08F
+#define LD2402_CMND_AUTO_THRESHOLD      0x09F
+#define LD2402_CMND_AUTO_PROGRESS       0x0AF
+#define LD2402_CMND_MODE                0x12F
+#define LD2402_CMND_AUTO_INTERFERENCE   0x14F
+#define LD2402_CMND_SAVE_PARAM          0xFDF
+#define LD2402_CMND_END_CONFIGURATION   0xFEF
+#define LD2402_CMND_START_CONFIGURATION 0xFFF
+
+#define CMD_LD2402_TIMEOUT_DELAY        8
+#define CMD_LD2402_BOOT_DELAY           3
+#define CMD_LD2402_Done                 0x01
+#define CMD_LD2402_Wait_Timeout         (CMD_LD2402_Done+CMD_LD2402_TIMEOUT_DELAY+1)
+
+#define CMD_LD2402_END_DELAY            2
+#define CMD_LD2402_PROGRESS_DELAY       7
+
+#define LD2402_CMND_PARAM_MAX_DISTANCE  0x01
+#define LD2402_CMND_PARAM_DISP_DELAY    0x04
+#define LD2402_CMND_PARAM_PWR_INTERFER  0x05
+#define LD2402_CMND_PARAM_MOTION_START  0x10
+#define LD2402_CMND_PARAM_MOTION_END    LD2402_CMND_PARAM_MOTION_START + LD2402_NUM_GATES - 1
+#define LD2402_CMND_PARAM_MICRO_START   0x30
+#define LD2402_CMND_PARAM_MICRO_END     LD2402_CMND_PARAM_MICRO_START + LD2402_NUM_GATES - 1
+
+#define LD2402_target_Error             0x4572726f
+#define LD2402_target_OFF               0x4F46460D
+#define LD2402_target_distance          0x64697374
+#define LD2402_config_header            0xFDFCFBFA
+#define LD2402_config_header_a          {0xFD, 0xFC, 0xFB, 0xFA}
+#define LD2402_engineering_header       0xF4F3F2F1
+#define LD2402_config_footer            0x04030201
+const uint8_t LD2402_config_footer_a[4] {0x04, 0x03, 0x02, 0x01};
+#define LD2402_engineering_footer       0xF8F7F6F5
+
+#include <TasmotaSerial.h>
+TasmotaSerial *LD2402Serial = nullptr;
+
+union uint32_union {
+  uint8_t buffer[4];
+  uint32_t buffer_32;
+};
+
+struct {
+  uint8_t *buffer;
+  uint8_t cmnd_param[8] = {};
+  uint32_t initializing;
+  uint32_t busy;
+  uint32_t step;
+  uint32_t next_step;
+  uint32_t sent_ack = LD2402_CMND_NOCMND;
+// Static params
+  char *version = NULL;
+  char *serial_number = NULL;
+// Detection Parameters
+  uint32_t max_distance;
+  uint32_t disp_delay;
+  uint8_t motion_threshold[LD2402_NUM_GATES * 4];
+  uint8_t micro_threshold[LD2402_NUM_GATES * 4];
+// Results
+  uint32_t pwr_interf;
+  char gates[20] = "FFFF FFFF FFFF FFFF";
+// Report values
+  uint32_t person;
+  uint32_t detect_distance;
+  uint8_t motion_energy[LD2402_NUM_GATES * 4];
+  uint8_t micro_energy[LD2402_NUM_GATES * 4];
+// program flow
+  uint32_t follow;
+  uint32_t timer;
+  uint32_t report_type;
+// autoupdate
+  uint32_t auto_upd_progress;
+// endianess
+  uint32_t is_big;
+} LD2402;
+
+#define D_LD2402        "LD2402"
+#define D_LD2402_LOG_PREFIX  "LD2: "
+#define D_BUSY_MSG      "{\"" D_LD2402 "\":\"Busy, wait till finished current command.\"}"
+#define D_COMMAND_PREFIX_JSON      "{\"" D_LD2402 "_%s\":"
+#define D_COMMAND_HELP_MSG         D_COMMAND_PREFIX_JSON "\"%s\"}"
+/********************************************************************************************/
+
+void Ld2402HandleEngineeringData(void) {
+  /* 
+  01        - 0 type
+  9100      - 1,2 distance
+  F6110000 6C0A0000 3D020000 A3020000 20030000 50060000 57030000 48010000 F3010000 3B010000 07010000 00010000 D2000000 23010000 F3000000 F4000000 - 3+ motion gates
+  B1270300 F30B0100 703E0000 8E120000 C5080000 3F100000 25030000 7A060000 7F080000 7E070000 FB050000 64040000 F3040000 2D040000 F9030000 43040000 - 67micro gates
+  */
+  LD2402.report_type = 1;
+  LD2402.detect_distance = LD2402.buffer[2] << 8 | LD2402.buffer[1];
+  LD2402.person = LD2402.buffer[0];
+  memcpy(LD2402.motion_energy, LD2402.buffer + 3, LD2402_NUM_GATES * 4);
+  memcpy(LD2402.micro_energy, LD2402.buffer + 67, LD2402_NUM_GATES * 4);
+}
+
+void Ld2402ToBinary(char *buffer, uint32_t byte_h, uint32_t byte_l) {
+  uint32_t mask_01 = 0x01, mask_10 = 0x10;
+  for (uint32_t i = 4; i; i--) {
+    buffer[i-1] = (byte_h & mask_10) ? '1' : '0';
+    buffer[i+4] = (byte_h & mask_01) ? '1' : '0';
+    buffer[i+9] = (byte_l & mask_10) ? '1' : '0';
+    buffer[i+14] = (byte_h & mask_01) ? '1' : '0';
+    mask_10<<=1;
+    mask_01<<=1;
+  }
+}
+
+void Ld2402HandleConfigData(void) {
+  uint32_t rcvd_ack = LD2402.buffer[0];
+  if (rcvd_ack != LD2402.sent_ack) {
+    return;
+  }
+  if (1 != LD2402.buffer[1]) {
+    // maybe do a retry?
