diff --git a/platformio.ini b/platformio.ini
index 011cb75..11e09ce 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -52,28 +52,29 @@ monitor_speed = 115200
 
 
 build_flags=
-    '-D CLIENT_ID="hydroponic-DB"'
-    -D PIN_BUTTON
+    '-D CLIENT_ID="hydroponic-Test"'
+    -D PIN_BUTTON=12
 
-    -D EC_PIN_RELAY_PROBE
-    -D EC_PIN_FREQ
+    -D EC_PIN_RELAY_PROBE=6
+    -D EC_PIN_FREQ=5
     
     -D EC_CALIBRATION_POLYNOM={8.718380956513695,-0.026463423062356713,3.425216464107108e-05,-4.069826379094172e-09,2.478900495960682e-13}
     -D EC_CALIBRATION_LINEARIZE_BELOW_ADC=2000
     -D EC_CALIBRATION_LINEAR_LOWADC=728
     -D EC_CALIBRATION_LINEAR_LOWEC=0
 
-    -D FLOW_PIN
-    -D ONE_WIRE_BUS_PIN
+    -D FLOW_PIN=16
+    -D ONE_WIRE_BUS_PIN=18
     -D THERMOMETER_ADDR_RESERVOIR={0x28,0xFF,0x30,0xBA,0x85,0x16,0x03,0xB5}
-    -D THERMOMETER_ADDR_CASE
+    -D THERMOMETER_ADDR_CASE={0x28,0xFF,0x30,0xBA,0x85,0x16,0x03,0xB6}
 
-    -D PIN_SDA
-    -D PIN_SCL
+    -D PIN_SDA=1
+    -D PIN_SCL=2
 
 lib_deps =
     https://github.com/milesburton/Arduino-Temperature-Control-Library/
     https://github.com/emilv/ArduinoSort/
     robtillaart/ADS1X15@^0.3.9
     256dpi/MQTT@^2.5.2
-    pololu/VL53L0X@^1.3.1
\ No newline at end of file
+    pololu/VL53L0X@^1.3.1
+    adafruit/Adafruit NeoPixel
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 58bc852..4620c3f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -48,14 +48,36 @@ ADS1115 ADS(0x48);
 //#include "soilmoisture.h"
 
 
-
+#ifdef PIN_NEOPIXEL
+#include <Adafruit_NeoPixel.h>
+Adafruit_NeoPixel pixels(1, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
+#endif
 
 
 
 void setup() {
   pinMode(PIN_BUTTON,INPUT_PULLUP);
+#ifdef PIN_LED
   pinMode(PIN_LED,OUTPUT);
   digitalWrite(PIN_LED,LOW);
+#endif
+
+
+
+#if defined(NEOPIXEL_POWER)
+  // If this board has a power control pin, we must set it to output and high
+  // in order to enable the NeoPixels. We put this in an #if defined so it can
+  // be reused for other boards without compilation errors
+  pinMode(NEOPIXEL_POWER, OUTPUT);
+  digitalWrite(NEOPIXEL_POWER, HIGH);
+#endif
+#ifdef PIN_NEOPIXEL
+  pixels.begin();
+  pixels.setBrightness(100); // not so bright
+  pixels.clear();
+#endif
+
+
   Serial.begin(115200);
   if (mqtt) {
     WiFi.begin(ssid, pass);
@@ -66,7 +88,7 @@ void setup() {
 
 
   Serial.println("Setup Waterlevel");
-  //waterlevel_setup(); //Temporarily disabled
+  waterlevel_setup();
 
 
   //init ADS1115
@@ -127,7 +149,7 @@ void loop() {
   temperature_loop(loopmillis);
   
   if (!ec_measurementRunning()){ //skip tof read when ec measurement running, because vlxx sensor reading takes quite long per cycle
-     //Temporarily disabled waterlevel_loop(loopmillis);
+     waterlevel_loop(loopmillis);
   }
 
   flow_loop(loopmillis);
@@ -141,17 +163,35 @@ void loop() {
     if (!digitalRead(PIN_BUTTON)) { //button pressed
       valueError=false;
       Serial.println("Reset ValueError flag by user");
+#ifdef PIN_LED
       digitalWrite(PIN_LED,valueError); //set led before delay to blink if error persists
+#endif
+#ifdef PIN_NEOPIXEL
+      pixels.setPixelColor(0, pixels.Color(255*valueError, 0,0));
+      pixels.show();
+#endif
       delay(100);
     }
 
     static bool last_valueError=true;
     if (!valuesStabilized) { //if values are not okay since boot
+#ifdef PIN_LED
       digitalWrite(PIN_LED,(loopmillis/250)%2==0); //blink led
+#endif
+#ifdef PIN_NEOPIXEL
+      pixels.setPixelColor(0, pixels.Color((loopmillis/250)%2==0,(loopmillis/250)%2==0,0));
+      pixels.show();
+#endif
     }else{ //LED shows valueError flag status when values were okay once
       if (last_valueError!=valueError) { //update led if valueerror flag changed
         last_valueError=valueError;
+#ifdef PIN_LED
         digitalWrite(PIN_LED,valueError);
+#endif
+#ifdef PIN_NEOPIXEL
+      pixels.setPixelColor(0, pixels.Color((loopmillis/250)%2==0,(loopmillis/250)%2==0,0));
+      pixels.show();
+#endif
       }
     }
   }
@@ -162,16 +202,32 @@ void loop() {
   if (eccalibrationoutput && !digitalRead(PIN_BUTTON) && !getReading) { //Calibration UI
     if (!isValueArrayOK(ec_calib_array,EC_CALIB_ARRAY_SIZE,EC_ADC_UNAVAILABLE)) {
       for (uint8_t blink=0;blink<5;blink++) {
+#ifdef PIN_LED
         digitalWrite(PIN_LED,HIGH);
         delay(100);
         digitalWrite(PIN_LED,LOW);
         delay(100);
+#endif
+#ifdef PIN_NEOPIXEL
+        pixels.setPixelColor(0, pixels.Color(0,0,255));
+        pixels.show();
+        delay(100);
+        pixels.setPixelColor(0, pixels.Color(0,0,0));
+        pixels.show();
+        delay(100);
+#endif
       }
     }else{
       getReading=true;
       force_ec_measurement=true;
       ec_flag_measurement_available=false;
+#ifdef PIN_LED
       digitalWrite(PIN_LED,HIGH);
+#endif
+#ifdef PIN_NEOPIXEL
+        pixels.setPixelColor(0, pixels.Color(0,255,0));
+        pixels.show();
+#endif
     }
   }
 
@@ -180,7 +236,13 @@ void loop() {
     
     ec_flag_measurement_available=false;
     getReading=false;
+#ifdef PIN_LED
     digitalWrite(PIN_LED,LOW);
+#endif
+#ifdef PIN_NEOPIXEL
+        pixels.setPixelColor(0, pixels.Color(0,0,0));
+        pixels.show();
+#endif
     Serial.print(loopmillis); Serial.print(",");
     Serial.print(tempCmean_reservoir); Serial.print(",");
     Serial.print(ec_calib_adc); Serial.print(",");