diff --git a/lib/BleFingerprint/BleFingerprint.cpp b/lib/BleFingerprint/BleFingerprint.cpp
index 00d2512..6a331c4 100644
--- a/lib/BleFingerprint/BleFingerprint.cpp
+++ b/lib/BleFingerprint/BleFingerprint.cpp
@@ -12,6 +12,8 @@ static const int defaultTxPower = -59;
 
 #define ENDIAN_CHANGE_U16(x) ((((x)&0xFF00) >> 8) + (((x)&0xFF) << 8))
 #define Sprintf(f, ...) ({ char* s; asprintf(&s, f, __VA_ARGS__); String r = s; free(s); r; })
+#define SDateTimef(f) ({ struct tm firstSeenTm; gmtime_r(&f, &firstSeenTm); Sprintf("%d/%d/%d %d:%.2d:%.2d", firstSeenTm.tm_mon, firstSeenTm.tm_mday, 1900 + firstSeenTm.tm_year, firstSeenTm.tm_hour, firstSeenTm.tm_min, firstSeenTm.tm_sec); })
+#define SMacf(f) ({ auto nativeAddress = f.getNative(); Sprintf("%02x%02x%02x%02x%02x%02x", nativeAddress[5], nativeAddress[4], nativeAddress[3], nativeAddress[2], nativeAddress[1], nativeAddress[0]); })
 
 static String getProximityUUIDString(BLEBeacon beacon)
 {
@@ -38,6 +40,7 @@ static String getProximityUUIDString(BLEBeacon beacon)
 
 BleFingerprint::BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float initalDistance)
 {
+    firstSeen = time(nullptr);
     address = advertisedDevice->getAddress();
 
     auto nativeAddress = address.getNative();
@@ -45,7 +48,6 @@ BleFingerprint::BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float init
 
     Serial.print("MAC: ");
     Serial.print(mac_address);
-    doc["mac"] = mac_address;
 
     if (advertisedDevice->haveName())
         name = String(advertisedDevice->getName().c_str());
@@ -80,7 +82,6 @@ BleFingerprint::BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float init
             oBeacon.setData(strServiceData);
             // Serial.printf("Eddystone Frame Type (Eddystone-URL) ");
             // Serial.printf(oBeacon.getDecodedURL().c_str());
-            doc["url"] = oBeacon.getDecodedURL().c_str();
             Serial.print(" URL: ");
             Serial.print(oBeacon.getDecodedURL().c_str());
             setCalRssi(oBeacon.getPower());
@@ -101,7 +102,6 @@ BleFingerprint::BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float init
             {
                 std::string sid = advertisedDevice->getServiceUUID(i).toString();
                 Serial.printf(", sID: %s", sid.c_str());
-                doc["sid" + String(i)] = sid;
             }
         }
         if (advertisedDevice->haveManufacturerData() == true)
@@ -165,6 +165,8 @@ BleFingerprint::BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float init
 
 void BleFingerprint::seen(BLEAdvertisedDevice *advertisedDevice)
 {
+    lastSeen = time(nullptr);
+
     rssi = advertisedDevice->getRSSI();
     if (!calRssi)
         calRssi = defaultTxPower;
@@ -180,29 +182,43 @@ void BleFingerprint::seen(BLEAdvertisedDevice *advertisedDevice)
         inter2.timestamp = inter1.timestamp;
         inter2.value = oneEuro(inter1.value);
         if (diffFilter.push(&inter2, &output))
-            ;
+            hasValue = true;
     }
-
-    //if (id == "2c96d71f47569faddd487c93cc9dac2e-0-0")
-    //Serial.printf("%-36s %d %5.1f %5.1f %5.1f %5.1f\n", id.c_str(), inter2.timestamp, distFl, inter2.value, output.value.speed * 1e6, output.value.acceleration * 1e12);
 }
 
