#ifndef COMMAND_H
#define COMMAND
-uint8_t command_proc(void);
+#ifdef COMMAND_ENABLE
+bool command_proc(uint8_t code);
/* This allows to extend commands. Return 0 when command is not processed. */
-uint8_t command_extra(void);
+bool command_extra(uint8_t code);
+#else
+#define command_proc(code) false
+#endif
#endif