Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Dear NFC Forum Community, we have recently developed a circuit design using one of STMicro’s latest NFC chips (e.g. ST25R200 as their most recent reader IC). We are very interested in having this design validated under NFC Forum conformance testing. ...
The last few lines of StMicro’s ST25DV-I2C low power application note (high lighted) are ambiguous. Does “ST25DV-I2C” have the ability to read/write EEPROM without power applied between pins VDCG and GND? (YES/NO) Our desired application needs to ...
Hello We are preparing the following modes for the authentication test. 1) Unmodulated signal continuous output (typo corrected!) 2) Modulated signal continuous output 3) Adjust each signal output dB 1 and 3 have been resolved, and we are having di...
Hello,I recently added ST25R3916B to a board. I followed the evaluation board schematic pretty closely. During board "bring up" phase I had an issue where the osc_ok bit in `Auxiliary display register` was stuck low. Specifically, after powering u...
We are using NUCLEO-WB55 evaluation board + X-NUCLEO-NFC07A1 NFC tag, we downloaded your OOB demo kit STSW-ST25DV013 from https://www.st.com/en/embedded-software/stsw-st25dv013.html, followed your instructions to program the .BIN to evaluation board...
Hello ST Community, Our company is preparing to begin a project segment for our mobile application that would involve switching to the ST25TV NFC chip specifically for its anti-cloning protection features. I am not a developer myself, but I would...
Hello,I'm using RFAL with the ST25R3916 to emulate NDEF tags.The tag emulation works perfectly.Now, I'd like to get the RSSI when the emulated tag is read.My problem is that rfalGetTransceiveRSSI() and even the low evel st25r3916GetRSSI() always retu...
Hello,I’m working with an ST25R3916 and an ESP32-S3. I ported the RFAL library to the ESP32 (platform.c), and it works — I can successfully read a tag with this setup.However, I’m struggling to emulate a tag in order to send an NDEF message.Does anyo...
Hello everyone!This is my first time trying to use the ST25R chip. After struggling with the datasheet, I was referred to the RFAL library and the UM2890 manual.However, I couldn't find clear step-by-step instructions.:backhand_index_pointing_right:...
Is there any way to get an antenna working in reader mode (chip 3911) when placed very close to a metal surface (around 2–3 mm)?I did some experiments with NFC in modern smartphones — their antennas sit right on top of the battery surface, and everyt...