diff --git a/MqttTopics.h b/MqttTopics.h
index 7eac839..c608d7d 100644
--- a/MqttTopics.h
+++ b/MqttTopics.h
@@ -13,3 +13,5 @@
 #define mqtt_topic_lockstate_completionStatus "/lock/completionStatus"
 #define mqtt_topic_door_sensor_state "/lock/doorSensorState"
 #define mqtt_topic_lockstate_action "/lock/action"
+
+#define mqtt_topic_presence "/presence/devices"
diff --git a/Network.cpp b/Network.cpp
index 5f34fac..ef3db91 100644
--- a/Network.cpp
+++ b/Network.cpp
@@ -148,6 +148,12 @@ void Network::update()
         }
     }
 
+    if(_presenceCsv != nullptr)
+    {
+        publishString(mqtt_topic_presence, _presenceCsv);
+        _presenceCsv = nullptr;
+    }
+
     _mqttClient.loop();
 
     vTaskDelay( 100 / portTICK_PERIOD_MS);
@@ -240,6 +246,11 @@ void Network::publishBatteryReport(const Nuki::BatteryReport& batteryReport)
     publishInt(mqtt_topic_battery_lock_distance, batteryReport.lockDistance); // degrees
 }
 
+void Network::publishPresenceDetection(char *csv)
+{
+    _presenceCsv = csv;
+}
+
 void Network::setLockActionReceived(void (*lockActionReceivedCallback)(const char *))
 {
     _lockActionReceivedCallback = lockActionReceivedCallback;
diff --git a/Network.h b/Network.h
index a4040b2..abecfdb 100644
--- a/Network.h
+++ b/Network.h
@@ -18,6 +18,7 @@ public:
 
     void publishKeyTurnerState(const Nuki::KeyTurnerState& keyTurnerState, const Nuki::KeyTurnerState& lastKeyTurnerState);
     void publishBatteryReport(const Nuki::BatteryReport& batteryReport);
+    void publishPresenceDetection(char* csv);
 
     void setLockActionReceived(void (*lockActionReceivedCallback)(const char* value));
 
@@ -46,6 +47,8 @@ private:
     char _mqttUser[31] = {0};
     char _mqttPass[31] = {0};
 
+    char* _presenceCsv = nullptr;
+
     bool _firstTunerStatePublish = true;
 
     void (*_lockActionReceivedCallback)(const char* value) = NULL;
diff --git a/PresenceDetection.cpp b/PresenceDetection.cpp
index 74716dc..703dc19 100644
--- a/PresenceDetection.cpp
+++ b/PresenceDetection.cpp
@@ -1,13 +1,21 @@
 #include "PresenceDetection.h"
 
-PresenceDetection::PresenceDetection(BleScanner *bleScanner)
-: _bleScanner(bleScanner)
-{}
+PresenceDetection::PresenceDetection(BleScanner *bleScanner, Network* network)
+: _bleScanner(bleScanner),
+  _network(network)
+{
+    _csv = new char[presence_detection_buffer_size];
+}
 
 PresenceDetection::~PresenceDetection()
 {
     _bleScanner->unsubscribe(this);
     _bleScanner = nullptr;
+
+    _network = nullptr;
+
+    delete _csv;
+    _csv = nullptr;
 }
 
 void PresenceDetection::initialize()
@@ -17,23 +25,58 @@ void PresenceDetection::initialize()
 
 void PresenceDetection::update()
 {
-    vTaskDelay( 10000 / portTICK_PERIOD_MS);
+    vTaskDelay( 5000 / portTICK_PERIOD_MS);
 
+    if(_devices.size() == 0) return;
+
+    memset(_csv, 0, presence_detection_buffer_size);
+    _csvIndex = 0;
     long ts = millis();
     for(auto it : _devices)
     {
         if(ts - 20000 < it.second.timestamp)
         {
-            // TODO: publish to mqtt
+            buildCsv(it.second);
+        }
+
+        // Prevent csv buffer overflow
+        if(_csvIndex > presence_detection_buffer_size - (sizeof(it.second.name) + sizeof(it.second.address) + 3))
+        {
+            break;
         }
     }
+
+    _network->publishPresenceDetection(_csv);
 }
 
+
+void PresenceDetection::buildCsv(const PdDevice &device)
+{
+    for(int i = 0; i < 17; i++)
+    {
+        _csv[_csvIndex] = device.address[i];
+        ++_csvIndex;
+    }
+    _csv[_csvIndex] = ';';
+    ++_csvIndex;
+
+    int i=0;
+    while(device.name[i] != 0x00 && i < 30)
+    {
+        _csv[_csvIndex] = device.name[i];
+        ++_csvIndex;
+        ++i;
+    }
+    _csv[_csvIndex] = '\n';
+    _csvIndex++;
+}
+
+
 void PresenceDetection::onResult(NimBLEAdvertisedDevice *device)
 {
     std::string addressStr = device->getAddress().toString();
     char addrArrComp[13] = {0};
-//    aa:bb:cc:dd:ee:ff
+
     addrArrComp[0] = addressStr.at(0);
     addrArrComp[1] = addressStr.at(1);
     addrArrComp[2] = addressStr.at(3);
@@ -91,4 +134,4 @@ void PresenceDetection::onResult(NimBLEAdvertisedDevice *device)
 //    }
 //    Serial.println();
 
-}
+}
\ No newline at end of file
diff --git a/PresenceDetection.h b/PresenceDetection.h
index e2dc089..a7a1b6c 100644
--- a/PresenceDetection.h
+++ b/PresenceDetection.h
@@ -2,6 +2,7 @@
 
 #include "BleScanner.h"
 #include "BleInterfaces.h"
+#include "Network.h"
 
 struct PdDevice
 {
@@ -10,10 +11,12 @@ struct PdDevice
     unsigned long timestamp;
 };
 
+#define presence_detection_buffer_size 4096
+
 class PresenceDetection : public BLEScannerSubscriber
 {
 public:
-    PresenceDetection(BleScanner* bleScanner);
+    PresenceDetection(BleScanner* bleScanner, Network* network);
     virtual ~PresenceDetection();
 
     void initialize();
@@ -22,7 +25,14 @@ public:
     void onResult(NimBLEAdvertisedDevice* advertisedDevice) override;
 
 private:
+    void buildCsv(const PdDevice& device);
+
     BleScanner* _bleScanner;
+    Network* _network;
+    char* _csv = {0};
     std::map<long long, PdDevice> _devices;
     uint _timeout = 20000;
+    int _csvIndex = 0;
+
+
 };
diff --git a/main.cpp b/main.cpp
index 223bc46..de79591 100644
--- a/main.cpp
+++ b/main.cpp
@@ -41,7 +41,7 @@ void presenceDetectionTask(void *pvParameters)
 
 void setupTasks()
 {
-    xTaskCreate(networkTask, "ntw", 16384, NULL, 1, NULL);
+    xTaskCreate(networkTask, "ntw", 32768, NULL, 1, NULL);
     xTaskCreate(nukiTask, "nuki", 8192, NULL, 1, NULL);
     xTaskCreate(presenceDetectionTask, "prdet", 1024, NULL, 1, NULL);
 }
@@ -79,7 +79,7 @@ void setup()
     webCfgServer->initialize();
     nuki->initialize();
 
-    presenceDetection = new PresenceDetection(nuki->bleScanner());
+    presenceDetection = new PresenceDetection(nuki->bleScanner(), network);
     presenceDetection->initialize();
 
     setupTasks();