diff --git a/sonoff/my_user_config.h b/sonoff/my_user_config.h
index b58e49f60..33ba9327e 100644
--- a/sonoff/my_user_config.h
+++ b/sonoff/my_user_config.h
@@ -420,6 +420,7 @@
 //  #define USE_PN532_DATA_FUNCTION                // Add sensor40 command support for erase, setting data block content (+1k7 code, 388 bytes mem)
 //  #define USE_PN532_DATA_RAW                     // Allow DATA block to be used by non-alpha-numberic data (+ 80 bytes code, 48 bytes ram)
 //#define USE_RDM6300                              // Add support for RDM6300 125kHz RFID Reader (+0k8)
+#define USE_IBEACON                                // Add support for bluetooth LE passive scan of ibeacon devices (uses HM17 module)  
 
 // Power monitoring sensors -----------------------
 #define USE_ENERGY_MARGIN_DETECTION              // Add support for Energy Margin detection (+1k6 code)
diff --git a/sonoff/sonoff_template.h b/sonoff/sonoff_template.h
index 41b97eb40..2d763cb47 100644
--- a/sonoff/sonoff_template.h
+++ b/sonoff/sonoff_template.h
@@ -192,6 +192,8 @@ enum UserSelectablePins {
   GPIO_ZIGBEE_TX,      // Zigbee Serial interface
   GPIO_ZIGBEE_RX,      // Zigbee Serial interface
   GPIO_RDM6300_RX,     // RDM6300 RX
+  GPIO_IBEACON_TX,     // HM17 IBEACON TX
+  GPIO_IBEACON_RX,     // HM17 IBEACON RX
   GPIO_SENSOR_END };
 
 // Programmer selectable GPIO functionality
@@ -264,6 +266,7 @@ const char kSensorNames[] PROGMEM =
   D_SENSOR_SOLAXX1_TX "|" D_SENSOR_SOLAXX1_RX "|"
   D_SENSOR_ZIGBEE_TXD "|" D_SENSOR_ZIGBEE_RXD "|"
   D_SENSOR_RDM6300_RX "|"
+  D_SENSOR_IBEACON_TX "|" D_SENSOR_IBEACON_RX "|"
   ;
 
 // User selectable ADC0 functionality
@@ -667,6 +670,10 @@ const uint8_t kGpioNiceList[] PROGMEM = {
   GPIO_SOLAXX1_TX,     // Solax Inverter tx pin
   GPIO_SOLAXX1_RX,     // Solax Inverter rx pin
 #endif
+#ifdef USE_IBEACON
+  GPIO_IBEACON_RX,
+  GPIO_IBEACON_TX,
+#endif
 };
 
 const uint8_t kModuleNiceList[] PROGMEM = {
diff --git a/sonoff/xsns_52_ibeacon.ino b/sonoff/xsns_52_ibeacon.ino
new file mode 100644
index 000000000..89638a237
--- /dev/null
+++ b/sonoff/xsns_52_ibeacon.ino
@@ -0,0 +1,591 @@
+/*
+  xsns_52_ibeacon.ino - Support for HM17 BLE Module + ibeacon reader
+
+  Copyright (C) 2019  Gerhard Mutz 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_IBEACON
+
+
+
+#define XSNS_52                       52
+
+#include <TasmotaSerial.h>
+
+#define HM17_BAUDRATE 9600
+
+//#define IBEACON_DEBUG
+
+// keyfob expires after N seconds
+#define IB_TIMEOUT_INTERVAL 30
+// does a passive scan every N seconds
+#define IB_UPDATE_TIME_INTERVAL 10
+
+TasmotaSerial *IBEACON_Serial = nullptr;
+
+
+uint8_t hm17_found,hm17_cmd,hm17_flag;
+
+#ifdef IBEACON_DEBUG
+uint8_t hm17_debug=0;
+#endif
+
+
+// 78 is max serial response
+#define HM17_BSIZ 128
+char hm17_sbuffer[HM17_BSIZ];
+uint8_t hm17_sindex,hm17_result,hm17_scanning,hm17_connecting;
+uint32_t hm17_lastms;
+char ib_mac[14];
+
+// should be in Settings
+#if 1
+uint8_t ib_upd_interval,ib_tout_interval;
+#define IB_UPDATE_TIME ib_upd_interval
+#define IB_TIMEOUT_TIME ib_tout_interval
+#else
+#undef IB_UPDATE_TIME
+#undef IB_TIMEOUT_TIME
+#define IB_UPDATE_TIME Settings.ib_upd_interval
+#define IB_TIMEOUT_TIME Settings.ib_tout_interval
+#endif
+
+enum {HM17_TEST,HM17_ROLE,HM17_IMME,HM17_DISI,HM17_IBEA,HM17_SCAN,HM17_DISC,HM17_RESET,HM17_RENEW,HM17_CON};
+#define HM17_SUCESS 99
+
+struct IBEACON {
+  char FACID[8];
+  char UID[32];