+    return;
+  }
+
+  if (LD2402_CMND_READ_VERSION>>4 == rcvd_ack) {
+    // 00010000060076332E332E32
+    // 0   2   4   6
+    uint32_t len = LD2402.buffer[4];
+    free(LD2402.version);
+    LD2402.version = (char*)malloc(len+1);
+    memcpy(LD2402.version, LD2402.buffer + 6, len);
+    LD2402.version[len] = 0;
+    DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Rcvd %s"), LD2402.version);
+  } else if (LD2402_CMND_READ_SERIAL>>4 == rcvd_ack) {
+    // 1101000008004646464646464646
+    // 0   2   4   6
+    uint32_t len = LD2402.buffer[4];
+    free(LD2402.serial_number);
+    LD2402.serial_number = (char*)malloc(len+1);
+    memcpy(LD2402.serial_number, LD2402.buffer + 6, len);
+    LD2402.serial_number[len] = 0;
+    DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Rcvd %s"), LD2402.serial_number);
+  } else if (LD2402_CMND_READ_PARAM>>4 == rcvd_ack) {
+    // 
+    switch (LD2402.cmnd_param[0]) {
+    // common params
+    case LD2402_CMND_PARAM_MAX_DISTANCE:
+      LD2402.max_distance = LD2402.buffer[4];
+      break;
+    case LD2402_CMND_PARAM_DISP_DELAY:
+      LD2402.disp_delay = LD2402.buffer[5] << 8 | LD2402.buffer[4];
+      break;
+    case LD2402_CMND_PARAM_PWR_INTERFER:
+      LD2402.pwr_interf = LD2402.buffer[4];
+      break;
+    default:
+      switch (LD2402.cmnd_param[0] & 0xF0) {
+      // gate specific params
+      case LD2402_CMND_PARAM_MOTION_START:
+        memcpy(LD2402.motion_threshold + (LD2402.cmnd_param[0] & 0x0F) * 4, LD2402.buffer + 4, 4);
+        break;
+      case LD2402_CMND_PARAM_MICRO_START:
+        memcpy(LD2402.micro_threshold + (LD2402.cmnd_param[0] & 0x0F) * 4, LD2402.buffer + 4, 4);
+        break;
+      default:
+        break;
+      }
+      break;
+    }
+  } else if ((LD2402_CMND_AUTO_PROGRESS>>4) == rcvd_ack) {
+    // 0A0100003C00
+    // 0   2   4
+    LD2402.auto_upd_progress = LD2402.buffer[4];
+    LD2402.report_type = 3;
+  } else if (LD2402_CMND_AUTO_INTERFERENCE>>4 == rcvd_ack) {
+    // 140100000000
+    // 0   2   4
+    Ld2402ToBinary(LD2402.gates, LD2402.buffer[5], LD2402.buffer[4]);
+  }
+  Ld2402OnDemand(rcvd_ack);
+}
+
+void Ld2402Input(void) {
+  uint32_t avail;
+  while (LD2402Serial->available()) {
+    static uint32_union header;
+    static uint32_union footer;
+    static uint32_t data_type = 0, byte_counter = 0;
+    if (!data_type) {
+      if (!byte_counter) {
+        avail = LD2402Serial->available();
+        if (avail < 4) {
+          DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Don't have enough for header."));
+          break;
+        }
+        for (uint32_t i = 3; i; i--) {
+          header.buffer_32<<=8;
+          header.buffer[LD2402.is_big*3] = LD2402Serial->read();
+        }
+        byte_counter = 4;
+      }
+  
+      avail = LD2402Serial->available();
+      header.buffer_32<<=8;
+      header.buffer[LD2402.is_big*3] = LD2402Serial->read();
+
+      // I will get out of this mess with either:
+      //  - Config/Engineering header match, set data_type (most likely/quickest further processing)
+      //  - Known text match, process line, clear byte count for next line (less likely but no further processing)
+      //  - No header matches, continue, shift in the next character if/when available
+      data_type = (LD2402_engineering_header == header.buffer_32) ? 2 : 0;
+      if (!data_type) {
+        data_type = (LD2402_config_header == header.buffer_32) ? 3 : 0;
+        if (!data_type) {
+          if (LD2402_target_Error != header.buffer_32) {
+            if (LD2402_target_OFF != header.buffer_32) {
+              if (LD2402_target_distance != header.buffer_32) {
+                continue;
