diff --git a/components/ratgdo/ratgdo.cpp b/components/ratgdo/ratgdo.cpp
index 332ab9b..46a066d 100644
--- a/components/ratgdo/ratgdo.cpp
+++ b/components/ratgdo/ratgdo.cpp
@@ -19,20 +19,20 @@ namespace ratgdo {
 
     static const char* const TAG = "ratgdo";
     /*** Static Codes ***/
-    static const byte SYNC1[] = { 0x55, 0x01, 0x00, 0x61, 0x12, 0x49, 0x2c, 0x92, 0x5b, 0x24,
+    static const unsigned char SYNC1[] = { 0x55, 0x01, 0x00, 0x61, 0x12, 0x49, 0x2c, 0x92, 0x5b, 0x24,
         0x96, 0x86, 0x0b, 0x65, 0x96, 0xd9, 0x8f, 0x26, 0x4a };
-    static const byte SYNC2[] = { 0x55, 0x01, 0x00, 0x08, 0x34, 0x93, 0x49, 0xb4, 0x92, 0x4d,
+    static const unsigned char SYNC2[] = { 0x55, 0x01, 0x00, 0x08, 0x34, 0x93, 0x49, 0xb4, 0x92, 0x4d,
         0x20, 0x26, 0x1b, 0x4d, 0xb4, 0xdb, 0xad, 0x76, 0x93 };
-    static const byte SYNC3[] = { 0x55, 0x01, 0x00, 0x06, 0x1b, 0x2c, 0xbf, 0x4b, 0x6d, 0xb6,
+    static const unsigned char SYNC3[] = { 0x55, 0x01, 0x00, 0x06, 0x1b, 0x2c, 0xbf, 0x4b, 0x6d, 0xb6,
         0x4b, 0x18, 0x20, 0x92, 0x09, 0x20, 0xf2, 0x11, 0x2c };
-    static const byte SYNC4[] = { 0x55, 0x01, 0x00, 0x95, 0x29, 0x36, 0x91, 0x29, 0x36, 0x9a,
+    static const unsigned char SYNC4[] = { 0x55, 0x01, 0x00, 0x95, 0x29, 0x36, 0x91, 0x29, 0x36, 0x9a,
         0x69, 0x05, 0x2f, 0xbe, 0xdf, 0x6d, 0x16, 0xcb, 0xe7 };
-    static const byte* SYNC_CODE[] = { SYNC1, SYNC2, SYNC3, SYNC4 };
+    static const unsigned char* SYNC_CODE[] = { SYNC1, SYNC2, SYNC3, SYNC4 };
 
-    static const byte DOOR_CODE[] = { 0x55, 0x01, 0x00, 0x94, 0x3f, 0xef, 0xbc, 0xfb, 0x7f, 0xbe,
+    static const unsigned char  DOOR_CODE[] = { 0x55, 0x01, 0x00, 0x94, 0x3f, 0xef, 0xbc, 0xfb, 0x7f, 0xbe,
         0xfc, 0xa6, 0x1a, 0x4d, 0xa6, 0xda, 0x8d, 0x36, 0xb3 };
 
-    static const byte LIGHT_CODE[] = { 0x55, 0x01, 0x00, 0x94, 0x3f, 0xef, 0xbc, 0xfb, 0x7f, 0xbe,
+    static const unsigned char  LIGHT_CODE[] = { 0x55, 0x01, 0x00, 0x94, 0x3f, 0xef, 0xbc, 0xfb, 0x7f, 0xbe,
         0xff, 0xa6, 0x1a, 0x4d, 0xa6, 0xda, 0x8d, 0x76, 0xb1 };
 
     void RATGDOComponent::setup()
@@ -412,7 +412,7 @@ namespace ratgdo {
      * The opener requires a specific duration low/high pulse before it will accept
      * a message
      */
-    void RATGDOComponent::transmit(byte* payload, unsigned int length)
+    void RATGDOComponent::transmit(unsigned char * payload, unsigned int length)
     {
         digitalWrite(OUTPUT_GDO, HIGH); // pull the line high for 1305 micros so the
                                         // door opener responds to the message