ST25R95 detect ST25D tag

[Eyzeryong]

I use ST25R95 to detect the ST25D tag. I keep the tag on the antenna of the Reader all the time, and some situations have occurred.

Hi

Even if I place it precisely on it all the time, the tag may not be read probabilistically during detection. Is this normal? The antenna fails to read the tag about two or three times out of ten readings.

Please help me,thanks~

[Brian TIDAL]

Hi,

do you use your own custom board or one of the ST demo boards (if yes, which one)? 

What is the sequence of command being sent and what is the return code in case of failure? I would suggest to connect a logic analyzer on SPI + IRQ_IN and IRQ_OUT and provide the trace file.

Rgds

BT