diff --git a/MiniBeieliNodeSketch/MiniBeieliNodeSketch.ino b/MiniBeieliNodeSketch/MiniBeieliNodeSketch.ino
index 3670a94..2ea0efb 100644
--- a/MiniBeieliNodeSketch/MiniBeieliNodeSketch.ino
+++ b/MiniBeieliNodeSketch/MiniBeieliNodeSketch.ino
@@ -12,7 +12,7 @@ BME280 bme280;
 /******************************************************************************/
 /* Firmware Version                                                           */
 /******************************************************************************/
-static const int32_t fwVersion = 20210426;
+static const int32_t fwVersion = 20210427;
 
 /******************************************************************************/
 /* LoraWAN Settings                                                           */
@@ -850,12 +850,14 @@ void AddSensorDataToLoraData()
     timer_pos0 = millis();
   }
   my_position++;
-
-  last_sensor_reading = sensor_data;
 }
 
 bool TooBigWeightChange()
 {
+  // on first position there cannot be a difference 
+  if (my_position == 1) {
+     return false;
+  }
   bool big_difference = (abs(last_sensor_reading.weight - sensor_data.weight) > SEND_DIFF_THRESHOLD_5GRAMS);
   if (big_difference) {
     lora_data.weight_last = sensor_data.weight;
@@ -907,7 +909,8 @@ bool ReadSensors(bool read_only)
   if (!read_only) {
     AddSensorDataToLoraData();
     send_data = (TooBigWeightChange()) || (my_position >= MAX_VALUES_TO_SEND) || (iteration <= INIT_PACKETS) || (iteration % INIT_PACKAGE_INTERVAL == 0);
-
+    last_sensor_reading = sensor_data;
+ 
     if (config_data.debug_level > 0) {
       if (send_data) {
         Serial.printf("Iteration: %d, we send the data...\n", iteration);
diff --git a/README.md b/README.md
index fa1abf5..42e88e3 100644
--- a/README.md
+++ b/README.md
@@ -67,5 +67,5 @@ $ mkdir ~/arduino-builds-saved/20210423/
 $ cp /tmp/arduino-sketch-0870BAA82DFEB3C4E076C8FBBDEB25B4/CubeCell_Board_REGION_EU868_RGB_0.cyacd ~/arduino-builds-saved/20210423/
 
 Upload:
-/home/joerg/Arduino/hardware/CubeCell/CubeCell/tools/CubeCellflash/CubeCellflash -serial /dev/ttyUSB0 /home/joerg/arduino-builds-saved/20210423/CubeCell_Board_REGION_EU868_RGB_0.cyacd
+/home/joerg/Arduino/hardware/CubeCell/CubeCell/tools/CubeCellflash/CubeCellflash -serial /dev/ttyUSB0 /home/joerg/arduino-builds-saved/latest/CubeCell_Board_REGION_EU868_RGB_0.cyacd
 `