diff --git a/src/bme_utils.cpp b/src/bme_utils.cpp
index 2be6fb61..0bf7e9b1 100644
--- a/src/bme_utils.cpp
+++ b/src/bme_utils.cpp
@@ -116,7 +116,7 @@ namespace BME_Utils {
         }
     }
 
-    String generateTempString(float bmeTemp) {
+    const String generateTempString(const float bmeTemp) {
         String strTemp;
         strTemp = String((int)bmeTemp);
         switch (strTemp.length()) {
@@ -131,7 +131,7 @@ namespace BME_Utils {
         }
     }
 
-    String generateHumString(float bmeHum) {
+    const String generateHumString(const float bmeHum) {
         String strHum;
         strHum = String((int)bmeHum);
         switch (strHum.length()) {
@@ -150,7 +150,7 @@ namespace BME_Utils {
         }
     }
 
-    String generatePresString(float bmePress) {
+    const String generatePresString(const float bmePress) {
         String strPress = String((int)bmePress);
         String decPress = String(int((bmePress - int(bmePress)) * 10));
         switch (strPress.length()) {
@@ -169,7 +169,7 @@ namespace BME_Utils {
         }
     }
 
-    String readDataSensor() {
+    const String readDataSensor() {
         String wx, tempStr, humStr, presStr;
         switch (wxModuleType) {
             case 1: // BME280
diff --git a/src/bme_utils.h b/src/bme_utils.h
index 7611ee6b..3a0dfde0 100644
--- a/src/bme_utils.h
+++ b/src/bme_utils.h
@@ -10,12 +10,12 @@
 
 namespace BME_Utils {
 
-    void    getWxModuleAddres();
-    void    setup();
-    String  generateTempString(float bmeTemp);
-    String  generateHumString(float bmeHum);
-    String  generatePresString(float bmePress);
-    String  readDataSensor();
+    void  getWxModuleAddres();
+    void  setup();
+    const String generateTempString(const float bmeTemp);
+    const String generateHumString(const float bmeHum);
+    const String generatePresString(const float bmePress);
+    const String readDataSensor();
 
 }
 
diff --git a/src/lora_utils.cpp b/src/lora_utils.cpp
index 2cbc6506..00e0c8ba 100644
--- a/src/lora_utils.cpp
+++ b/src/lora_utils.cpp
@@ -134,7 +134,7 @@ namespace LoRa_Utils {
         }
     }
 
-    String packetSanitization(const String& packet) {
+    /*String packetSanitization(const String& packet) {
         String sanitizedPacket = packet;
         if (packet.indexOf("\0") > 0) {
             sanitizedPacket.replace("\0", "");
@@ -146,7 +146,7 @@ namespace LoRa_Utils {
             sanitizedPacket.replace("\n", "");
         }
         return sanitizedPacket;
-    }
+    }*/
 
     void startReceive() {
         radio.startReceive();
diff --git a/src/lora_utils.h b/src/lora_utils.h
index f5d09e1d..14578f60 100644
--- a/src/lora_utils.h
+++ b/src/lora_utils.h
@@ -8,7 +8,7 @@ namespace LoRa_Utils {
 
     void    setup();
     void    sendNewPacket(const String& newPacket);
-    String  packetSanitization(const String& packet);
+    //String  packetSanitization(const String& packet);
     String  receivePacket();
     void    changeFreqTx();
     void    changeFreqRx();
diff --git a/src/query_utils.cpp b/src/query_utils.cpp
index 349ab862..76557c56 100644
--- a/src/query_utils.cpp
+++ b/src/query_utils.cpp
@@ -12,7 +12,7 @@ extern int                  freqError;
 
 namespace QUERY_Utils {
 
-    String process(const String& query, const String& station, uint8_t queryOrigin) {
+    String process(const String& query, const String& station, const uint8_t queryOrigin) {
         String answer;
         if (query=="?APRS?" || query=="?aprs?" || query=="?Aprs?" || query=="H" || query=="h" || query=="HELP" || query=="Help" || query=="help" || query=="?") {
             answer = "?APRSV ?APRSP ?APRSL ?APRSH ?WHERE callsign";
diff --git a/src/query_utils.h b/src/query_utils.h
index 136a3d57..1bab7413 100644
--- a/src/query_utils.h
+++ b/src/query_utils.h
@@ -6,7 +6,7 @@
 
 namespace QUERY_Utils {
 
-    String process(const String& query, const String& station, uint8_t queryOrigin);
+    String process(const String& query, const String& station, const uint8_t queryOrigin);
 
 }
 
diff --git a/src/syslog_utils.cpp b/src/syslog_utils.cpp
index 45c93ada..5d49f3e2 100644
--- a/src/syslog_utils.cpp
+++ b/src/syslog_utils.cpp
@@ -11,7 +11,7 @@ WiFiUDP udpClient;
 
 namespace SYSLOG_Utils {
 
-    void log(uint8_t type, const String& packet, int rssi, float snr, int freqError) {
+    void log(const uint8_t type, const String& packet, const int rssi, const float snr, const int freqError) {
         if (Config.syslog.active && WiFi.status() == WL_CONNECTED) {
             String syslogPacket = "<165>1 - ";
             syslogPacket.concat(Config.callsign);
diff --git a/src/syslog_utils.h b/src/syslog_utils.h
index a60d0a24..85e50cc2 100644
--- a/src/syslog_utils.h
+++ b/src/syslog_utils.h
@@ -6,7 +6,7 @@
 
 namespace SYSLOG_Utils {
 
-    void log(uint8_t type ,const String& packet, int rssi, float snr, int freqError);
+    void log(const uint8_t type ,const String& packet, const int rssi, const float snr, const int freqError);
     void setup();
 
 }
diff --git a/src/utils.cpp b/src/utils.cpp
index 2b146d97..96abd6dc 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -66,7 +66,7 @@ namespace Utils {
         }
     }
 
-    String getLocalIP() {
+    const String getLocalIP() {
         if (!WiFiConnected) {
             return "IP :  192.168.4.1";
         } else if (backUpDigiMode) {
@@ -213,7 +213,7 @@ namespace Utils {
         }
     }
 
-    void typeOfPacket(const String& packet, uint8_t packetType) {
+    void typeOfPacket(const String& packet, const uint8_t packetType) {
         String sender = packet.substring(0,packet.indexOf(">"));
         switch (packetType) {
             case 0: // LoRa-APRS
diff --git a/src/utils.h b/src/utils.h
index d7300406..e1d97140 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -14,13 +14,13 @@ class ReceivedPacket {
 namespace Utils {
 
     void    processStatus();
-    String  getLocalIP();
+    const String getLocalIP();
     void    setupDisplay();
     void    activeStations();
     void    checkBeaconInterval();
     void    checkDisplayInterval();
     void    validateFreqs();
-    void    typeOfPacket(const String& packet, uint8_t packetType);
+    void    typeOfPacket(const String& packet, const uint8_t packetType);
     void    print(const String& text);
     void    println(const String& text);
     void    checkRebootMode();