PN532 antenna sensitivity from software

[zainali]

Hi,

I am using PN5321A3HN/C106 for user authentication via RFID. I want to increase the sensitivity/reading distance of this module via software (Host controller). I have tried to change "RF Level detector" settings but it has no effect on sensitivity or reading distance.

Is there any parameter available in this module with which we can change the reading distance of the module. I am using I2C as communication interface.

Thanks

[Fabian_R]

Hello sir, thank you for using our products.

Unfortunately, we don't recommend this IC for new designs anymore, we would like you to please check the PN7160. As you may know, the standardized distance for reading is < 10 cm. If the sensitivity isn't enough after modifying the RF level detector. There isn't a lot to do with software.

I would recommend you to please check these antenna design courses: https://www.nxp.com/video/nfc-antenna-design-1-which-antenna-for-what-purpose:WHICH-ANTENNA-PURPOSE-...

And a great addition to this is our NFC Antenna tool. Unfortunately, it is only available for PN7120 and newer products.

Also, there is a great Antenna Design guide for this IC: https://www.nxp.com/docs/en/application-note/AN1445_An1444.zip

I'm sorry for not being able to provide a specific answer regarding your issue.

[zainali]

@Fabian_R 

Thank you for support. I have observed that after setting RF level detector from software, it goes back to its default value after some time. 
Is there any guide or sequence we have to follow to set RF level detector. 

Thanks