NTAG 5 Switch

[Vince40]

Hello, I am working on a personal project involving the NTAG 5 Switch. I would like to know whether the NTAG 5 Switch can automatically report a change in the state of its GPIO input to an RFID reader, without the reader having to poll the tag first. If so, what is the minimum achievable latency between the activation/deactivation of the GPIO input and the transmission of this information via RFID?

The intended application is a gaming keyboard, so very low and predictable latency is important.

[Fabian_R]

Hello sir,

Please take a look at NTAG 5 - Use of PWM, GPIO and event detection section 3, where is mentioned the Input modes and Registers. Still, the state is saved in NTAG 5's memory. The NFC reader will need to read the exposed memory of the GPIO state. Unfortunately, this status is subject to the reader.