allow access to buffer

src/logger.cpp

@@ -63,3 +63,7 @@ void logger_clear(){
     buffer[0]=0;
     SPIFFS.remove("/log.txt");
 }
+
+char* logger_get_buff(){
+    return buffer;
+}

src/logger.h

@@ -10,5 +10,6 @@ void logger(byte level, const char* format, ...);
 long logger_get_size();
 void logger_clear();
 void logger_dump(Print *dest);
+char* logger_get_buff();
 
 #endif