+  char MAJOR[4];
+  char MINOR[4];
+  char PWR[2];
+  char MAC[12];
+  char RSSI[4];
+};
+
+#define MAX_IBEACONS 16
+
+struct IBEACON_UID {
+  char MAC[12];
+  char RSSI[4];
+  uint8_t FLAGS;
+  uint8_t TIME;
+} ibeacons[MAX_IBEACONS];
+
+
+void IBEACON_Init() {
+
+  hm17_found=0;
+
+// actually doesnt work reliably with software serial
+  if ((pin[GPIO_IBEACON_RX] < 99) && (pin[GPIO_IBEACON_TX] < 99)) {
+    IBEACON_Serial = new TasmotaSerial(pin[GPIO_IBEACON_RX], pin[GPIO_IBEACON_TX],1);
+    if (IBEACON_Serial->begin(HM17_BAUDRATE)) {
+      if (IBEACON_Serial->hardwareSerial()) {
+        ClaimSerial();
+      }
+      hm17_sendcmd(HM17_TEST);
+      hm17_lastms=millis();
+      // in case of using Settings this has to be moved
+      IB_UPDATE_TIME=IB_UPDATE_TIME_INTERVAL;
+      IB_TIMEOUT_TIME=IB_TIMEOUT_INTERVAL;
+    }
+  }
+}
+
+void hm17_every_second(void) {
+  if (!IBEACON_Serial) return;
+
+  if (hm17_found) {
+    if (IB_UPDATE_TIME && (uptime%IB_UPDATE_TIME==0)) {
+      if (hm17_cmd!=99) {
+        if (hm17_flag&2) {
+          ib_sendbeep();
+        } else {
+          if (!hm17_connecting) {
+            hm17_sendcmd(HM17_DISI);
+          }
+        }
+      }
+    }
+    for (uint32_t cnt=0;cnt<MAX_IBEACONS;cnt++) {
+      if (ibeacons[cnt].FLAGS) {
+        ibeacons[cnt].TIME++;
+        if (ibeacons[cnt].TIME>IB_TIMEOUT_TIME) {
+          ibeacons[cnt].FLAGS=0;
+          ibeacon_mqtt(ibeacons[cnt].MAC,"0000");
+        }
+      }
+    }
+  } else {
+    if (uptime%20==0) {
+      hm17_sendcmd(HM17_TEST);
+    }
+  }
+}
+
+void hm17_sbclr(void) {
+  memset(hm17_sbuffer,0,HM17_BSIZ);
+  hm17_sindex=0;
+  IBEACON_Serial->flush();
+}
+
+void hm17_sendcmd(uint8_t cmd) {
+  hm17_sbclr();
+  hm17_cmd=cmd;
+#ifdef IBEACON_DEBUG
+  if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("hm17cmd %d"),cmd);
+#endif
+  switch (cmd) {
+    case HM17_TEST:
+      IBEACON_Serial->write("AT");
+      break;
+    case HM17_ROLE:
+      IBEACON_Serial->write("AT+ROLE1");
+      break;
+    case HM17_IMME:
+      IBEACON_Serial->write("AT+IMME1");
+      break;
+    case HM17_DISI:
+      IBEACON_Serial->write("AT+DISI?");
+      hm17_scanning=1;
+      break;
+    case HM17_IBEA:
+      IBEACON_Serial->write("AT+IBEA1");
+      break;
+    case HM17_RESET:
+      IBEACON_Serial->write("AT+RESET");
+      break;
+    case HM17_RENEW:
+      IBEACON_Serial->write("AT+RENEW");
+      break;
+    case HM17_SCAN:
+      IBEACON_Serial->write("AT+SCAN5");
+      break;
+    case HM17_DISC:
+      IBEACON_Serial->write("AT+DISC?");
+      hm17_scanning=1;
+      break;
+    case HM17_CON:
+      IBEACON_Serial->write((const uint8_t*)"AT+CON",6);
+      IBEACON_Serial->write((const uint8_t*)ib_mac,12);
+      hm17_connecting=1;
+      break;
+  }
+}
+
+uint32_t ibeacon_add(struct IBEACON *ib) {
+  // keyfob starts with ffff, ibeacon has valid facid
+  if (!strncmp(ib->MAC,"FFFF",4) || strncmp(ib->FACID,"00000000",8)) {
+    for (uint32_t cnt=0;cnt<MAX_IBEACONS;cnt++) {
+      if (ibeacons[cnt].FLAGS) {
+        if (!strncmp(ibeacons[cnt].MAC,ib->MAC,12)) {
+          // exists
+          memcpy(ibeacons[cnt].RSSI,ib->RSSI,4);
+          ibeacons[cnt].TIME=0;
+          return 1;
+        }
+      }
+    }
+    for (uint32_t cnt=0;cnt<MAX_IBEACONS;cnt++) {
+      if (!ibeacons[cnt].FLAGS) {
+        memcpy(ibeacons[cnt].MAC,ib->MAC,12);
+        memcpy(ibeacons[cnt].RSSI,ib->RSSI,4);