+              } else {
+                // process distance line
+                byte_counter = LD2402Serial->readBytesUntil(0x0A, LD2402.buffer, LD2402_BUFFER_SIZE);
+                LD2402.buffer[byte_counter] = 0;
+                DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Dist%s"), LD2402.buffer);
+                // ance:105\r\n
+                LD2402.detect_distance = atoi((char*) LD2402.buffer + 5);
+                LD2402.person = 2;
+              }
+            } else {
+              // process OFF line
+              LD2402.detect_distance = 0;
+              LD2402.person = 0;
+              LD2402Serial->read();
+            }
+            LD2402.report_type = 2;
+          } else {
+            // preocess Error line
+            byte_counter = LD2402Serial->readBytesUntil(0x0A, LD2402.buffer, LD2402_BUFFER_SIZE);
+            LD2402.buffer[byte_counter] = 0;
+            AddLog(LOG_LEVEL_INFO, PSTR(D_LD2402_LOG_PREFIX "Erro%s"), LD2402.buffer);
+            LD2402.report_type = 0;
+          }
+          byte_counter = 0;
+          break;
+        }
+      }
+    }
+
+    static uint32_t length, got;
+    if (byte_counter < 6) {
+      avail = LD2402Serial->available();
+      if (avail < 2) {
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Don't have enough for length."));
+        break;
+      }
+      length = LD2402Serial->read();
+      LD2402Serial->read();
+      got = 0;
+      if (length > LD2402_BUFFER_SIZE) {
+        data_type = 0;
+        byte_counter = 0;
+        break;
+      }
+      byte_counter = 6;
+    }
+
+    avail = LD2402Serial->available();
+    if (avail < (length - got)) {
+      got += LD2402Serial->readBytes(LD2402.buffer + got, avail);
+      break;
+    }
+    if (got < length) {
+      got += LD2402Serial->readBytes(LD2402.buffer + got, length - got);
+    }
+
+    avail = LD2402Serial->available();
+    if (avail < 4) {
+      DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Don't have enough for footer."));
+      break;
+    }
+    for (uint32_t i = 4; i; i--) {
+      footer.buffer_32<<=8;
+      footer.buffer[LD2402.is_big*3] = LD2402Serial->read();
+    }
+
+    if (2 == data_type) {
+      if (LD2402_engineering_footer == footer.buffer_32) {
+        Ld2402HandleEngineeringData();
+      } else {
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Head %*_H"), 4, header.buffer);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Eng %*_H"), length, LD2402.buffer);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "byte_counter: %d, avail: %d, got %d, length %d"), byte_counter, avail, got, length);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Foot %*_H"), 4, footer.buffer);
+      }
+    } else {
+      if (LD2402_config_footer == footer.buffer_32) {
+        Ld2402HandleConfigData();
+        LD2402Serial->setReadChunkMode(0);
+      } else {
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Head %*_H"), 4, header.buffer);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Cmd %*_H"), length, LD2402.buffer);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "byte_counter: %d, avail: %d, got %d, length %d"), byte_counter, avail, got, length);
+        DEBUG_SENSOR_LOG(PSTR(D_LD2402_LOG_PREFIX "Foot %*_H"), 4, footer.buffer);
+      }
+    }
+    data_type = 0;
+    byte_counter = 0;
+    break;
+  }
+  // If here then LD2402.byte_counter could still be partial correct for next loop
+}
+
+void Ld2402SendCommand(uint8_t command, uint32_t val_len = 0);
+void Ld2402SendCommand(uint8_t command, uint32_t val_len) {
+  uint8_t buffer[20] = LD2402_config_header_a;
+
+  buffer[4] = val_len + 2;
+  buffer[6] = command;
+  if (val_len) {
