diff --git a/src/TTN/plain_converter.js b/src/TTN/plain_converter.js
new file mode 100644
index 00000000..1302d56c
--- /dev/null
+++ b/src/TTN/plain_converter.js
@@ -0,0 +1,18 @@
+// Converter for device payload encoder "PLAIN"
+// copy&paste to TTN Console -> Applications -> PayloadFormat -> Converter
+
+function Converter(decoded, port) {
+
+  var converted = decoded;
+
+  if (port === 1) {
+    converted.pax = converted.ble + converted.wifi;
+    if (converted.hdop) {
+      converted.hdop /= 100;
+      converted.latitude /= 1000000;
+      converted.longitude /= 1000000;
+    }
+  }
+
+  return converted;
+}
\ No newline at end of file
diff --git a/src/TTN/plain_decoder.js b/src/TTN/plain_decoder.js
new file mode 100644
index 00000000..9f2768c6
--- /dev/null
+++ b/src/TTN/plain_decoder.js
@@ -0,0 +1,23 @@
+// Decoder for device payload encoder "PLAIN"
+// copy&paste to TTN Console -> Applications -> PayloadFormat -> Decoder
+
+function Decoder(bytes, port) {
+  var decoded = {};
+
+  if (port === 1) {
+    var i = 0;
+
+    decoded.wifi = (bytes[i++] << 8) | bytes[i++];
+    decoded.ble = (bytes[i++] << 8) | bytes[i++];
+
+    if (bytes.length > 4) {
+      decoded.latitude = ((bytes[i++] << 24) | (bytes[i++] << 16) | (bytes[i++] << 8) | bytes[i++]);
+      decoded.longitude = ((bytes[i++] << 24) | (bytes[i++] << 16) | (bytes[i++] << 8) | bytes[i++]);
+      decoded.sats = (bytes[i++]);
+      decoded.hdop = (bytes[i++] << 8) | (bytes[i++]);
+      decoded.altitude = (bytes[i++] << 8) | (bytes[i++]);
+    }
+  }
+
+  return decoded;
+}
\ No newline at end of file
diff --git a/src/TTN/serialized_converter.js b/src/TTN/serialized_converter.js
new file mode 100644
index 00000000..d9f3a79a
--- /dev/null
+++ b/src/TTN/serialized_converter.js
@@ -0,0 +1,13 @@
+// Converter for device payload encoder "SERIALIZED"
+// copy&paste to TTN Console -> Applications -> PayloadFormat -> Converter
+
+function Converter(decoded, port) {
+
+    var converted = decoded;
+
+    if (port === 1) {
+        converted.pax = converted.ble + converted.wifi;
+    }
+
+    return converted;
+}
\ No newline at end of file
diff --git a/src/TTN/serialized_decoder.js b/src/TTN/serialized_decoder.js
new file mode 100644
index 00000000..d928f031
--- /dev/null
+++ b/src/TTN/serialized_decoder.js
@@ -0,0 +1,162 @@
+// Decoder for device payload encoder "SERIALIZED"
+// copy&paste to TTN Console -> Applications -> PayloadFormat -> Decoder
+
+function Decoder(bytes, port) {
+
+    var decoded = {};
+
+    if (port === 1) {
+        // only counter data, no gps
+        if (bytes.length == 4) {
+            return decode(bytes, [uint16, uint16], ['wifi', 'ble']);
+        }
+        // combined counter and gps data
+        if (bytes.length > 4) {
+            return decode(bytes, [uint16, uint16, latlng, uint8, uint16, uint16], ['wifi', 'ble', 'coords', 'sats', 'hdop', 'altitude']);
+        }
+    }
+
+    if (port === 2) {
+        // device status data
+        if (bytes.length == 10) {
+            return decode(bytes, [uint16, unixtime, temperature], ['voltage', 'uptime', 'cputemp']);
+        }
+        // device config data
+        if (bytes.length == 8) {
+            return decode(bytes, [uint8, uint16, uint8, uint8, uint8, bitmap], ['lorasf', 'rssilimit', 'sendcycle', 'wifichancycle', 'blescantime', 'rgblum', 'flags']);
+        }
+    }
+
+}
+
+
+// ----- contents of /src/decoder.js --------------------------------------------
+// https://github.com/thesolarnomad/lora-serialization/blob/master/src/decoder.js
+
+var bytesToInt = function (bytes) {
+    var i = 0;
+    for (var x = 0; x < bytes.length; x++) {
+        i |= +(bytes[x] << (x * 8));
+    }
