diff --git a/ATEMtoNRF/ATEMtoNRF.ino b/ATEMtoNRF/ATEMtoNRF.ino
index c44669c..86bc623 100644
--- a/ATEMtoNRF/ATEMtoNRF.ino
+++ b/ATEMtoNRF/ATEMtoNRF.ino
@@ -6,15 +6,15 @@
 
 //Ethernet
 byte mac[] = {0xAA, 0xDD, 0xBB, 0x10, 0x01, 0x01};
-IPAddress ip(192, 168, 0, 20);
+IPAddress ip(192, 168, 178, 30);
 
 //IP of the ATEM switcher
-ATEM AtemSwitcher(IPAddress(192, 168, 0, 50), 56417);
+ATEM AtemSwitcher(IPAddress(192, 168, 178, 20), 56417);
 
 //tally LEDs
-const int tallyLED[] = {2,3};
-const int tallyLEDlength = 2;
-boolean tallyLEDstat[2];
+const int tallyLED[] = {2,3,4,5};
+const int tallyLEDlength = 4;
+boolean tallyLEDstat[4];
 
 //init NRF
 RF24 radio (7, 8);
@@ -36,13 +36,16 @@ void setup(){
   Ethernet.begin(mac,ip);
 
   //start Serial
-  Serial.begin(9600);  
+  Serial.begin(9600);
+  Serial.println("start serial");
 
   //connect to the switcher
+  Serial.println("connect to ATEM");
   AtemSwitcher.serialOutput(true);
   AtemSwitcher.connect();
 
   //start NRF
+  Serial.println("start NRF");
   radio.begin();
   radio.openWritingPipe(address);
   radio.setPALevel(RF24_PA_MIN);
@@ -59,11 +62,11 @@ void loop(){
   //check for new packages
   AtemSwitcher.runLoop();
 
-  previousTime = currentTime;
   currentTime = millis();
-  
-  if (dataChanged() || currentTime - previousTime >= intervalTime)
+  if (dataChanged() || currentTime - previousTime >= intervalTime){
     sendNRF();
+    previousTime = currentTime;
+  }
 }
 
 void sendNRF(){
@@ -72,24 +75,27 @@ void sendNRF(){
   }
   datasend = datasend << (8 - tallyLEDlength);
   datasend = (datasend << 8) + getChecksum(datasend & 0xFF);
+  Serial.print(" datasend: ");
+  Serial.println(datasend, BIN);
   
   radio.writeFast(&datasend, sizeof(datasend));
 }
 
 boolean dataChanged(){
   boolean changed = false;
+  //Serial.println("tally: ");
   for (int i=0; i < tallyLEDlength; i++){
-    if (AtemSwitcher.getProgramTally(i+1) == tallyLEDstat[i]){
+    if (AtemSwitcher.getProgramTally(i+1) != tallyLEDstat[i]){
       tallyLEDstat[i] = AtemSwitcher.getProgramTally(i+1);
-      digitalWrite(tallyLED[i], !AtemSwitcher.getProgramTally(i+1));
+      digitalWrite(tallyLED[i], tallyLEDstat[i]);
       changed = true;
     }
   }
   return changed;
 }
 
-uint8_t getChecksum(uint8_t data){
-  uint8_t checksum = 0;
-  for (int i=8; i<8; i++) checksum += (data >> i) & 1;
+byte getChecksum(byte data){
+  byte checksum = 0;
+  for (int i=8; i<8; i++) checksum += (data >> i) & B1;
   return checksum;
 }
diff --git a/NRFtoTallylight/NRFtoTallylight.ino b/NRFtoTallylight/NRFtoTallylight.ino
index 19459c3..458f112 100644
--- a/NRFtoTallylight/NRFtoTallylight.ino
+++ b/NRFtoTallylight/NRFtoTallylight.ino
@@ -2,11 +2,11 @@
 #include <nRF24L01.h>
 
 //tally LEDs
-const int tallyLED[] = {2,3};
-const int tallyLEDlength = 2;
-boolean tallyLEDstat[2];
+const int tallyLED[] = {2,3,4,5};
+const int tallyLEDlength = 4;
+boolean tallyLEDstat[4];
 
-# define errorLED 4
+# define errorLED 6
 
 //init NRF
 RF24 radio (7, 8);
@@ -27,12 +27,14 @@ void setup(){
   digitalWrite(errorLED, HIGH);
 
   //start Serial
-  Serial.begin(9600);  
+  Serial.begin(9600);
+  Serial.println("start serial");
 
   //start NRF
+  Serial.println("start NRF");
   radio.begin();
   radio.openReadingPipe(0, address);
-  radio.setPALevel(RF24_PA_MAX);
+  radio.setPALevel(RF24_PA_LOW);
   radio.setDataRate(RF24_1MBPS);
   radio.setAutoAck(false);
   radio.disableCRC();
@@ -44,30 +46,33 @@ void setup(){
 void loop(){
   while (!updateLoop());
   radio.read(&datareceive, sizeof(datareceive));
-  if (getChecksum((datareceive >> 8) & 0xFF) != datareceive & 0xFF){
+  Serial.print("data: ");
+  Serial.println(datareceive, BIN);
+  if (getChecksum((datareceive >> 8) & 0xFF) != (datareceive & 0xFF)){
+    Serial.println("corrupted data");
     digitalWrite(errorLED, HIGH);
-  }else{
-    digitalWrite(errorLED, LOW);
-    for (int i=0; i < tallyLEDlength; i++){
-      digitalWrite(tallyLED[i], (datareceive >> 15 - i) & 1);
-    }
+  }else digitalWrite(errorLED, LOW);
+  for (int i=0; i < tallyLEDlength; i++){
+    digitalWrite(tallyLED[i], (datareceive >> 15 - i) & 1);
   }
 }
 
 boolean updateLoop(){
   currentTime = millis();
   if (radio.available()){
+    Serial.println("new package");
     previousTime = currentTime;
     return true;
   }
   else if (currentTime - previousTime >= errorTime){
+    Serial.println("timeout");
     digitalWrite(errorLED, HIGH);
   }
   return false;
 }
 
-uint8_t getChecksum(uint8_t data){
-  uint8_t checksum = 0;
+byte getChecksum(byte data){
+  byte checksum = 0;
   for (int i=8; i<8; i++) checksum += (data >> i) & 1;
   return checksum;
 }