+    memcpy(buffer+8,LD2402.cmnd_param,val_len);
+  }
+  memcpy(buffer+8+val_len, LD2402_config_footer_a, sizeof(LD2402_config_footer_a));
+
+  LD2402.sent_ack = command;
+  LD2402Serial->setReadChunkMode(1);                            // Enable chunk mode introducing possible Hardware Watchdogs
+  LD2402Serial->flush();
+  LD2402Serial->write(buffer, val_len + 12);
+}
+
+void Ld2402LoadLastParam(uint32_t curr_param) {
+  memset(LD2402.cmnd_param, 0x00, 6);
+  LD2402.cmnd_param[0] = curr_param;
+  switch (curr_param) {
+  case LD2402_CMND_PARAM_MAX_DISTANCE:
+    LD2402.cmnd_param[2] = LD2402.max_distance;
+    break;
+  
+  case LD2402_CMND_PARAM_DISP_DELAY:
+    LD2402.cmnd_param[2] = LD2402.disp_delay & 0x00FF;
+    LD2402.cmnd_param[3] = LD2402.disp_delay >> 8;
+    break;
+  
+  default:
+    switch (curr_param & 0xF0) {
+    case LD2402_CMND_PARAM_MOTION_START:
+      memcpy(LD2402.cmnd_param + 2, LD2402.motion_threshold + (curr_param & 0x0F) * 4, 4);
+      break;
+    
+    case LD2402_CMND_PARAM_MICRO_START:
+      memcpy(LD2402.cmnd_param + 2, LD2402.micro_threshold + (curr_param & 0x0F) * 4, 4);
+      break;
+    
+    default:
+      break;
+    }
+    break;
+  }
+}
+
+void Ld2402WriteThresholds(uint8_t *thresholds, uint32_t cmnd_param) {
+  if (LD2402.busy) {
+    Response_P(PSTR(D_BUSY_MSG));
+    return;
+  }
+  if (ArgC() != 16) {
+    Response_P(PSTR("Use LS2410S_Set{Motion/Micro} 1,2,..16 (values are dB <= 95.00"));
+    return;
+  }
+  char strbuf[24];
+  float param;
+  uint32_t i = 0;
+  for (uint32_t j = 0; j < LD2402_NUM_GATES; j++) {
+    ArgV(strbuf, j+1);
+    param = CharToFloat(strbuf);
+    uint32_t val = exp10(param > 95.00f ? 95.00f : param);
+    thresholds[i++] = val & 0x000000FF;
+    thresholds[i++] = val >> 8 & 0x000000FF;
+    thresholds[i++] = val >> 16 & 0x000000FF;
+    thresholds[i++] = val >> 24;
+  }
+  Ld2402LoadLastParam(cmnd_param);
+  Ld2402ExecConfigCmnd(LD2402_CMND_WRITE_PARAM);
+  Response_P(PSTR("Accepted... Allow 2 seconds to write to device."));
+}
+
+void Ld2402ResponseAppendGates(uint8_t *energies) {
+  const float multiplier = 10.0f / 2.302585f;
+  uint32_t i = 0;
+  float val;
+  while (i < LD2402_NUM_GATES * 4) {
+    val = energies[i++] | energies[i++] << 8 | energies[i++] << 16 | energies[i++] << 24;
+    val = (val ? multiplier * logf(val) : 0);
+    if (4 != i) { ResponseAppend_P(PSTR(",")); }
+    ResponseAppend_P(PSTR("%2_f"), &val);
+  }
+}
+
+void Ld2402ResponseAppendReport() {
+  if (3 == LD2402.report_type) {
+    ResponseAppend_P(PSTR("\"AutoUpdate\":\"%1d%%\"}"), LD2402.auto_upd_progress);
+  } else if (0 == LD2402.report_type) {
+    ResponseAppend_P(PSTR("\"Error\":\"Disconnected\"}"));
+  } else {
+    ResponseAppend_P(PSTR("\"" D_JSON_DISTANCE "\":%d"), LD2402.detect_distance);
+    if (1 == LD2402.report_type) {
+      ResponseAppend_P(PSTR(",\"Motion\":%s"), (1 == LD2402.person ? "true" : "false"));
+      ResponseAppend_P(PSTR(",\"Occupancy\":%s"), (LD2402.person ? "true" : "false"));
+      ResponseAppend_P(PSTR(",\"PowerInterference\":%d"), LD2402.pwr_interf);
+      if (2 == LD2402.pwr_interf) { ResponseAppend_P(PSTR(",\"InterferenceGates\":\"%s\""), LD2402.gates); }
+      ResponseAppend_P(PSTR(",\"MotionEnergies\":["));
+      Ld2402ResponseAppendGates(LD2402.motion_energy);
+      ResponseAppend_P(PSTR("],\"MicroEnergies\":["));
+      Ld2402ResponseAppendGates(LD2402.micro_energy);
+      ResponseAppend_P(PSTR("]}"));
+    }
+  }
+}
+void Ld2402ExecQuickCmnd(uint32_t cmnd) {
+  LD2402.busy = true;
+  LD2402.step = cmnd;
+}
+
+void Ld2402ExecConfigCmnd(uint32_t cmnd) {
+  LD2402.next_step = cmnd;
+  Ld2402ExecQuickCmnd(LD2402_CMND_START_CONFIGURATION);