+    return i;
+};
+
+var unixtime = function (bytes) {
+    if (bytes.length !== unixtime.BYTES) {
+        throw new Error('Unix time must have exactly 4 bytes');
+    }
+    return bytesToInt(bytes);
+};
+unixtime.BYTES = 4;
+
+var uint8 = function (bytes) {
+    if (bytes.length !== uint8.BYTES) {
+        throw new Error('int must have exactly 1 byte');
+    }
+    return bytesToInt(bytes);
+};
+uint8.BYTES = 1;
+
+var uint16 = function (bytes) {
+    if (bytes.length !== uint16.BYTES) {
+        throw new Error('int must have exactly 2 bytes');
+    }
+    return bytesToInt(bytes);
+};
+uint16.BYTES = 2;
+
+var latLng = function (bytes) {
+    if (bytes.length !== latLng.BYTES) {
+        throw new Error('Lat/Long must have exactly 8 bytes');
+    }
+
+    var lat = bytesToInt(bytes.slice(0, latLng.BYTES / 2));
+    var lng = bytesToInt(bytes.slice(latLng.BYTES / 2, latLng.BYTES));
+
+    return [lat / 1e6, lng / 1e6];
+};
+latLng.BYTES = 8;
+
+var temperature = function (bytes) {
+    if (bytes.length !== temperature.BYTES) {
+        throw new Error('Temperature must have exactly 2 bytes');
+    }
+    var isNegative = bytes[0] & 0x80;
+    var b = ('00000000' + Number(bytes[0]).toString(2)).slice(-8)
+        + ('00000000' + Number(bytes[1]).toString(2)).slice(-8);
+    if (isNegative) {
+        var arr = b.split('').map(function (x) { return !Number(x); });
+        for (var i = arr.length - 1; i > 0; i--) {
+            arr[i] = !arr[i];
+            if (arr[i]) {
+                break;
+            }
+        }
+        b = arr.map(Number).join('');
+    }
+    var t = parseInt(b, 2);
+    if (isNegative) {
+        t = -t;
+    }
+    return t / 1e2;
+};
+temperature.BYTES = 2;
+
+var humidity = function (bytes) {
+    if (bytes.length !== humidity.BYTES) {
+        throw new Error('Humidity must have exactly 2 bytes');
+    }
+
+    var h = bytesToInt(bytes);
+    return h / 1e2;
+};
+humidity.BYTES = 2;
+
+var bitmap = function (byte) {
+    if (byte.length !== bitmap.BYTES) {
+        throw new Error('Bitmap must have exactly 1 byte');
+    }
+    var i = bytesToInt(byte);
+    var bm = ('00000000' + Number(i).toString(2)).substr(-8).split('').map(Number).map(Boolean);
+    return ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']
+        .reduce(function (obj, pos, index) {
+            obj[pos] = bm[index];
+            return obj;
+        }, {});
+};
+bitmap.BYTES = 1;
+
+var decode = function (bytes, mask, names) {
+
+    var maskLength = mask.reduce(function (prev, cur) {
+        return prev + cur.BYTES;
+    }, 0);
+    if (bytes.length < maskLength) {
+        throw new Error('Mask length is ' + maskLength + ' whereas input is ' + bytes.length);
+    }
+
+    names = names || [];
+    var offset = 0;
+    return mask
+        .map(function (decodeFn) {
+            var current = bytes.slice(offset, offset += decodeFn.BYTES);
+            return decodeFn(current);
+        })
+        .reduce(function (prev, cur, idx) {
+            prev[names[idx] || idx] = cur;
+            return prev;
+        }, {});
+};
+
+if (typeof module === 'object' && typeof module.exports !== 'undefined') {
+    module.exports = {
+        unixtime: unixtime,
+        uint8: uint8,
+        uint16: uint16,
+        temperature: temperature,
+        humidity: humidity,
+        latLng: latLng,
+        bitmap: bitmap,
+        decode: decode
+    };
+}
\ No newline at end of file
diff --git a/src/paxcounter.conf b/src/paxcounter.conf
index 990b0e81..0e83789e 100644
--- a/src/paxcounter.conf
+++ b/src/paxcounter.conf
@@ -37,11 +37,11 @@
 #define	WIFI_CHANNEL_SWITCH_INTERVAL    50      // [seconds/100] -> 0,5 sec.
 