+        ibeacons[cnt].FLAGS=1;
+        ibeacons[cnt].TIME=0;
+        return 1;
+      }
+    }
+  }
+  return 0;
+}
+
+void hm17_decode(void) {
+  struct IBEACON ib;
+  switch (hm17_cmd) {
+    case HM17_TEST:
+      if (!strncmp(hm17_sbuffer,"OK",2)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("AT OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+        hm17_found=1;
+      }
+      break;
+    case HM17_ROLE:
+      if (!strncmp(hm17_sbuffer,"OK+Set:1",8)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("ROLE OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+      }
+      break;
+    case HM17_IMME:
+      if (!strncmp(hm17_sbuffer,"OK+Set:1",8)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("IMME OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+      }
+      break;
+    case HM17_IBEA:
+      if (!strncmp(hm17_sbuffer,"OK+Set:1",8)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("IBEA OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+      }
+      break;
+    case HM17_SCAN:
+        if (!strncmp(hm17_sbuffer,"OK+Set:5",8)) {
+#ifdef IBEACON_DEBUG
+          if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("SCAN OK"));
+#endif
+          hm17_sbclr();
+          hm17_result=HM17_SUCESS;
+        }
+        break;
+    case HM17_RESET:
+      if (!strncmp(hm17_sbuffer,"OK+RESET",8)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("RESET OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+      }
+      break;
+    case HM17_RENEW:
+      if (!strncmp(hm17_sbuffer,"OK+RENEW",8)) {
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("RENEW OK"));
+#endif
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+      }
+      break;
+    case HM17_CON:
+      if (!strncmp(hm17_sbuffer,"OK+CONNA",8)) {
+        hm17_sbclr();
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("CONNA OK"));
+#endif
+        hm17_connecting=2;
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+CONNE",8)) {
+        hm17_sbclr();
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("CONNE ERROR"));
+#endif
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+CONNF",8)) {
+        hm17_sbclr();
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("CONNF ERROR"));
+#endif
+        break;
+      }
+      if (hm17_connecting==2 && !strncmp(hm17_sbuffer,"OK+CONN",7)) {
+        hm17_sbclr();
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("CONN OK"));
+#endif
+        hm17_connecting=3;
+        hm17_sendcmd(HM17_TEST);
+        hm17_connecting=0;
+        break;
+      }
+      break;
+
+    case HM17_DISI:
+    case HM17_DISC:
+      if (!strncmp(hm17_sbuffer,"OK+DISCS",8)) {
+        hm17_sbclr();
+        hm17_result=1;
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("DISCS OK"));
+#endif
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+DISCE",8)) {
+        hm17_sbclr();
+        hm17_result=HM17_SUCESS;
+#ifdef IBEACON_DEBUG
+        if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR("DISCE OK"));
+#endif
+        hm17_scanning=0;
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+NAME:",8)) {
+        if (hm17_sbuffer[hm17_sindex-1]=='\n') {
+          hm17_result=HM17_SUCESS;
+#ifdef IBEACON_DEBUG
+          if (hm17_debug) {
+            AddLog_P2(LOG_LEVEL_INFO, PSTR("NAME OK"));
+            AddLog_P2(LOG_LEVEL_INFO, PSTR(">>%s"),&hm17_sbuffer[8]);
+          }
+#endif
+          hm17_sbclr();