+}
+
+void Ld2402DeviceDisconnected(void) {
+  AddLog(LOG_LEVEL_INFO, PSTR(D_LD2402_LOG_PREFIX "Device disconnected"));
+  LD2402.step = CMD_LD2402_Done;
+  LD2402.report_type = 0;
+}
+
+/********************************************************************************************/
+
+void Ld2402OnDemand(uint32_t ack_rcvd) {
+  switch (ack_rcvd) {
+  case LD2402_CMND_START_CONFIGURATION>>4:
+    LD2402.step = LD2402.next_step;
+    break;
+
+  case LD2402_CMND_END_CONFIGURATION>>4:
+    LD2402.step = CMD_LD2402_Done;
+    return;
+  
+  case LD2402_CMND_SAVE_PARAM>>4:
+    return;
+
+  case LD2402_CMND_AUTO_THRESHOLD>>4:
+    LD2402.step = LD2402_CMND_AUTO_PROGRESS;
+    return;
+
+  case LD2402_CMND_AUTO_PROGRESS>>4:
+    if (100 > LD2402.auto_upd_progress) {
+      LD2402.step = LD2402_CMND_AUTO_PROGRESS;
+      return;
+    }
+    LD2402.step = LD2402_CMND_READ_PARAM;
+    break;
+
+  case LD2402_CMND_AUTO_INTERFERENCE>>4:
+    LD2402.step = LD2402_CMND_READ_PARAM;
+    break;
+
+  case LD2402_CMND_MODE>>4:
+    LD2402.step = LD2402_CMND_END_CONFIGURATION;
+    return;
+
+  case LD2402_CMND_READ_VERSION>>4:
+    LD2402.step = LD2402_CMND_READ_SERIAL;
+    break;
+
+  case LD2402_CMND_READ_SERIAL>>4:
+    if (!LD2402.initializing) {
+      LD2402.step = LD2402_CMND_END_CONFIGURATION;
+      return;
+    }
+    LD2402.cmnd_param[0] = LD2402_CMND_PARAM_MAX_DISTANCE;
+    LD2402.next_step = LD2402_CMND_READ_PARAM;
+    LD2402.step = LD2402_CMND_START_CONFIGURATION;
+    break;
+
+  case LD2402_CMND_WRITE_PARAM>>4:
+    switch (LD2402.cmnd_param[0]) {
+    case LD2402_CMND_PARAM_MAX_DISTANCE:
+      Ld2402LoadLastParam(LD2402_CMND_PARAM_DISP_DELAY);
+      LD2402.step = LD2402_CMND_WRITE_PARAM;
+      break;
+
+    case LD2402_CMND_PARAM_DISP_DELAY:
+    case LD2402_CMND_PARAM_MOTION_END:
+    case LD2402_CMND_PARAM_MICRO_END:
+      LD2402.step = LD2402_CMND_END_CONFIGURATION;
+      return;
+
+    default:
+      switch (LD2402.cmnd_param[0] & 0xF0) {
+      // gate specific params
+      case LD2402_CMND_PARAM_MICRO_START:
+      case LD2402_CMND_PARAM_MOTION_START:
+        Ld2402LoadLastParam(++LD2402.cmnd_param[0]);
+        LD2402.step = LD2402_CMND_WRITE_PARAM;
+        break;
+      default:
+        LD2402.step = LD2402_CMND_END_CONFIGURATION;
+        return;
+      }
+    }
+    break;
+
+  case LD2402_CMND_READ_PARAM>>4:
+    switch (LD2402.cmnd_param[0]) {
+    case LD2402_CMND_PARAM_MAX_DISTANCE:
+      LD2402.cmnd_param[0] = LD2402_CMND_PARAM_DISP_DELAY;
+      break;
+    
+    case LD2402_CMND_PARAM_DISP_DELAY:
+      LD2402.cmnd_param[0] = LD2402_CMND_PARAM_PWR_INTERFER;
+      break;
+    
+    case LD2402_CMND_PARAM_PWR_INTERFER:
+      LD2402.cmnd_param[0] = LD2402_CMND_PARAM_MOTION_START;
+      if (2 == LD2402.pwr_interf) {
+        LD2402.step = LD2402_CMND_AUTO_INTERFERENCE;
+      }
+      break;
+    
+    case LD2402_CMND_PARAM_MOTION_END:
+      LD2402.cmnd_param[0] = LD2402_CMND_PARAM_MICRO_START;
+      break;
+    
+    case LD2402_CMND_PARAM_MICRO_END:
+      if (LD2402.initializing) {
+        // clear LD2402_CMND_READ_PARAM param
+        LD2402.cmnd_param[0] = 0x00;
+        LD2402.cmnd_param[2] = 0x04;
+        LD2402.step = LD2402_CMND_MODE;
+        Ld2402EveryXMSecond();
+      } else {
+        LD2402.step = LD2402_CMND_END_CONFIGURATION;
+      }
+      return;
+    
+    default:
+      switch (LD2402.cmnd_param[0] & 0xF0) {
+      // gate specific params
+      case LD2402_CMND_PARAM_MOTION_START:
+      case LD2402_CMND_PARAM_MICRO_START:
+        LD2402.cmnd_param[0]++;
+        break;
+      default:
+        LD2402.step = LD2402_CMND_END_CONFIGURATION;
