text: #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <assert.h>
  #include <stdint.h>
  #include <inttypes.h>
  
  enum msg {
  	SCAN_MODE,
  	ENROLL_MODE,
  	FOUND_FINGERPRINT
  };
  
  extern uint8_t mode;
  extern uint8_t id;
  char** str_split(char* a_str, const char a_delim);
  int get_params(char *t, char *p);
  int str_to_int(char *str);
  