 // LoRa payload send cycle --> take care of duty cycle of LoRaWAN network! <--
-//#define SEND_SECS                       120     // [seconds/2] -> 240 sec.
-#define SEND_SECS                       30     // [seconds/2] -> 60 sec.
+#define SEND_SECS                       120     // [seconds/2] -> 240 sec.
+//#define SEND_SECS                       30     // [seconds/2] -> 60 sec.
 #define MEM_LOW                         2048    // [Bytes] low memory threshold triggering a send cycle
 #define RETRANSMIT_RCMD                 5       // [seconds] wait time before retransmitting rcommand results
-#define PAYLOAD_ENCODER                 3       // select payload encoder: 1 = Plain [default], 2 = Lora-serialized, 3 = CayenneLPP
+#define PAYLOAD_ENCODER                 1       // select payload encoder: 1 = Plain [default], 2 = Lora-serialized, 3 = CayenneLPP
 #define PAYLOAD_BUFFER_SIZE             51      // maximum size of payload block per transmit
 
 // Default LoRa Spreadfactor
diff --git a/src/payload.cpp b/src/payload.cpp
index b1031295..72c4005e 100644
--- a/src/payload.cpp
+++ b/src/payload.cpp
@@ -79,11 +79,15 @@ void TTNplain::addStatus(uint16_t voltage, uint64_t uptime, float cputemp) {
 
 /* ---------------- packed format with LoRa serialization Encoder ---------- */
 
-TTNserialized::TTNserialized(uint8_t size) { buffer = (uint8_t *)malloc(size); }
+TTNserialized::TTNserialized(uint8_t size) {
+  buffer = (uint8_t *)malloc(size);
+  //LoraEncoder message(buffer);
+}
 
 TTNserialized::~TTNserialized(void) { free(buffer); }
 
-void TTNserialized::reset(void) { } // buggy! to be done, we need to clear the buffer here, but how? 
+void TTNserialized::reset(void) {
+} // buggy! to be done, we need to clear the buffer here, but how?
 
 uint8_t TTNserialized::getSize(void) { return sizeof(buffer); }
 
@@ -143,12 +147,12 @@ uint8_t *CayenneLPP::getBuffer(void) { return buffer; }
 
 void CayenneLPP::addCount(uint16_t value1, uint16_t value2) {
   buffer[cursor++] = LPP_COUNT_WIFI_CHANNEL;
-  buffer[cursor++] = LPP_LUMINOSITY; // workaround, type meter not found?
+  buffer[cursor++] = LPP_ANALOG_INPUT; // workaround, type meter not found?
   buffer[cursor++] = value1 >> 8;
   buffer[cursor++] = value1;
   buffer[cursor++] = LPP_COUNT_BLE_CHANNEL;
-  buffer[cursor++] = LPP_LUMINOSITY; // workaround, type meter not found?
-  buffer[cursor++] = value2 >> 8;
+  buffer[cursor++] = LPP_ANALOG_INPUT; // workaround, type meter not found?
+  buffer[cursor++] = value1 >> 8;
   buffer[cursor++] = value2;
 }