-void BleFingerprint::report(BLEAdvertisedDevice *advertisedDevice)
+bool BleFingerprint::shouldReport()
 {
-    //Serial.printf("%s", id.c_str());
-    //Serial.printf(", RSSI: %d (@1m %d)", rssi, calRssi);
-    //Serial.printf(", Dist: %.1f (orig %.1f)", distance, original);
-    //Serial.println();
-    if (id == nullptr && name == nullptr && output.value.position > 0)
-        return;
+    if (id == nullptr && name == nullptr)
+        return false;
+
+    if (!hasValue)
+        return false;
+
+    return true;
+}
+
+StaticJsonDocument<512> BleFingerprint::report()
+{
+    StaticJsonDocument<512> doc;
+#if VERBOSE
+    //   if (id == "iBeacon:2c96d71f47569faddd487c93cc9dac2e-0-0")
+    //     Serial.printf("%-36s %lu %5.1f %5.1f %5.1f\n", id.c_str(), output.timestamp, output.value.position, output.value.speed * 1e6, output.value.acceleration * 1e12);
+#endif
 
     if (id != nullptr)
-        doc["id"] = id;
+        doc[F("id")] = id;
     if (name != nullptr)
-        doc["name"] = name;
-    doc["rssi@1m"] = calRssi;
-    doc["rssi"] = rssi;
-    doc["raw"] = round(raw * 100.0f) / 100.0f;
-    doc["distance"] = round(output.value.position * 100.0f) / 100.0f;
-    doc["speed"] = round(output.value.speed * 100.0f) / 100.0f;
+        doc[F("name")] = name;
+
+    doc[F("rssi@1m")] = calRssi;
+    doc[F("rssi")] = rssi;
+
+    doc[F("mac")] = SMacf(address);
+    doc[F("raw")] = round(raw * 100.0f) / 100.0f;
+    doc[F("distance")] = round(output.value.position * 100.0f) / 100.0f;
+    doc[F("speed")] = round(output.value.speed * 1e7f) / 10.0f;
+
+    doc[F("first")] = SDateTimef(firstSeen);
+    doc[F("last")] = SDateTimef(lastSeen);
+    return doc;
 }
diff --git a/lib/BleFingerprint/BleFingerprint.h b/lib/BleFingerprint/BleFingerprint.h
index e2759cd..e76eb55 100644
--- a/lib/BleFingerprint/BleFingerprint.h
+++ b/lib/BleFingerprint/BleFingerprint.h
@@ -16,25 +16,26 @@ public:
     BleFingerprint(BLEAdvertisedDevice *advertisedDevice, float initalDistance);
 
     void seen(BLEAdvertisedDevice *advertisedDevice);
-    void report(BLEAdvertisedDevice *advertisedDevice);
+    bool shouldReport();
+    StaticJsonDocument<512> report();
 
     void setCalRssi(int rssi) { calRssi = rssi; }
 
-    StaticJsonDocument<500> getJson() { return doc; }
     NimBLEAddress getAddress() { return address; }
 
 private:
+    bool hasValue;
     NimBLEAddress address;
-    String id, name;
+    String id, name, url;
     int rssi, calRssi;
     float raw;
+    time_t firstSeen;
+    time_t lastSeen;
+
     Reading<Differential<float>> output;
 
     TimestampFilter<float> tsFilter;
     one_euro_filter<double, unsigned long> oneEuro{one_euro_filter<double, unsigned long>(1, 0.01, 0.01, 1)};
     DifferentialFilter<float> diffFilter;
-
-    StaticJsonDocument<500> doc;
-    unsigned long lastReading = 0;
 };
 #endif
diff --git a/src/main.cpp b/src/main.cpp
index 950ccd5..a5cea6e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -295,8 +295,10 @@ bool reportDevice(BLEAdvertisedDevice advertisedDevice)
 {
     BleFingerprint *f = getFingerprint(&advertisedDevice);
 
-    f->report(&advertisedDevice);
-    StaticJsonDocument<500> doc = f->getJson();
+    if (!f->shouldReport())
+        return false;
+
+    auto doc = f->report();
     char JSONmessageBuffer[512];
     serializeJson(doc, JSONmessageBuffer);
     String id = doc["id"];
@@ -310,7 +312,7 @@ bool reportDevice(BLEAdvertisedDevice advertisedDevice)
             if (mqttClient.publish((char *)publishTopic.c_str(), 0, 0, JSONmessageBuffer) && mqttClient.publish((char *)publishTopic2.c_str(), 0, 0, JSONmessageBuffer))
             {
 #if VERBOSE
-                Serial.println(JSONmessageBuffer);
+//                Serial.println(JSONmessageBuffer);
 #endif
                 return true;
             }