ThingMagic Autonomous Configuration Tool - Manual (Page 25)

Processing Data from the Reader
Autonomous Configuration Tool v1.0 User Guide 25
Temperature Status Message
A Temperature Status Message will be returned approximately every 250ms (this will vary
based on the Region setting used as it depends on the internal frequency hopping
algorithm which is dependent on the region of operation).
When using Read On GPI Trigger mode the temperature status message is used as a
keep-alive when GPI is low (reading is turned off).
Table 6: Temperature Status Packet Format
Message Example
A sample temperature status message indicating a temperature of 29C:
Field Value Description
Header (Hdr) 0xFF Defines the start of the packet.
Data Length (Len) 0x0A Defines the length, M, of the data field contained in the
packet. Length can be 0 – 248 bytes
OpCode 0x22 Autonomous reader message
Status Word 0x0000 Should not receive non-0x0000 status.
RFU [9 bytes] Reserved for future use. Data can be ignored
Temperature [1 byte] Internal temperature of the module in degrees Celcius.
Note: If temperature exceeds 85C the module will begin
throttling reading and return 0x0504 status in
Read-
Cycle Reset/Keep-Alive messages.
CRC-16
Checksum [2 bytes] See CCITT CRC-16 Calculation .
FF 0A 22 00 00 00031b028200820001 1D B7 71
SOH Length OpCode Status Word RFU Temperature CRC