ThingMagic M5e-Compact - Manual (Page 208)

Demo Application
208 Appendix B: Getting Started - Devkit
Send a Boot Firmware command to verify that the application FW is running. If the
boot loader is currently running, then a set command will return a 0x0101 status
code, indicating an invalid OpCode.
The parameter(s) to the set command are invalid. If an invalid parameter is sent, then
a 0x0105 status code is returned, indicating an invalid parameter value.
If the wrong number of data elements is used, then a 0x0100 status code (wrong
number of data) is returned. This could be the result of an ill-formed command, or
accidentally using the wrong OpCode.
No Tag ID is Returned
If the Read Tag ID Single command returns an error code of 0x0400 (no tag found), then
most likely it is a set up related issue. Check the following items:
The antenna is properly connected to the unit and configured using the Set Antenna
Port command.
The tag is the right protocol (that is EPC0) and that the protocol has been set using
the Set Current Tag Protocol command.
Try using a longer timeout, such as 30 seconds, and varying the tag’s location in
relation to the antenna.
It is also possible the tag may be erased or damaged. Without a second “known good”
reader, it is difficult to tell if this is the case. If a “known good” tag is available, try to
read it.