+        }
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+DIS0:",8)) {
+        if (hm17_sindex==20) {
+          hm17_result=HM17_SUCESS;
+#ifdef IBEACON_DEBUG
+          if (hm17_debug) {
+            AddLog_P2(LOG_LEVEL_INFO, PSTR("DIS0 OK"));
+            AddLog_P2(LOG_LEVEL_INFO, PSTR(">>%s"),&hm17_sbuffer[8]);
+          }
+#endif
+          hm17_sbclr();
+        }
+        break;
+      }
+      if (!strncmp(hm17_sbuffer,"OK+DISC:",8)) {
+        if (hm17_cmd==HM17_DISI) {
+          if (hm17_sindex==78) {
+#ifdef IBEACON_DEBUG
+            if (hm17_debug) {
+              AddLog_P2(LOG_LEVEL_INFO, PSTR("DISC: OK"));
+              //OK+DISC:4C 000C0E:003 A9144081A8 3B16849611 862EC1005: 0B1CE7485D :4DB4E940F C0E:-078
+              AddLog_P2(LOG_LEVEL_INFO, PSTR(">>%s"),&hm17_sbuffer[8]);
+            }
+#endif
+            memcpy(ib.FACID,&hm17_sbuffer[8],8);
+            memcpy(ib.UID,&hm17_sbuffer[8+8+1],32);
+            memcpy(ib.MAJOR,&hm17_sbuffer[8+8+1+32+1],4);
+            memcpy(ib.MINOR,&hm17_sbuffer[8+8+1+32+1+4],4);
+            memcpy(ib.PWR,&hm17_sbuffer[8+8+1+32+1+4+4],2);
+            memcpy(ib.MAC,&hm17_sbuffer[8+8+1+32+1+4+4+2+1],12);
+            memcpy(ib.RSSI,&hm17_sbuffer[8+8+1+32+1+4+4+2+1+12+1],4);
+
+            if (ibeacon_add(&ib)) {
+              ibeacon_mqtt(ib.MAC,ib.RSSI);
+            }
+            hm17_sbclr();
+            hm17_result=1;
+          }
+        } else {
+#ifdef IBEACON_DEBUG
+          if (hm17_debug) AddLog_P2(LOG_LEVEL_INFO, PSTR(">>%s"),&hm17_sbuffer[8]);
+#endif
+        }
+        break;
+      }
+  }
+}
+
+void IBEACON_loop() {
+
+  if (!IBEACON_Serial) return;
+
+uint32_t difftime=millis()-hm17_lastms;
+
+  while (IBEACON_Serial->available()) {
+    hm17_lastms=millis();
+    // shift in
+    if (hm17_sindex<HM17_BSIZ) {
+      hm17_sbuffer[hm17_sindex]=IBEACON_Serial->read();
+      hm17_sindex++;
+      hm17_decode();
+    } else {
+      hm17_sindex=0;
+      break;
+    }
+  }
+
+  if (hm17_cmd==99) {
+   if (hm17_sindex>=HM17_BSIZ-2 || (hm17_sindex && (difftime>100))) {
+     AddLog_P2(LOG_LEVEL_INFO, PSTR("%s"),hm17_sbuffer);
+     hm17_sbclr();
+   }
+  }
+
+}
+
+#ifdef USE_WEBSERVER
+const char HTTP_IBEACON[] PROGMEM =
+ "{s}IBEACON-UID : %s" " - RSSI : %s" "{m}{e}";
+
+void IBEACON_Show(void) {
+char mac[14];
+char rssi[6];
+
+  for (uint32_t cnt=0;cnt<MAX_IBEACONS;cnt++) {
+    if (ibeacons[cnt].FLAGS) {
+      memcpy(mac,ibeacons[cnt].MAC,12);
+      mac[12]=0;
+      memcpy(rssi,ibeacons[cnt].RSSI,4);
+      rssi[4]=0;
+      WSContentSend_PD(HTTP_IBEACON,mac,rssi);
+    }
+  }
+
+}
+#endif  // USE_WEBSERVER
+
+/*
+commands sensor52
+to initialyze hm17 the cmds
+sensor52 1
+sensor52 2
+must be given only once (stored in module)
+
+uT = sets update interval in seconds (scan tags every T seonds) default=10
+tT = sets timeout interval in seconds (after T seconds if tag is not detected send rssi=0) default=30
+sending IBEACON_FFFF3D1B1E9D_RSSI with data 99 causes tag to beep (ID to be replaced with actual ID)
+
+*** debugging
+dx = sets debug mode to 0,1 (shows hm17 cmds + reactions in console)
+c  = clears sensor list
+s AT+xxx  = send native cmds to module
+e.g. s AT+CONFFFF3D1B1E9D connects to module with ID, then send s AT to disconnect which activates the beeper in the TAG
+*/
+
+
+
+bool xsns52_cmd(void) {
+  bool serviced = true;
+  const char S_JSON_IBEACON[] = "{\"" D_CMND_SENSOR "%d\":%s:%d}";
