diff --git a/ampel-firmware/config.public.h b/ampel-firmware/config.public.h
index 900974d..0e980b2 100644
--- a/ampel-firmware/config.public.h
+++ b/ampel-firmware/config.public.h
@@ -1,6 +1,8 @@
 #ifndef CONFIG_H_INCLUDED
 #  define CONFIG_H_INCLUDED
 
+
+#define buttonPin 0
 // This file is a config template, and can be copied to config.h. Please don't save any important password in this template.
 
 /**
@@ -18,8 +20,8 @@
  * WIFI
  */
 
-#  define WIFI_SSID     "MY_SSID"
-#  define WIFI_PASSWORD "P4SSW0RD"
+#  define WIFI_SSID     ""
+#  define WIFI_PASSWORD ""
 #  define WIFI_TIMEOUT  30 // [s]
 
 /**
@@ -28,7 +30,7 @@
 
 // How often should measurement be performed, and displayed?
 //NOTE: SCD30 timer does not seem to be very precise. Variations may occur.
-#  define MEASUREMENT_TIMESTEP 60 // [s] Value between 2 and 1800 (range for SCD30 sensor)
+#  define MEASUREMENT_TIMESTEP 10 // [s] Value between 2 and 1800 (range for SCD30 sensor)
 
 // How often should measurements be appended to CSV ?
 // Probably a good idea to use a multiple of MEASUREMENT_TIMESTEP, so that averages can be calculated
@@ -43,7 +45,7 @@
 // Altitude above sea level
 // Used for CO2 calibration
 // here: Stuttgart, Schellingstr. 24. (Source: Google Earth)
-#  define ALTITUDE_ABOVE_SEA_LEVEL 260 // [m]
+#  define ALTITUDE_ABOVE_SEA_LEVEL 680 // [m]
 
 // The reference CO2 concentration has to be within the range 400 ppm ≤ cref(CO2) ≤ 2000 ppm.
 // Used for CO2 calibration
@@ -52,17 +54,16 @@
 
 // Should the sensor try to calibrate itself?
 // Sensirion recommends 7 days of continuous readings with at least 1 hour a day of 'fresh air' for self-calibration to complete.
-#  define AUTO_CALIBRATE_SENSOR true // [true / false]
+#  define AUTO_CALIBRATE_SENSOR false // [true / false]
 
 /**
  * LEDs
  */
 
 // LED brightness, which can vary between min and max brightness ("LED breathing")
-// MAX_BRIGHTNESS must be defined, and should be between 0 and 255.
-#  define MAX_BRIGHTNESS 255
-// MIN_BRIGHTNESS, if defined, should be between 0 and MAX_BRIGHTNESS - 1
-// If MIN_BRIGHTNESS is not set, or if it is set to MAX_BRIGHTNESS, breathing is disabled.
+// max_brightness should be between 0 and 255.
+// min_brightness should be between 0 and max_brightness
+#  define MAX_BRIGHTNESS 128
 #  define MIN_BRIGHTNESS 60
 
 /**
@@ -71,8 +72,8 @@
  */
 
 // Define empty strings in order to disable authentication, or remove the constants altogether.
-#  define HTTP_USER "co2ampel"
-#  define HTTP_PASSWORD "my_password"
+#  define HTTP_USER ""
+#  define HTTP_PASSWORD ""
 
 /**
  * MQTT
@@ -144,11 +145,11 @@
  */
 
 #  define NTP_SERVER "pool.ntp.org"
-#  define UTC_OFFSET_IN_SECONDS 7200 // [s] 3600 for UTC+1, 7200 for UTC+1 and daylight saving time
+#  define UTC_OFFSET_IN_SECONDS 3600 // [s] 3600 for UTC+1
 
 /**
  * Others
  */
 #  define BAUDS 115200 // Transmission rate
 
-#endif // CONFIG_H_INCLUDED
+#endif