ThingMagic M6e - Manual (Page 58)

Tag Handling
A D I V I S I O N O F T R I M B L E
58 Functionality of the Mercury6e
Note
It is recommended the USB Interface be used when operating the M6e in
continuous reading mode. When the TTL Level UART Interface is used it is not
possible for the module to detect a broken communications interface
connection and stop streaming the tag results.