+        return;
+      }
+      break;
+    }
+    LD2402.step = LD2402_CMND_READ_PARAM;
+    break;
+
+  default:
+    return;
+  }
+  Ld2402EveryXMSecond();
+}
+
+void Ld2402EveryXMSecond(void) {
+  if (LD2402.step) {
+    uint32_t command = LD2402.step>>4;
+    switch (LD2402.step--) {
+    // special: get control of LD2402
+    case LD2402_CMND_READ_PARAM:
+      Ld2402SendCommand(command, 2);
+      break;
+
+    case LD2402_CMND_START_CONFIGURATION:
+      LD2402.cmnd_param[0] = 0x01;
+      Ld2402SendCommand(command, 2);
+      if (LD2402.initializing) {
+        LD2402.step = LD2402_CMND_START_CONFIGURATION+CMD_LD2402_BOOT_DELAY;
+        return;
+      }
+      break;
+    
+    case LD2402_CMND_AUTO_PROGRESS-CMD_LD2402_PROGRESS_DELAY:
+    case LD2402_CMND_AUTO_INTERFERENCE:
+    case LD2402_CMND_READ_VERSION:
+    case LD2402_CMND_READ_SERIAL:
+    case LD2402_CMND_SAVE_PARAM:
+    case LD2402_CMND_END_CONFIGURATION-CMD_LD2402_END_DELAY:
+      Ld2402SendCommand(command);
+      break;
+    
+    case LD2402_CMND_AUTO_THRESHOLD:
+    case LD2402_CMND_WRITE_PARAM:
+    case LD2402_CMND_MODE:
+      Ld2402SendCommand(command, 6);
+      break;
+
+    case CMD_LD2402_Wait_Timeout-CMD_LD2402_TIMEOUT_DELAY:
+      Ld2402DeviceDisconnected();
+      return;
+
+    case CMD_LD2402_Done:
+      LD2402.busy = 0;
+      LD2402.initializing = 0;
+      return;
+
+    default:
+      return;
+    }
+    LD2402.step = CMD_LD2402_Wait_Timeout;
+  }
+}
+
+void Ld2402EverySecond(void) {
+  static uint32_t person = 4;
+  if (!LD2402.report_type && !LD2402.initializing) {
+    AddLog(LOG_LEVEL_INFO, PSTR(D_LD2402_LOG_PREFIX "Trying to reconnect."));
+    Ld2402ExecQuickCmnd(LD2402_CMND_READ_VERSION);
+    return;
+  }
+
+  if (!LD2402.timer && (LD2402.person == person)) { return; }
+  if (LD2402.timer) { --LD2402.timer; }
+  if (LD2402.timer && (LD2402.person == person)) { return; }
+  if (LD2402.person != person) { person = LD2402.person; }
+  if (!LD2402.timer) { LD2402.timer = LD2402.follow; }
+
+  MqttPublishSensor();
+}
+
+void Ld2402Detect(void) {
+  if (PinUsed(GPIO_LD2402_RX) && PinUsed(GPIO_LD2402_TX)) {
+    LD2402.buffer = (uint8_t*)malloc(LD2402_BUFFER_SIZE);
+    AddLog(LOG_LEVEL_DEBUG, PSTR(D_LD2402_LOG_PREFIX "Buff size %d"), LD2402_BUFFER_SIZE);
+    if (!LD2402.buffer) { AddLog(LOG_LEVEL_DEBUG, PSTR(D_LD2402_LOG_PREFIX "No buff")); return; }
+    LD2402Serial = new TasmotaSerial(Pin(GPIO_LD2402_RX), Pin(GPIO_LD2402_TX), 2, 0, LD2402_BUFFER_SIZE);
+    if (LD2402Serial->begin(115200)) {
+      if (LD2402Serial->hardwareSerial()) { ClaimSerial(); }
+#ifdef ESP32
+      AddLog(LOG_LEVEL_DEBUG, PSTR(D_LD2402_LOG_PREFIX "Serial UART%d"), LD2402Serial->getUart());
+#endif
+    volatile uint32_t i=0x01234567;
+    LD2402.is_big = (*((uint8_t*)(&i))) != 0x67;
+    if (!LD2402.busy) {
+        AddLog(LOG_LEVEL_DEBUG, PSTR(D_LD2402_LOG_PREFIX "Starting initialization."));
+        LD2402.initializing = true;
+        LD2402.step = LD2402_CMND_START_CONFIGURATION+CMD_LD2402_BOOT_DELAY;
+        LD2402.next_step = LD2402_CMND_READ_VERSION;
+      }
+    }
+  }
+}
+
+/*********************************************************************************************\
+ * Commands
+\*********************************************************************************************/
+
+#define D_CMD_MODE                  "Mode"
+#define D_CMD_AUTOUPDATE            "AutoUpdate"
+#define D_CMD_STATUS                "Status"
+#define D_CMD_SETCOMMON             "SetCommon"
+#define D_CMD_SETMOTION             "SetMotion"
+#define D_CMD_SETMICRO              "SetMicro"
+#define D_CMD_HELP                  "Help"
+#define D_CMD_REREAD                "ReRead"
