diff --git a/goTool/main.go b/goTool/main.go
index 417c9da..aa11ba4 100644
--- a/goTool/main.go
+++ b/goTool/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"flag"
 	"fmt"
 	"log"
 	"time"
@@ -8,28 +9,61 @@ import (
 	"alox.tool/api"
 	"alox.tool/eventbus"
 	"alox.tool/frontend"
+	"alox.tool/testrunner"
 	"alox.tool/uart"
 )
 
+var (
+	Tests bool
+)
+
 func main() {
+	flag.BoolVar(&Tests, "t", false, "Tests")
+
+	flag.Parse()
 	config := Config{
 		Port:     8000,
 		Host:     "0.0.0.0",
 		UartPort: "/dev/ttyUSB0",
 		Baudrate: 115200,
 	}
+	if Tests {
+		StartTests(config)
+		return
+	}
 	StartApp(config)
 }
 
-func StartApp(config Config) {
+func StartTests(config Config) {
 	bus := eventbus.New()
-
 	com, err := uart.Connect(bus, config.UartPort, config.Baudrate)
 	if err != nil {
 		log.Printf("Could not Connect with Uart Device %v", err)
 	}
 	defer com.Close()
 
+	tr := testrunner.New(bus, com)
+
+	testTest1 := make(map[string]func() error)
+	testTest1["Echo Test"] = tr.RunEchoTest
+	testTest1["Version Test"] = tr.RunVersionTest
+	testTest1["Info Test"] = tr.RunClientInfoTest
+	testTest1["Input Test"] = tr.RunClientInputTest
+
+	tr.RunTestSet(testTest1)
+}
+
+func StartApp(config Config) {
+	bus := eventbus.New()
+	com, err := uart.Connect(bus, config.UartPort, config.Baudrate)
+	if err != nil {
+		log.Printf("Could not Connect with Uart Device %v", err)
+	}
+	defer com.Close()
+
+	tr := testrunner.New(bus, com)
+	tr.RunVersionTest()
+
 	go func() {
 		for {
 			select {
@@ -52,7 +86,7 @@ func StartApp(config Config) {
 						log.Printf("Could not Parse Version %v", err)
 						continue
 					}
-					log.Printf("Version Info %d %X", v.Version, v.Buildhash)
+					log.Printf("Version Info %d %s", v.Version, v.Buildhash)
 				case api.CmdClientInfo:
 					v, err := uart.ParseFrameClientInfo(val)
 					if err != nil {
diff --git a/goTool/testrunner/runner.go b/goTool/testrunner/runner.go
index 1b961a7..494b88a 100644
--- a/goTool/testrunner/runner.go
+++ b/goTool/testrunner/runner.go
@@ -3,6 +3,9 @@ package testrunner
 import (
 	"context"
 	"fmt"
+	"io"
+	"log"
+	"os"
 	"time"
 
 	"alox.tool/api"
@@ -22,6 +25,37 @@ func New(bus eventbus.EventBus, com *uart.Com) *TestRunner {
 	}
 }
 
+func (tr *TestRunner) RunTestSet(TSet map[string]func() error) {
+	null, _ := os.OpenFile(os.DevNull, os.O_WRONLY, 0)
+	defer null.Close()
+
+	// Backups der originalen Deskriptoren
+	oldStdout := os.Stdout
+	oldStderr := os.Stderr
+	oldLogOut := log.Writer()
+
+	for name, f := range TSet {
+
+		// 1. Output komplett abdrehen
+		os.Stdout = null
+		os.Stderr = null
+		log.SetOutput(io.Discard)
+
+		err := f()
+
+		// 2. Sofort wiederherstellen für das Log-Resultat
+		os.Stdout = oldStdout
+		os.Stderr = oldStderr
+		log.SetOutput(oldLogOut)
+
+		if err != nil {
+			log.Printf("[%s]: \t\tFailed: %v", name, err)
+			continue
+		}
+		log.Printf("[%s]: \t\tSucceeded", name)
+	}
+}
+
 func (tr *TestRunner) Expect(idToSend byte, payload []byte, expectedID byte, timeout time.Duration) (*api.Frame, error) {
 	rxChan := tr.bus.Subscribe(api.TopicUARTRx)
 	defer tr.bus.Unsubscribe(api.TopicUARTRx, rxChan)
diff --git a/goTool/testrunner/tests.go b/goTool/testrunner/tests.go
index 184c729..4c5c04f 100644
--- a/goTool/testrunner/tests.go
+++ b/goTool/testrunner/tests.go
@@ -5,17 +5,58 @@ import (
 	"time"
 
 	"alox.tool/api"
+	"alox.tool/uart"
 )
 
-func (tr *TestRunner) RunVersionTest() error {
-	fmt.Println("Starte Version Test...")
+func (tr *TestRunner) RunEchoTest() error {
+	frame, err := tr.Expect(api.CmdEcho, []byte{0x01}, api.CmdEcho, 1*time.Second)
+	if err != nil {
+		return err
+	}
 
-	// Sende VersionRequest (0x02), erwarte VersionResponse (0x02)
+	if frame.Data[0] != 0x01 {
+		return fmt.Errorf("Got % X expected % X", frame.Data[0], 0x01)
+	}
+
+	return nil
+}
+
+func (tr *TestRunner) RunVersionTest() error {
 	frame, err := tr.Expect(api.CmdVersion, nil, api.CmdVersion, 1*time.Second)
 	if err != nil {
 		return err
 	}
 
-	fmt.Printf("Test bestanden! Hardware Version ist: %s\n", string(frame.Data))
+	// TODO: Check Version and Buildhash?
+	_, err = uart.ParseFrameVersion(*frame)
+	if err != nil {
+		return err
+	}
+
+	v, err := uart.ParseFrameVersion(*frame)
+	if v.Version != 1 {
+		return fmt.Errorf("Got %d expected %d", v.Version, 1)
+	}
+
+	return nil
+}
+
+func (tr *TestRunner) RunClientInfoTest() error {
+	_, err := tr.Expect(api.CmdClientInfo, nil, api.CmdClientInfo, 1*time.Second)
+	if err != nil {
+		return err
+	}
+
+	// TODO: Real Check
+	return nil
+}
+
+func (tr *TestRunner) RunClientInputTest() error {
+	_, err := tr.Expect(api.CmdClientInput, nil, api.CmdClientInput, 1*time.Second)
+	if err != nil {
+		return err
+	}
+
+	// TODO: Real Check
 	return nil
 }
diff --git a/goTool/uart/com.go b/goTool/uart/com.go
index 9800dfc..35cb71d 100644
--- a/goTool/uart/com.go
+++ b/goTool/uart/com.go
@@ -35,7 +35,7 @@ func Connect(bus eventbus.EventBus, portName string, baudrate int) (*Com, error)
 			default:
 				n, err := port.Read(buff)
 				if err != nil {
-					log.Print("Read Error:", err)
+					log.Print("[Warning]: Read Error:", err)
 					return // Loop beenden bei Hardware-Fehler
 				}
 				if n > 0 {