diff --git a/Gopkg.lock b/Gopkg.lock
index 41f2e8f..7fff1c3 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -3,11 +3,11 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:36cccfe52f1b5332dd9374abca00bdb31b99a757c15b8a2b103f3f7b4541816b"
+  digest = "1:4821a07614f34a7cd1e84604dc43e26dcaf63a9e943373786987cc0e6397bbb2"
   name = "git.cryptic.systems/fh-trier/go-flucky-server"
   packages = ["pkg/types"]
   pruneopts = "UT"
-  revision = "3ce11606f75951619536ec3e3e501bc31dc53dd7"
+  revision = "899da985091daddedd2f6500b2facfa97e03e860"
 
 [[projects]]
   branch = "master"
diff --git a/vendor/git.cryptic.systems/fh-trier/go-flucky-server/pkg/types/types.go b/vendor/git.cryptic.systems/fh-trier/go-flucky-server/pkg/types/types.go
index d91aa06..bf00350 100644
--- a/vendor/git.cryptic.systems/fh-trier/go-flucky-server/pkg/types/types.go
+++ b/vendor/git.cryptic.systems/fh-trier/go-flucky-server/pkg/types/types.go
@@ -1,12 +1,19 @@
 package types
 
 import (
-	"encoding/json"
-	"fmt"
-	"io"
 	"time"
 )
 
+// Checkpoint ...
+type Checkpoint struct {
+	CheckpointID   string    `json:"checkpoint_id"`
+	CheckpointDate time.Time `json:"checkpoint_date,string"`
+	RFID           string    `json:"rfid"`
+	ProductID      string    `json:"product_id"`
+	SensorID       string    `json:"sensor_id"`
+	CreationDate   time.Time `json:"creation_date"`
+}
+
 // Device ...
 type Device struct {
 	DeviceID          string    `json:"device_id"`
@@ -16,26 +23,6 @@ type Device struct {
 	CreationDate      time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (d *Device) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&d)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (d *Device) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&d); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // Failnoise ...
 type Failnoise struct {
 	FailnoiseID        string    `json:"failnoise_id"`
@@ -46,26 +33,6 @@ type Failnoise struct {
 	CreationDate       time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (f *Failnoise) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&f)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (f *Failnoise) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&f); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // Humidity ...
 type Humidity struct {
 	HumidityID    string    `json:"humidity_id"`
@@ -75,26 +42,6 @@ type Humidity struct {
 	CreationDate  time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (h *Humidity) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&h)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (h *Humidity) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&h); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // Knock ...
 type Knock struct {
 	KnockID        string    `json:"knock_id"`
@@ -105,26 +52,6 @@ type Knock struct {
 	CreationDate   time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (k *Knock) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&k)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (k *Knock) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&k); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // Sensor ...
 type Sensor struct {
 	SensorID          string    `json:"sensor_id"`
@@ -139,26 +66,6 @@ type Sensor struct {
 	CreationDate      time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (s *Sensor) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&s)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (s *Sensor) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&s); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // ReadableSensorName returns a readable sensor name
 func (s *Sensor) ReadableSensorName() string {
 	if s.SensorName != nil {
@@ -179,26 +86,6 @@ type Temperature struct {
 	CreationDate     time.Time `json:"creation_date"`
 }
 
-// EncodeToJSON needs a writer to write the struct into json string
-func (t *Temperature) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&t)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (t *Temperature) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&t); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
-
 // Throughput ...
 type Throughput struct {
 	ThroughputID        string    `json:"throughput_id"`
@@ -208,23 +95,3 @@ type Throughput struct {
 	SensorID            string    `json:"sensor_id"`
 	CreationDate        time.Time `json:"creation_date"`
 }
-
-// EncodeToJSON needs a writer to write the struct into json string
-func (t *Throughput) EncodeToJSON(w io.Writer) error {
-	encoder := json.NewEncoder(w)
-	encoder.SetIndent("", "  ")
-	err := encoder.Encode(&t)
-	if err != nil {
-		return fmt.Errorf("Error in encoding struct to json: %v", err)
-	}
-	return nil
-}
-
-// DecodeFromJSON decode a json string from a reader into a struct
-func (t *Throughput) DecodeFromJSON(r io.Reader) error {
-	decoder := json.NewDecoder(r)
-	if err := decoder.Decode(&t); err != nil {
-		return fmt.Errorf("Can not unmarshal JSON: %v", err)
-	}
-	return nil
-}
diff --git a/vendor/github.com/MichaelS11/go-dht/dhtNotWindows.go b/vendor/github.com/MichaelS11/go-dht/dhtNotWindows.go
index 26e51e7..62c03bb 100644
--- a/vendor/github.com/MichaelS11/go-dht/dhtNotWindows.go
+++ b/vendor/github.com/MichaelS11/go-dht/dhtNotWindows.go
@@ -4,7 +4,6 @@ package dht
 
 import (
 	"fmt"
-	"log"
 	"runtime/debug"
 	"strings"
 	"time"
@@ -93,8 +92,6 @@ func (dht *DHT) readBits() ([]int, error) {
 	// enable garbage collection, done with critical part
 	debug.SetGCPercent(gcPercent)
 
-	log.Printf("%v\n", levels)
-
 	// set pin to high so ready for next time
 	err = dht.pin.Out(gpio.High)
 	if err != nil {