diff --git a/ampel-firmware/csv_writer.cpp b/ampel-firmware/csv_writer.cpp
index 35972cde0447c34b6ff32a14a4627b684730b3b5..412d9fd7854218028a6775fae5276324e0cd0dab 100644
--- a/ampel-firmware/csv_writer.cpp
+++ b/ampel-firmware/csv_writer.cpp
@@ -1,14 +1,11 @@
 #include "csv_writer.h"
 
 #include "config.h"
+#include "web_config.h"
 #include "ntp.h"
 #include "led_effects.h"
 #include "sensor_console.h"
 
-namespace config {
-  // Values should be defined in config.h
-  uint16_t csv_interval = CSV_INTERVAL; // [s]
-}
 namespace csv_writer {
   unsigned long last_written_at = 0;
   char last_successful_write[23];
@@ -166,7 +163,7 @@ namespace csv_writer {
 
   void logIfTimeHasCome(const char *timeStamp, const int16_t &co2, const float &temperature, const float &humidity) {
     unsigned long now = seconds();
-    if (now - last_written_at > config::csv_interval) {
+    if (now - last_written_at > *config::csv_interval) {
       last_written_at = now;
       log(timeStamp, co2, temperature, humidity);
     }
@@ -176,9 +173,9 @@ namespace csv_writer {
    * Callbacks for sensor commands                                 *
    *****************************************************************/
   void setCSVinterval(int32_t csv_interval) {
-    config::csv_interval = csv_interval;
+    *config::csv_interval = csv_interval;
     Serial.print(F("Setting CSV Interval to : "));
-    Serial.print(config::csv_interval);
+    Serial.print(*config::csv_interval);
     Serial.println("s.");
     led_effects::showKITTWheel(color::green, 1);
   }
diff --git a/ampel-firmware/csv_writer.h b/ampel-firmware/csv_writer.h
index dcee7130c27a23e66d20fb8b390889b0fd53468e..2afa4b628a956de177cea6467d526610cda9b72b 100644
--- a/ampel-firmware/csv_writer.h
+++ b/ampel-firmware/csv_writer.h
@@ -11,9 +11,6 @@
 #  error Board should be either ESP8266 or ESP832
 #endif
 
-namespace config {
-  extern uint16_t csv_interval; // [s]
-}
 namespace csv_writer {
   extern char last_successful_write[];
   void initialize(const char *sensorId);
diff --git a/ampel-firmware/web_config.cpp b/ampel-firmware/web_config.cpp
index b048bb26c53bec84c3ac724fda3b85fe409601d4..16583ce32ee8e95d0ebf68c1c8860e3d32c1b416 100644
--- a/ampel-firmware/web_config.cpp
+++ b/ampel-firmware/web_config.cpp
@@ -12,12 +12,6 @@
 #include <IotWebConf.h>
 #include <IotWebConfOptionalGroup.h>
 
-namespace config {
-  using namespace iotwebconf;
-  TextTParameter<STRING_LEN> stringParam =
-      Builder<TextTParameter<STRING_LEN>>("stringParam").label("String param").build();
-}
-
 //TODO: Is there any conflict with SPIFFS/LittleFS?
 //TODO: Actually use those parameters
 //TODO: Check memory consumption. Disable DEBUG info?
@@ -34,7 +28,7 @@ namespace web_config {
 
   IotWebConf *iotWebConf;
 
-  const char config_version[IOTWEBCONF_CONFIG_VERSION_LENGTH] = "a05"; // -- Configuration specific key. The value should be modified if config structure was changed.
+  const char config_version[IOTWEBCONF_CONFIG_VERSION_LENGTH] = "a06"; // -- Configuration specific key. The value should be modified if config structure was changed.
   using namespace iotwebconf;
 
   /**
@@ -219,20 +213,11 @@ namespace web_config {
 
     sensor_console::defineCommand("reset_config", []() {
       Serial.println(F("Resetting config..."));
-      //TODO: Reset every group
       iotWebConf->getSystemParameterGroup()->applyDefaultValue();
       iotWebConf->saveConfig();
       Serial.println(F("Done!"));
     }, F("(resets the complete IotWeb config)"));
 
-    sensor_console::defineStringCommand("conf", [](char *new_value) {
-      Serial.print(F("Setting stringParam to "));
-      Serial.println(new_value);
-      strncpy(config::stringParam.value(), new_value, STRING_LEN);
-      Serial.println(F("Done"));
-      iotWebConf->saveConfig();
-    }, F("some_text (config setter)"));
-
 #if !defined(AMPEL_WIFI)
     iotWebConf->loadConfig();
     return;
@@ -278,3 +263,7 @@ namespace web_config {
     });
   }
 }
+
+namespace config {
+  uint16_t *csv_interval = &web_config::csvTimestepParam.value();
+}
\ No newline at end of file
diff --git a/ampel-firmware/web_config.h b/ampel-firmware/web_config.h
index 047c4d25f90a03303956fcc76fc6ff1e61cf548f..22f1b1fdc52acfae7fc740e515f3ce222de787c2 100644
--- a/ampel-firmware/web_config.h
+++ b/ampel-firmware/web_config.h
@@ -12,7 +12,7 @@
 #include <IotWebConfTParameter.h>
 
 namespace config {
-  extern iotwebconf::TextTParameter<STRING_LEN> stringParam;
+  extern uint16_t *csv_interval; // [s]
 }
 
 namespace web_config {
diff --git a/ampel-firmware/web_server.cpp b/ampel-firmware/web_server.cpp
index a50986b0f5a29c16ceab0017af8d6b1b70828659..695d2a72dd6bd106590627478053aaf1889c09e5 100644
--- a/ampel-firmware/web_server.cpp
+++ b/ampel-firmware/web_server.cpp
@@ -247,7 +247,7 @@ namespace web_server {
     snprintf_P(content, sizeof(content), body_template, ampel.sensorId, sensor::co2, sensor::temperature,
         sensor::humidity, sensor::timestamp, config::measurement_timestep,
 #ifdef AMPEL_CSV
-        csv_writer::last_successful_write, config::csv_interval, csv_writer::getAvailableSpace() / 1024,
+        csv_writer::last_successful_write, *config::csv_interval, csv_writer::getAvailableSpace() / 1024,
 #endif
 #ifdef AMPEL_MQTT
         mqtt::connected ? "Yes" : "No", mqtt::last_successful_publish, config::mqtt_sending_interval,