+  const char S_JSON_IBEACON1[] = "{\"" D_CMND_SENSOR "%d\":%s:%s}";
+  uint16_t len=XdrvMailbox.data_len;
+  if (len > 0) {
+      char *cp=XdrvMailbox.data;
+      if (*cp>='0' && *cp<='8') {
+        hm17_sendcmd(*cp&7);
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON, XSNS_52,"hm17cmd",*cp&7);
+      } else if (*cp=='s') {
+        cp++;
+        len--;
+        while (*cp==' ') {
+          len--;
+          cp++;
+        }
+        IBEACON_Serial->write((uint8_t*)cp,len);
+        hm17_cmd=99;
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON1, XSNS_52,"hm17cmd",cp);
+      } else if (*cp=='u') {
+        cp++;
+        if (*cp) IB_UPDATE_TIME=atoi(cp);
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON, XSNS_52,"uintv",IB_UPDATE_TIME);
+      } else if (*cp=='t') {
+        cp++;
+        if (*cp) IB_TIMEOUT_TIME=atoi(cp);
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON, XSNS_52,"lintv",IB_TIMEOUT_TIME);
+      } else if (*cp=='c') {
+        for (uint32_t cnt=0;cnt<MAX_IBEACONS;cnt++) ibeacons[cnt].FLAGS=0;
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON1, XSNS_52,"clr list","");
+      }
+#ifdef IBEACON_DEBUG
+      else if (*cp=='d') {
+        cp++;
+        if (*cp) hm17_debug=atoi(cp);
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON, XSNS_52,"debug",hm17_debug);
+      }
+#endif
+  } else {
+    serviced=false;
+  }
+  return serviced;
+}
+
+#define D_CMND_IBEACON "IBEACON"
+//"IBEACON_FFFF3D1B1E9D_RSSI", Data "99" causes TAG to beep
+bool ibeacon_cmd(void) {
+  ib_mac[0]=0;
+  int16_t rssi=0;
+  const char S_JSON_IBEACON[] = "{\"" D_CMND_IBEACON "_%s_RSSI\":%d}";
+  uint8_t cmd_len = strlen(D_CMND_IBEACON);
+  if (!strncasecmp_P(XdrvMailbox.topic, PSTR(D_CMND_IBEACON), cmd_len)) {
+    // IBEACON prefix
+    rssi = XdrvMailbox.payload;
+    if (rssi==99) {
+      memcpy(ib_mac,XdrvMailbox.topic+cmd_len+1,12);
+      ib_mac[12]=0;
+      if (hm17_scanning) {
+        // postpone sendbeep
+        hm17_flag|=2;
+      } else {
+        ib_sendbeep();
+      }
+    }
+    snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_IBEACON,ib_mac,rssi);
+    return true;
+  }
+  return false;
+}
+
+void ib_sendbeep(void) {
+  hm17_flag=0;
+  hm17_sendcmd(HM17_CON);
+}
+
+void ibeacon_mqtt(const char *mac,const char *rssi) {
+  char s_mac[14];
+  char s_rssi[6];
+  memcpy(s_mac,mac,12);
+  s_mac[12]=0;
+  memcpy(s_rssi,rssi,4);
+  s_rssi[4]=0;
+  int16_t n_rssi=atoi(s_rssi);
+  ResponseBeginTime();
+  ResponseAppend_P(PSTR(",\"" D_CMND_IBEACON "_%s\":{\"RSSI\":%d}}"),s_mac,n_rssi);
+  MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR), Settings.flag.mqtt_sensor_retain);
+}
+
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+bool Xsns52(byte function)
+{
+  bool result = false;
+
+    switch (function) {
+      case FUNC_INIT:
+        IBEACON_Init();
+        break;
+      case FUNC_LOOP:
+        IBEACON_loop();
+        break;
+      case FUNC_EVERY_SECOND:
+        hm17_every_second();
+        break;
+      case FUNC_COMMAND_SENSOR:
+        if (XSNS_52 == XdrvMailbox.index) {
+          result = xsns52_cmd();
+        }
+        break;
+      case FUNC_COMMAND:
+        result=ibeacon_cmd();
+        break;
+#ifdef USE_WEBSERVER
+      case FUNC_WEB_SENSOR:
+        if (hm17_found) IBEACON_Show();
+        break;
+#endif  // USE_WEBSERVER
+    }
+    return result;
+}
+
+#endif  // USE_IBEACON