Add further includes.

wled00/wled.cpp

@@ -1,4 +1,5 @@
 #include "wled.h"
+#include <Arduino.h>
 #include "wled_led.h"
 #include "wled_ir.h"
 #include "wled_notify.h"

wled00/wled_blynk.cpp

@@ -1,6 +1,9 @@
 #include "wled_blynk.h"
+#include "const.h"
 #include "wled.h"
 #include "src/dependencies/blynk/Blynk/BlynkHandlers.h"
+#include "wled_led.h"
+#include "wled_colors.h"
 
 uint16_t blHue = 0;
 byte blSat = 255;

wled00/wled_ir.cpp

@@ -1,5 +1,8 @@
 #include "wled_ir.h"
 #include "wled.h"
+#include "wled_led.h"
+#include "wled_colors.h"
+#include "wled_eeprom.h"
 
 #if defined(WLED_DISABLE_INFRARED)
 void handleIR(){}
@@ -34,7 +37,7 @@ bool decodeIRCustom(uint32_t code)
 
 
 //relatively change brightness, minumum A=5
-void relativeChange(byte* property, int8_t amount, byte lowerBoundary = 0, byte higherBoundary = 0xFF)
+void relativeChange(byte* property, int8_t amount, byte lowerBoundary, byte higherBoundary)
 {
   int16_t new_val = (int16_t) *property + amount;
   if (new_val > higherBoundary) new_val = higherBoundary;

wled00/wled_ir.h

@@ -1,9 +1,24 @@
 #ifndef WLED_IR_H
 #define WLED_IR_H
+#include <Arduino.h>
 /*
  * Infrared sensor support for generic 24/40/44 key RGB remotes
  */
 
+bool decodeIRCustom(uint32_t code);
+void relativeChange(byte* property, int8_t amount, byte lowerBoundary = 0, byte higherBoundary = 0xFF);
+void changeEffectSpeed(int8_t amount);
+void changeEffectIntensity(int8_t amount);
+void decodeIR(uint32_t code);
+void decodeIR24(uint32_t code);
+void decodeIR24OLD(uint32_t code);
+void decodeIR24CT(uint32_t code);
+void decodeIR40(uint32_t code);
+void decodeIR44(uint32_t code);
+void decodeIR21(uint32_t code);
+void decodeIR6(uint32_t code);
+
+void initIR();
 void handleIR();
 
 #endif //WLED_IR_H