diff --git a/pkg/logfile/logfile.go b/pkg/logfile/logfile.go
index 23b2f95..0def712 100644
--- a/pkg/logfile/logfile.go
+++ b/pkg/logfile/logfile.go
@@ -12,9 +12,6 @@ import (
 	"github.com/volker-raschek/flucky/pkg/types"
 )
 
-// Define the entry size for each logfile
-var templeratureSplitBy = 10000
-
 // CompressTemperature compresses the temperatures from an array. It is checked
 // whether the measured temperature of a value corresponds to that of the
 // predecessor. If this is the case, the current value is discarded and the
@@ -54,6 +51,7 @@ func CompressTemperature(temperatures []*types.Temperature) []*types.Temperature
 	return compressedTemperatures
 }
 
+// ReadTemperatures from a file and returns an array with temperatures
 func ReadTemperatures(temperatureLogfile string) ([]*types.Temperature, error) {
 
 	if _, err := os.Stat(temperatureLogfile); os.IsNotExist(err) {
@@ -76,6 +74,8 @@ func ReadTemperatures(temperatureLogfile string) ([]*types.Temperature, error) {
 	return temperatures, nil
 }
 
+// ReadTemperaturesCustom from a custom reader and returns an array with
+// temperatures
 func ReadTemperaturesCustom(r io.Reader) ([]*types.Temperature, error) {
 
 	temperatures := make([]*types.Temperature, 0)
@@ -89,7 +89,9 @@ func ReadTemperaturesCustom(r io.Reader) ([]*types.Temperature, error) {
 	return temperatures, nil
 }
 
-func SplittTemperatures(temperatures []*types.Temperature) [][]*types.Temperature {
+// SplittTemperatures into multiple arrays. The Size can be defined by
+// temperatureSplitBy parameter.
+func SplittTemperatures(temperatures []*types.Temperature, templeratureSplitBy int) [][]*types.Temperature {
 	splittedTemperatures := make([][]*types.Temperature, 0)
 	newTemperatures := make([]*types.Temperature, 0)
 	for _, temperature := range temperatures {
@@ -103,12 +105,15 @@ func SplittTemperatures(temperatures []*types.Temperature) [][]*types.Temperatur
 	return splittedTemperatures
 }
 
+// SortTemperatures by TemperatureFromDate
 func SortTemperatures(temperatures []*types.Temperature) {
 	sort.SliceStable(temperatures, func(i int, j int) bool {
 		return temperatures[i].TemperatureFromDate.Before(temperatures[j].TemperatureFromDate)
 	})
 }
 
+// WriteTemperatures encode temperatures into json and write it into a file.
+// Compression can be enabled over a bolean parameter
 func WriteTemperatures(temperatures []*types.Temperature, temperatureLogfile string, compression bool) error {
 
 	allTemperatures := make([]*types.Temperature, 0)
@@ -156,6 +161,8 @@ func WriteTemperatures(temperatures []*types.Temperature, temperatureLogfile str
 	return nil
 }
 
+// WriteTemperaturesCustom encode temperatures into json and write it into
+// custom writer. Compression can be enabled over a bolean parameter
 func WriteTemperaturesCustom(temperatures []*types.Temperature, w io.Writer, compression bool) error {
 
 	if compression {