+#define D_CMD_FOLLOW                "Follow"
+
+const char kLd2402Commands[] PROGMEM = D_LD2402 "_|"  // Prefix
+  D_CMD_MODE "|" D_CMD_AUTOUPDATE "|" D_CMD_STATUS "|" D_CMD_SETCOMMON "|"
+  D_CMD_SETMOTION "|" D_CMD_SETMICRO "|" D_CMD_HELP "|" D_CMD_REREAD "|"
+  D_CMD_FOLLOW;
+
+void (* const Ld2402Command[])(void) PROGMEM = {
+  &CmndLd2402Mode, &CmndLd2402AutoUpdate, &CmndLd2402Status, &CmndLd2402Common,
+  &CmndLd2402Motion, &CmndLd2402Micro, &CmndLd2402Help, &CmndLd2402ReRead,
+  &CmndLd2402Follow };
+
+void CmndLd2402Help(void) {
+  Response_P(PSTR(D_COMMAND_PREFIX_JSON"\"%s"), D_CMD_HELP, "Available commands: ");
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_MODE", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_AUTOUPDATE", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_STATUS", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_SETCOMMON", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_SETMOTION", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_SETMICRO", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_HELP", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_REREAD", "));
+  ResponseAppend_P(PSTR(D_LD2402 "_" D_CMD_FOLLOW"\"}"));
+}
+
+void CmndLd2402Follow(void) {
+  if (ArgC() != 1) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_FOLLOW, "Args: 0|n (MQTT update normal|MQTT update every n second(s))");
+    return;
+  }
+  char Argument[XdrvMailbox.data_len];
+  ArgV(Argument,1);
+  LD2402.timer = atoi(Argument);
+  LD2402.follow = LD2402.timer;
+  Response_P(PSTR(D_COMMAND_PREFIX_JSON"%d}"), D_CMD_FOLLOW, LD2402.follow);
+}
+
+void CmndLd2402Status(void) {
+  if (ArgC() != 1) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_STATUS, "Args: 0|1|2 (parameters|sensor|firmware)");
+    return;
+  }
+  uint32_t status_type = 0;
+  if (ArgC() == 1) {
+    char Argument[XdrvMailbox.data_len];
+    ArgV(Argument,1);
+    status_type = atoi(Argument);
+  }
+  
+  Response_P(PSTR("{\"" D_LD2402));
+  if (1 == status_type) {
+    ResponseAppend_P(PSTR("SNS\":{"));
+    Ld2402ResponseAppendReport();
+  } else if (2 == status_type) {
+    ResponseAppend_P(PSTR("FWR\":{\"Version\":\"%s\","),LD2402.version);  
+    ResponseAppend_P(PSTR("\"SerialNumber\":\"%s\"}}"),LD2402.serial_number);  
+  } else {
+    ResponseAppend_P(PSTR("\":{\"MaximumDistance\":%d,"), LD2402.max_distance);
+    ResponseAppend_P(PSTR("\"DisappearenceDelay\":%d,"), LD2402.disp_delay);
+    ResponseAppend_P(PSTR("\"MotionThresholds\":["));
+    Ld2402ResponseAppendGates(LD2402.motion_threshold);
+    Ld2402ResponseAppendGates(LD2402.micro_threshold);
+    ResponseAppend_P(PSTR("]}}"));
+  }
+}
+
+void CmndLd2402ReRead(void) {
+  if (LD2402.busy) {
+    Response_P(PSTR(D_BUSY_MSG));
+    return;
+  }
+  if (ArgC()) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_REREAD, "No Args: Retrieves common and threshold data from device");
+    return;
+  }
+  LD2402.cmnd_param[0] = LD2402_CMND_PARAM_MAX_DISTANCE;
+  Ld2402ExecConfigCmnd(LD2402_CMND_READ_PARAM);
+  Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_REREAD, "Retrieving ... wait six seconds for it to complete");
+}
+
+void CmndLd2402Common(void) {
+  if (LD2402.busy) {
+    Response_P(PSTR(D_BUSY_MSG));
+    return;
+  }
+  if (ArgC() != 2) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_SETCOMMON, "Args: MaximumDistance,DisappearanceDelay (decimeter,seconds)");
+    return;
+  }
+  uint32_t param[2] = { 0 };
+  ParseParameters(2, param);
+  if (param[0]>100) {param[0] = 100;}
+  if (param[0]<7) {param[0] = 7;}
+  if (param[1]<0) {param[1] = 0;}
+  if (param[1]>65535) {param[1] = 65535;}
+  LD2402.max_distance = param[0];
