+#include <ev.h>
+
+// reader open parameters, see uFR manual
+#define UFR_READER_TYPE 1 // uFR type (1Mbps)
+#define UFR_PORT_INTERFACE 1 // serial; auto->ftdi->FAIL
+#define UFR_PORT_NAME "/dev/ttyUSB0" // reader device
+#define UFR_ASYNC_BAUD_RATE 1000000 // 1Mbps, otherwise UFR_COMMUNICATION_BREAK
+
+#define UFR_BEEP // define this to annoy people
+
+typedef struct ev_io_ufr {
+ ev_io w; // fd watcher
+ char uid_data[24]; // store uid here (uid is 10 bytes max)
+ char *uid; // current position in uid_data
+ int fd; // PORT_NAME file descriptor
+} ev_io_ufr;
+
+typedef struct mt_rfid_t {
+ ev_io_ufr w; // reader watcher
+ int fd; // print JSON output here