diff --git a/examples/osd/arduino-settingsmanager/README.md b/examples/osd/arduino-settingsmanager/README.md
index 336ea808d..8f5921ead 100644
--- a/examples/osd/arduino-settingsmanager/README.md
+++ b/examples/osd/arduino-settingsmanager/README.md
@@ -1,8 +1,37 @@
-Arduino compatibility example
-=============================
+Arduino shell example
+=====================
+This example start a shell on merkurboard serial0 line.
+You can change the network parameters and store it in eeprom.
 
 make clean TARGET=osd-merkur-256 flash
 
+start a terminal programm
+-------------------------
+
+picocom -c -b 38400 --omap crcrlf /dev/ttyUSB0
+
+? [ENTER]
+Available commands:
+?: shows this help
+ccathresholds <threshold: change cca thresholds -91 to -61 dBm (default -77)
+exit: exit shell
+help: shows this help
+kill <command>: stop a specific command
+killall: stop all running commands
+null: discard input
+panid <0xabcd>: change panid (default 0xabcd)
+ps: list all running processes
+quit: exit shell
+reboot: reboot the system
+rfchannel <channel>: change radio channel (11 - 26)
+saverfparam <> save radio parameters txpower, channel, panid to eeprom settingsmanager
+txpower <power>: change transmission power 0 (3dbm, default) to 15 (-17.2dbm)
+
+------------------------------------------------------------------------------
+quit picocom, you need to press Ctrl-a , then Ctrl-q
+
+
+
 This example shows that it is now possible to re-use arduino sketches in
 Contiki. This example documents the necessary magic. Arduino specifies
 two routines, `setup` and `loop`. Before `setup` is called, the
diff --git a/examples/osd/arduino-settingsmanager/extended-rf-api.c b/examples/osd/arduino-settingsmanager/extended-rf-api.c
index ade7854d3..3d716ded3 100644
--- a/examples/osd/arduino-settingsmanager/extended-rf-api.c
+++ b/examples/osd/arduino-settingsmanager/extended-rf-api.c
@@ -32,12 +32,10 @@
  *   Example project demonstrating the extended RF API functionality
  */
 #include "contiki.h"
-#include "net/netstack.h"
-#include "dev/radio.h"
-
 #include <stdio.h>
 #include <stdint.h>
-#include <string.h>
+#include "net/netstack.h"
+#include "dev/radio.h"
 #include "extended-rf-api.h"
 /*---------------------------------------------------------------------------*/
 struct rf_consts {
diff --git a/examples/osd/arduino-settingsmanager/shell-merkur.c b/examples/osd/arduino-settingsmanager/shell-merkur.c
index e41ecac37..f231435c0 100644
--- a/examples/osd/arduino-settingsmanager/shell-merkur.c
+++ b/examples/osd/arduino-settingsmanager/shell-merkur.c
@@ -38,22 +38,13 @@
  */
 
 #include "contiki.h"
+#include <stdio.h>
+#include <stdlib.h>     /* strtol */
 #include "sys/cc.h"
-#include "shell-sky.h"
-
-#include "dev/watchdog.h"
-
-#include "net/rime/rime.h"
-#include "net/netstack.h"
-#include "net/rime/timesynch.h"
 #include "dev/radio.h"
-#include "sys/node-id.h"
-#include "lib/settings.h"
+#include "shell-merkur.h"
 #include "extended-rf-api.h"
 #include "params.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>     /* strtol */
 
 /*---------------------------------------------------------------------------*/
 PROCESS(shell_txpower_process, "txpower");
@@ -79,7 +70,7 @@ SHELL_COMMAND(ccathresholds_command,
 PROCESS(shell_saverfparam_process, "saverfparam");
 SHELL_COMMAND(saverfparam_command,
 	      "saverfparam",
-	      "saverfparam <> save parameters txpower, channel, panid to eeprom settingsmanager",
+	      "saverfparam <> save radio parameters txpower, channel, panid to eeprom settingsmanager",
 	      &shell_saverfparam_process);
 
 /*---------------------------------------------------------------------------*/
@@ -204,6 +195,8 @@ PROCESS_THREAD(shell_saverfparam_process, ev, data)
 void
 shell_merkur_init(void)
 {
+  shell_ps_init();
+  shell_reboot_init();
   shell_register_command(&txpower_command);
   shell_register_command(&rfchannel_command);
   shell_register_command(&ccathresholds_command);  
diff --git a/examples/osd/arduino-settingsmanager/sketch.pde b/examples/osd/arduino-settingsmanager/sketch.pde
index 2639b3a84..5c2159b8e 100644
--- a/examples/osd/arduino-settingsmanager/sketch.pde
+++ b/examples/osd/arduino-settingsmanager/sketch.pde
@@ -14,12 +14,8 @@ extern "C" {
 #include "arduino-process.h"
 #include "rest-engine.h"
 #include "net/netstack.h"
-#include "lib/settings.h"
-#include "shell.h"
 #include "serial-shell.h"
 #include "shell-merkur.h"
-#include "dev/radio.h"
-#include "extended-rf-api.h"
 
 extern resource_t res_led, res_battery, res_cputemp;
 
@@ -35,14 +31,7 @@ void setup (void)
     led_status=0;
     // Seriell Shell
     serial_shell_init();
-    shell_ps_init();
-    shell_reboot_init();
     shell_merkur_init();  
-#if COFFEE
-    shell_coffee_init();
-    shell_file_init();
-#endif
-
     // init coap resourcen
     rest_init_engine ();
     #pragma GCC diagnostic ignored "-Wwrite-strings"
diff --git a/platform/osd-merkur-256/params.c b/platform/osd-merkur-256/params.c
index 94e4e5b63..6b866f025 100644
--- a/platform/osd-merkur-256/params.c
+++ b/platform/osd-merkur-256/params.c
@@ -294,7 +294,6 @@ params_get_ccathresholds(void) {
 settings_status_t 
 params_save_panid(void) {
   radio_value_t value;
-  size_t  size = 2;
 
   settings_status_t rx=SETTINGS_STATUS_OK;