diff --git a/cube/User/Inc/cmdHelper.h b/cube/User/Inc/cmdHelper.h
index 744b324..9bfa723 100644
--- a/cube/User/Inc/cmdHelper.h
+++ b/cube/User/Inc/cmdHelper.h
@@ -8,7 +8,7 @@
 typedef bool (*cmdFunc_t)(uint8_t argc, char **args);
 
 typedef struct {
-    char name[16];
+    char name[24];
     char help[512];
     cmdFunc_t cmdFunc;
 } cmd_t;
diff --git a/cube/User/Src/configCmds.c b/cube/User/Src/configCmds.c
index 941ff9f..5578810 100644
--- a/cube/User/Src/configCmds.c
+++ b/cube/User/Src/configCmds.c
@@ -5,6 +5,7 @@
 #include <config.h>
 
 #include <string.h>
+#include <stdlib.h>
 
 
 
@@ -13,6 +14,8 @@ static bool showConfigCmd(uint8_t argc, char **args) {
 
     t_configBlock configBlock;
     eepromReadConfigBlock(&configBlock);
+    sendString("This is the saved configuration.\n\r");
+    sendString("It is not necessarily the active configuration.\n\r");
     sendFormatString("configMagic:         %lx\n\r", configBlock.configMagic);
     sendFormatString("deviceName:          %s\n\r", configBlock.deviceName);
     sendFormatString("MAC address:         %02x:%02x:%02x:%02x:%02x:%02x\n\r", configBlock.macAddress[0], 
@@ -54,14 +57,14 @@ static bool showConfigCmd(uint8_t argc, char **args) {
 
 
 
-static bool setStringParameterCmd(uint8_t argc, char **args, size_t offset) {
+static bool setStringParameterCmd(uint8_t argc, char **args, size_t offset, size_t length) {
     bool retCode = true;
 
     t_configBlock configBlock;
     char *parameterName = args[1];
     char *newParameterValue = args[2];
-    if (strlen(newParameterValue) >= sizeof(configBlock.deviceName)) {   // FIXME
-        sendFormatString("given new value for %s is too long\n\r", parameterName);
+    if (strlen(newParameterValue) >= length) {
+        sendString("given new value for is too long\n\r");
         retCode = false;
     } else {
         sendFormatString("set %s to %s\n\r", parameterName, newParameterValue);
@@ -74,35 +77,78 @@ static bool setStringParameterCmd(uint8_t argc, char **args, size_t offset) {
     return retCode;
 }
 
+static bool setInt32ParameterCmd(uint8_t argc, char **args, size_t offset, int32_t minV, int32_t maxV) {
+    bool retCode = true;
+
+    t_configBlock configBlock;
+    char *parameterName = args[1];
+    char *newParameterValue = args[2];
+    long int value = strtol(newParameterValue, NULL, 10);
+    if (value < minV) {
+        sendString("value is too small\n\r");
+        retCode = false;
+    } else if (value > maxV) {
+        sendString("value is too large\n\r");
+    } else {
+        int32_t v = (int32_t) value;
+        sendFormatString("set %s to %ld\n\r", parameterName, v);
+
+        eepromReadConfigBlock(&configBlock);
+        *((int32_t*)(((uint8_t*)&configBlock) + offset)) = v;
+        eepromWriteConfigBlock(&configBlock);
+    }
+
+    return retCode;
+}
+
 
 static bool setDeviceNameCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, deviceName));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, deviceName), 
+                                 sizeof(((t_configBlock*)0)->deviceName));
 }
 
 static bool setBrokerNameCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, brokerName));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, brokerName), 
+                                 sizeof(((t_configBlock*)0)->brokerName));
 }
 
 static bool setSyslogServerCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, syslogServerName));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, syslogServerName), 
+                                 sizeof(((t_configBlock*)0)->syslogServerName));
 }
 
 static bool setWatchdogTopicCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, watchdogTopic));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, watchdogTopic), 
+                                 sizeof(((t_configBlock*)0)->watchdogTopic));
 }
 
 static bool setStartupTopicCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, startupTopic));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, startupTopic), 
+                                 sizeof(((t_configBlock*)0)->startupTopic));
 }
 
 static bool setStatusTopicCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, statusTopic));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, statusTopic), 
+                                 sizeof(((t_configBlock*)0)->statusTopic));
 }
 
 static bool setMbusDataTopicCmd(uint8_t argc, char **args) {
-    return setStringParameterCmd(argc, args, offsetof(t_configBlock, mbusDataTopic));
+    return setStringParameterCmd(argc, args, 
+                                 offsetof(t_configBlock, mbusDataTopic), 
+                                 sizeof(((t_configBlock*)0)->mbusDataTopic));
 }
 
+static bool setFrontendThresholdCmd(uint8_t argc, char **args) {
+    return setInt32ParameterCmd(argc, args,
+                                offsetof(t_configBlock, frontendThreshold),
+                                0, 1023);
+}
 
 const static cmd_t SET_COMMANDS[] = {
     { .name = "devicename", .cmdFunc = setDeviceNameCmd,
@@ -133,6 +179,10 @@ const static cmd_t SET_COMMANDS[] = {
       .help = \
         "mbusdatatopic ........................ MBus Data Topic\n\r"
     },
+    { .name = "frontendthreshold", .cmdFunc = setFrontendThresholdCmd,
+      .help = \
+        "frontendthreshold ........................ Frontend Threshold (default: 240)\n\r"
+    },
     { .name = "END_OF_CMDS", .help = "",.cmdFunc = NULL }
 };