How to issue a ManageGPO RF command to a particular tag?

[IMoun]

When I'm trying to send a ManageGPO RF command to activate GPO on a particular tag, the GPO is being triggered on any tag or on all tags within the reach of the reader (I use CR95HF for develompent), despite the fact I set UID and an address flag as follows:

22 A9 02 [UID] 00/01

The tag with the UID specified in the command responds with code 0x80 (success), other tags do not respond (devkit software provides code 0x8700 : Frame wait time out OR no tag) but GPO on those other tags is still being set/unset.

GPO_CTRL and GPO_CTRL_Dyn registers are set to RF_USER 0x81

[JL. Lebon · Accepted solution]

​Hello,

Please see my answer to the "ST25DVXX Android SDK: com.st.st25sdk.type5.st25dv.ST25DVTag.manageGpoCommand(ST25DVTag.GpoCommand cmd, byte flag) how to use in addressed mode" question. Looks like this is related.

https://community.st.com/s/question/0D70X0000075rij/st25dvxx-android-sdk-comstst25sdktype5st25dvst25dvtagmanagegpocommandst25dvtaggpocommand-cmd-byte-flag-how-to-use-in-addressed-mode?s1oid=00Db0000000YtG6&t=1567780413771&s1nid=0DB0X000000DYbd&emkind=chatterCommentNotification&s1uid=0050X000007vxA3&...

Best regards.