diff --git a/include/waterlevel.h b/include/waterlevel.h
index 9c6c1a7..ffe51c3 100644
--- a/include/waterlevel.h
+++ b/include/waterlevel.h
@@ -23,8 +23,9 @@ float watervolume=WATERLEVEL_UNAVAILABLE; //calculated Volume in Reservoir
 
 
 //Calibration
-float waterlevel_calib_offset_measured=0; //Sollwert
-float waterlevel_calib_offset_sensor=0; //Istwert
+float waterlevel_calib_offset_measured=86; //Sollwert
+float waterlevel_calib_offset_sensor=78; //Istwert
+//raw reading is 78mm, ruler reads 86mm. VL8160 sensor is 169mm above bottom of reservoir.
 
 float waterlevel_calib_reservoirArea=27*36.5; //area in cm^2
 
@@ -32,8 +33,15 @@ float waterlevel_calib_reservoirArea=27*36.5; //area in cm^2
 float waterlevel_heightToVolume(float distance);
 
 
+mqttValueTiming timing_waterlevel;
+
 void waterlevel_setup() {
 
+  timing_waterlevel.minchange=0.0;
+  timing_waterlevel.maxchange=3.0;
+  timing_waterlevel.mintime=30*000;
+  timing_waterlevel.maxtime=60*60*1000;
+
   Wire.begin();
 
   sensor.init();
@@ -65,12 +73,12 @@ void waterlevel_loop(unsigned long loopmillis) {
     }
 
     if (isValueArrayOKf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVEL_UNAVAILABLE)){
-      //float _distance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVELMEAN_FILTER_CUTOFF);
-      float _distance=getMaxf(waterlevelMean_array,WATERLEVELMEAN_SIZE);
+      float _filteredDistance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVELMEAN_FILTER_CUTOFF);
+      
 
       //Invert distance and offset
-      waterlevel=distance-(waterlevel_calib_offset_sensor+waterlevel_calib_offset_measured);
-      watervolume=waterlevel_heightToVolume(_distance);
+      waterlevel=(waterlevel_calib_offset_sensor+waterlevel_calib_offset_measured)-_filteredDistance;
+      watervolume=waterlevel_heightToVolume(waterlevel);
 
       //float _meanWaterlevel=getMeanf(waterlevelMean,WATERLEVELMEAN_SIZE);
       //Serial.print("\t Dist="); Serial.print(_filteredWaterlevel); Serial.print("mm"); Serial.print("(+- "); Serial.print((getMaxf(waterlevelMean,WATERLEVELMEAN_SIZE)-getMinf(waterlevelMean,WATERLEVELMEAN_SIZE))/2.0); Serial.print(")"); Serial.print(" [mean="); Serial.print(_meanWaterlevel); Serial.print("]"); 
diff --git a/include/wifi_functions.h b/include/wifi_functions.h
index cb6954b..0cabfbd 100644
--- a/include/wifi_functions.h
+++ b/include/wifi_functions.h
@@ -29,7 +29,7 @@ bool enableTiming=true;
 
 
 
-void publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis);
+bool publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis);
 void publishValue(String topic,float value,uint8_t decimals);
 
 void connect() {
@@ -97,7 +97,7 @@ bool mqtt_loop(unsigned long loopmillis) {
     return false;
 }
 
-void publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis) {
+bool publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis) {
     unsigned long timediff=loopmillis-mqttvt.lasttime;
     float valuediff=abs(value-mqttvt.lastvalue);
     valuediff=constrain(valuediff,mqttvt.minchange,mqttvt.maxchange);
@@ -110,7 +110,9 @@ void publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming
         mqttvt.lasttime=loopmillis;
         mqttvt.lastvalue=value;
         publishValue(topic,value,decimals);
+        return true;
     }
+    return false;
 }
 
 void publishValue(String topic,float value,uint8_t decimals) {
diff --git a/messung/approximate.py b/messung/approximate.py
index 92df6eb..cc4caf4 100644
--- a/messung/approximate.py
+++ b/messung/approximate.py
@@ -8,7 +8,7 @@ import matplotlib.pyplot as plt
 from pandas import *
  
 # reading CSV file
-data = read_csv("20230509_NaCl_raw.csv")
+data = read_csv("20230620_NaCl_raw.csv")
  
 # converting column data to list
 #solutionAdded = data['solutionAdded'].tolist() #in ml
diff --git a/src/main.cpp b/src/main.cpp
index da6be82..da71d13 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,7 +5,7 @@
 #include "wifi_functions.h"
 
 bool debug=true; //print Serial information
-bool mqtt=false;
+bool mqtt=true;
 bool eccalibrationoutput=false; //serial output for ec calibration
 
 
@@ -262,6 +262,13 @@ void loop() {
       }
       
       publishValueTimed("flow/flow",flow,2,timing_flow,loopmillis); 
+
+      if (waterlevel!=WATERLEVEL_UNAVAILABLE) {
+        bool _published=publishValueTimed("waterlevel/height",waterlevel,2,timing_waterlevel,loopmillis); 
+        if (_published) { //use height for timing. send calculated volume with it
+          publishValue("waterlevel/volume",watervolume,2);
+        }
+      }
       
 
       if (ec_flag_measurement_available){