Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
As we've been integrating the ST25R3916 into our final hardware, there's been an issue with the Adjust Regulators command. On external supply power, the command works without any problems. On some (not all) of our battery-powered units, as tested in ...
I've been working on implementing tag emulation on my device with an ST25R3916 and have run into a problem. First - the code is currently completely separate from the tag reader code, including init, so it's not a matter of not changing modes properl...
Hi AllI am developing a simple app for a bespoke board using the ST25R3911B, that just has to poll for an ST25DV04KC Type 5 tag, and read/write using NDEF. I'm using STM32CubeIDE, adding NFC to an existing project that uses FreeRTOS, and already has ...
We make a credit-card size Data Acquisition device which transfers data over Bluetooth to our iOS or Android App running on a phone which can be optionally attached to the phone. The device has a PIC Microcontroller with an I2C interface and is powe...
We are using the NFC Tag Chip ST25DV04K & ST25DV64K for a customer project. The NFC Antenna is on the same PCB as the Tag Chip. Variant with ST25DV64K, Antenna Size approx 19x44.5mm Variant with ST25DV04K, Antenna Size approx 66.75x24.5mm The antenna...
Hello,I am trying to use RF with iOS and Android to write into the memory of the ST25DV04KC. Reading is not a problem, but the difficulty is the protection. There are two areas: Area 1 is only used for the NDEF message and is locked with Password 1. ...
您好我们使用NFC08A1开发板做NFC识别时，功率无法达到介绍中的1.7W。开始以为是VDD_RF的电压偏低，然后控制寄存器2C的rege将VDD_RF的电压设置为5.1V，使用B区域寄存器2C和万用表读取都没达到5.1V，测量到的最高电压只有4.9V。而且运行直接命令开场后电压降为4.6V。开发板的最高电流只有100mA。排查过供电电源没有功率受限的问题。想问下如何提高功率，期待获取到贵公司的指导。 Hello.When we use the NFC08A1 development boar...
I am looking for an evaluation board for Smart Key/Digital Key application development. Specifically, I need a board that supports NFC, UWB, and BLE with library support. Expecting support to finalize hardware platform
Hey !!I'm new to the world of NFC, and I'm currently developing an application to communicate with a product (connected padlock) as part of my work. I know that we use mailBox for our orders. In practice, to unlock the padlock the command: 35FF1234EE...
Hello, I have a question: Is the NFC technology in the iPhone always active, even if the Wallet app is not in use? I mean, is it always emitting RF radiation to read/write?