ST95HF responds with 0x87 whenever I send REQA

[Aditya1]

I'm trying to communicate with a tag that has a chip FM11RF08.

Following are the sequence of commands I send to ST95HF

>> 0x02 02 02 00 <-------------Select Protocol

<< 0x0000

>> 0x04 02 26 07 <------------REQA

<< 0x8700

When, I checked the datasheet it says 0x87 "Frame wait time out (no valid reception)".

Please, help me to debug this issue@, correct me if i have missed something.

Hardware used:

• In-house designed PCB, that includes 16 bit MCU with ST95HF
• PCB Antenna, 1.86uH @ 13.56MHz

Software setup:

• SPI communication with ST95HF
• I'm my own handler code for ST95HF

Tag used:

@Brian TIDAL_O​ 

[Brian TIDAL · Accepted solution]

HI,

I would suggest to

• check that this tag is not malfunctioning by reading it with another reader (e.g. a smartphone with NFC support)
• check that the reader is properly working with a reference ISO14443A tag such as ST25TA tag

Rgds

BT