diff --git a/sensor/src/sensor.ino b/sensor/src/sensor.cpp
similarity index 99%
rename from sensor/src/sensor.ino
rename to sensor/src/sensor.cpp
index 91d7d8a..c671b1e 100644
--- a/sensor/src/sensor.ino
+++ b/sensor/src/sensor.cpp
@@ -154,6 +154,31 @@ ArduinoQueue<String> sendBuffer(10);  // TODO: might be better bigger for large
 unsigned long msgStartTime;
 unsigned long timeSinceMsgStart;
 
+String result = "";
+String lastRaw = "";
+String lastRaw2 = "";
+String lastRaw3 = "";
+String lastRaw4 = "";
+String lastRaw5 = "";
+String lastRaw6 = "";
+String lastFB = "";
+String lastJSON = "";
+uint32_t lastUptime = 0;
+String timeString = "";
+int msgLength = 0;
+boolean panelDetected = false;
+const unsigned long readBytesTimeout = 2500; // Timeout in microseconds (2.5 ms)
+
+#include "telnet.h"
+#include "webstatus.h"
+
+byte nibble(char c);
+void hexCharacterStringToBytes(byte* byteArray, const char* hexString);
+void handleMessage(size_t len, uint8_t buf[]);
+String HexString2TimeString(String hexstring);
+String HexString2ASCIIString(String hexstring);
+void sendCommand();
+
 void clearRXbuffer(void) {
         // clear the rx buffer
     #if defined(ESP32) || defined(RSC3)
@@ -522,20 +547,6 @@ void setup() {
     digitalWrite(LED_BUILTIN, LOW);
 }
 
-String result = "";
-String lastRaw = "";
-String lastRaw2 = "";
-String lastRaw3 = "";
-String lastRaw4 = "";
-String lastRaw5 = "";
-String lastRaw6 = "";
-String lastFB = "";
-String lastJSON = "";
-uint32_t lastUptime = 0;
-String timeString = "";
-int msgLength = 0;
-boolean panelDetected = false;
-const unsigned long readBytesTimeout = 2500; // Timeout in microseconds (2.5 ms)
 
 /*
  * waitforGLBytes checks the first byte in the serial buffer
@@ -1002,10 +1013,7 @@ void hexCharacterStringToBytes(byte* byteArray, const char* hexString) {
 
 byte nibble(char c) {
     if (c >= '0' && c <= '9') return c - '0';
-
     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
-
     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
-
     return 0;  // Not a valid hexadecimal character
 }
diff --git a/sensor/src/telnet.ino b/sensor/src/telnet.h
similarity index 100%
rename from sensor/src/telnet.ino
rename to sensor/src/telnet.h
diff --git a/sensor/src/webserver.ino b/sensor/src/webstatus.h
similarity index 99%
rename from sensor/src/webserver.ino
rename to sensor/src/webstatus.h
index 6481686..2caccc2 100644
--- a/sensor/src/webserver.ino
+++ b/sensor/src/webstatus.h
@@ -15,6 +15,10 @@ void handleSend() {
     sendBuffer.enqueue(message);
 }
 
+String getStatusJSON() {
+  return "{\"type\": \"status\", \"data\" : { \"temp\": \"" + String(tubTemp,1) + "\", \"heater\": " + (heaterState ? "true" : "false") + ", \"light\": " + (lightState ? "true" : "false") + ", \"mode\": \""+tubMode.getCurrentState()+"\", \"uptime\": " + lastUptime + ", \"state\": \"" + state + "\" } }";
+}
+
 void webSocketEvent(uint8_t num, WStype_t type, uint8_t * payload, size_t length) {
 
   switch (type) {
@@ -44,6 +48,3 @@ void webSocketEvent(uint8_t num, WStype_t type, uint8_t * payload, size_t length
 
 }
 
-String getStatusJSON() {
-  return "{\"type\": \"status\", \"data\" : { \"temp\": \"" + String(tubTemp,1) + "\", \"heater\": " + (heaterState ? "true" : "false") + ", \"light\": " + (lightState ? "true" : "false") + ", \"mode\": \""+tubMode.getCurrentState()+"\", \"uptime\": " + lastUptime + ", \"state\": \"" + state + "\" } }";
-}