Why can't I write to the sram on the NTAG I2C PLUS card?

[macondo1]

In an application created from the nxp code for android I can write perfectly in the sram, but in ios I can't.

I have obtained version V3 of the NTAG I2C Demo application for ios that was in an nxp forum, this application manages to compile perfectly but when trying it it does nothing, it does not work. I have tried to transfer these methods to swift and do it through the NFCCore library, but the I2C does not work.

https://community.nxp.com/t5/NFC-Knowledge-Base/NTAG-I2C-Demo-iOS-source-code-sharing/ta-p/1225337

A write and read of an ndef register works fine, even reading the configuration registers to check that passthrough is enabled.

I would like to be able to obtain a newer version or be clear that this function cannot be performed on iOS.

Thank you

[SimonFilgis]

Dear NXP Team,

why is there no support for iPhone any more? It is a new chip and iPone has 50% market share.

I'm interested in understanding what is missing. If there is a chance to make it work, I would like to give it a try. Could you please check with the team if there is a limitation on iOS that will prevent the code from working for sure, or if there is just no reccource availible on your side.

Best,

Simon

[KaiLi · Accepted solution]

Hello @macondo1 

Thanks for contacting us and interested in the NXP products.
After consulting with the relevant team, there is no official NXP application for NTAG I2C Plus running on iPhone. Officially only the app that runs on Android.

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