diff --git a/devices/devices.go b/devices/devices.go
index 5995685..5b29ac0 100644
--- a/devices/devices.go
+++ b/devices/devices.go
@@ -4,8 +4,8 @@ import (
 	"net"
 )
 
-// [impl->dsn~low-level-abstraction~0]
-// [impl->dsn~list-devices~0]
+// [impl->dsn~low-level-abstraction~0>>utest]
+// [impl->dsn~list-devices~0>>utest]
 
 // Transmitter interface for sending packets
 type Transmitter interface {
diff --git a/devices/devices_linux.go b/devices/devices_linux.go
index 0aa10a6..2078238 100644
--- a/devices/devices_linux.go
+++ b/devices/devices_linux.go
@@ -1,6 +1,6 @@
 package devices
 
-// [impllnx    dsn~low-level-abstraction~0]
+// [impllnx    dsn~low-level-abstraction~0>>utest]
 
 import "golang.org/x/sys/unix"
 
@@ -11,7 +11,8 @@ type TransmitterLinux struct {
 
 // Send implements sending packets on Linux
 func (tl TransmitterLinux) Send(data []byte) error {
-	return nil
+	err := unix.Send(tl.socket, data, 0)
+	return err
 }
 
 // Close closes the transmitter socket
@@ -32,5 +33,6 @@ func CreateTransmitter(device string) (Transmitter, error) {
 
 // CreateReceiver creates and starts the Receiver instance
 func CreateReceiver(device string) (Receiver, error) {
+	//TODO
 	return nil, nil
 }
diff --git a/devices/devices_test.go b/devices/devices_test.go
new file mode 100644
index 0000000..b516ee7
--- /dev/null
+++ b/devices/devices_test.go
@@ -0,0 +1,60 @@
+package devices_test
+
+import (
+	"fmt"
+	"testing"
+
+	"gitea.mmo.to/ppForge/ppforge/devices"
+)
+
+func TestListDevices(t *testing.T) {
+	list, err := devices.List()
+	if err != nil {
+		fmt.Println("Got error: ", err)
+		t.Fail()
+	}
+	fmt.Printf("%s", list)
+	lo_in_list := false
+	for _, e := range list {
+		if e == "lo" {
+			lo_in_list = true
+		}
+	}
+	if !lo_in_list {
+		t.Fail()
+	}
+}
+
+func TestGetHardwareAddress(t *testing.T) {
+	list, err := devices.List()
+	if err != nil {
+		fmt.Println("Got error: ", err)
+		t.Fail()
+	}
+	fmt.Printf("%s", list)
+
+	hwaddr, err := devices.GetHardwareAddress(list[1])
+	fmt.Println("Hardware address: ", hwaddr)
+
+	if hwaddr == "" || err != nil {
+		// might have catched lo ?
+		fmt.Println("catched 'lo'? or error: ", err)
+		t.Fail()
+	}
+}
+
+func TestGetAddresses(t *testing.T) {
+	list, err := devices.List()
+	if err != nil {
+		fmt.Println("Got error: ", err)
+		t.Fail()
+	}
+	fmt.Printf("%s", list)
+	addrlist, err := devices.GetAddresses(list[1])
+	fmt.Println("Addresses: ", addrlist)
+
+	if len(addrlist) == 0 || err != nil {
+		fmt.Println("Addrlist empty? or error: ", err)
+		t.Fail()
+	}
+}