+  LD2402.disp_delay = param[1];
+  Ld2402LoadLastParam(LD2402_CMND_PARAM_MAX_DISTANCE);
+  Ld2402ExecConfigCmnd(LD2402_CMND_WRITE_PARAM);
+  CmndLd2402Status();
+}
+
+void CmndLd2402Mode(void) {
+  if (LD2402.busy) {
+    Response_P(PSTR(D_BUSY_MSG));
+    return;
+  }
+  if (ArgC() != 1) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_MODE, "Args: 0|1 (normal|engineering)");
+    return;
+  }
+  char Argument[XdrvMailbox.data_len];
+  ArgV(Argument,1);
+  memset(LD2402.cmnd_param, 0x00, 6);
+  LD2402.cmnd_param[2] = atoi(Argument) ? 0x04 : 0x64;
+  Response_P(PSTR(D_COMMAND_PREFIX_JSON"%d}"), D_CMD_FOLLOW, (0x04 == LD2402.cmnd_param[2]));
+  Ld2402ExecConfigCmnd(LD2402_CMND_MODE);
+}
+
+void CmndLd2402AutoUpdate(void) {
+  if (LD2402.busy) {
+    Response_P(PSTR(D_BUSY_MSG));
+    return;
+  }
+  if (ArgC() != 3) {
+    Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_AUTOUPDATE, "Args: trigger,keep,micro (magnification factor, 1.0 to 20.0)");
+    return;
+  }
+
+  char strbuf[24];
+  for (uint32_t i = 3; i; i--) {
+    ArgV(strbuf, i);
+    float param = CharToFloat(strbuf);
+    LD2402.cmnd_param[(i-1)*2] = (param < 1.0f) ? 10.0f : (param > 20.0f ? 200.0f : param * 10.0f);
+  }
+  Ld2402ExecConfigCmnd(LD2402_CMND_AUTO_THRESHOLD);
+  Response_P(PSTR(D_COMMAND_HELP_MSG), D_CMD_REREAD, "Updating ...");
+}
+
+void CmndLd2402Motion(void) {
+  Ld2402WriteThresholds(LD2402.motion_threshold, LD2402_CMND_PARAM_MOTION_START);
+}
+
+void CmndLd2402Micro(void) {
+  Ld2402WriteThresholds(LD2402.micro_threshold, LD2402_CMND_PARAM_MICRO_START);
+}
+
+/*********************************************************************************************\
+ * Presentation
+\*********************************************************************************************/
+
+#ifdef USE_WEBSERVER
+const char HTTP_SNS_LD2402_DIS[] PROGMEM =
+  "{s}" D_LD2402 " " D_DISCONNECTED "{e}";
+const char HTTP_SNS_LD2402_CM[] PROGMEM =
+  "{s}" D_LD2402 " " D_DISTANCE "{m}%d " D_UNIT_CENTIMETER "{e}";
+const char HTTP_SNS_LD2402_MV[] PROGMEM =
+  "{s}" D_LD2402 " " D_DISTANCE " (!){m}%d " D_UNIT_CENTIMETER "{e}";
+const char HTTP_SNS_LD2402_UPD[] PROGMEM =
+  "{s}" D_LD2402 " " D_AUTO_UPDATE "{m}%d " D_UNIT_PERCENT "{e}";
+
+void Ld2402Web(void) {
+  if (3 == LD2402.report_type) {
+    WSContentSend_PD(HTTP_SNS_LD2402_UPD, LD2402.auto_upd_progress);
+  } else if (2 == LD2402.report_type) {
+    WSContentSend_PD(HTTP_SNS_LD2402_CM, LD2402.detect_distance);
+  } else if (1 == LD2402.report_type) {
+    WSContentSend_PD((1 == LD2402.person ? HTTP_SNS_LD2402_MV : HTTP_SNS_LD2402_CM), LD2402.detect_distance);
+  } else {
+    WSContentSend_PD(HTTP_SNS_LD2402_DIS);
+  }
+}
+#endif
+
+void Ld2402Show(void) {
+  ResponseAppend_P(PSTR(",\"" D_LD2402 "\":{"));
+  Ld2402ResponseAppendReport();
+}
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+bool Xsns102(uint32_t function) {
+  bool result = false;
+
+  if (FUNC_INIT == function) {
+    Ld2402Detect();
+  }
+  else if (LD2402Serial) {
+    switch (function) {
+      case FUNC_LOOP:
+      case FUNC_SLEEP_LOOP:
+        Ld2402Input();
+        break;
+      case FUNC_EVERY_50_MSECOND:
+        Ld2402EveryXMSecond();
+      break;
+      case FUNC_EVERY_100_MSECOND:
+        break;
+      case FUNC_EVERY_SECOND:
+        Ld2402EverySecond();
+        break;
+      case FUNC_JSON_APPEND:
+        Ld2402Show();
+        break;
+#ifdef USE_WEBSERVER
+      case FUNC_WEB_SENSOR:
+        Ld2402Web();
+        break;
+#endif  // USE_WEBSERVER
+      case FUNC_COMMAND:
+        result = DecodeCommand(kLd2402Commands, Ld2402Command);
+        break;
+    }
+  }
+  return result;
+}
+
+#endif  // USE_LD2402