> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/rddrone-bms772/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/rddrone-bms772/software-guide-nuttx/how-to-use-nfc.md). # How to use NFC The BMS has an NTAG5 on board to have NFC communication with an NFC enabled device. In the current example an NDEF text record is implemented. This text record has the actual battery information and is updated each measurement time. If the data is read out via NFC, the new updated data cannot be written to the NTAG at the same time. To read the data with NFC, approach the BMS with an NFC enabled mobile phone. It should automatically pop up with the text message after a read, as can been seen in the figure below. An NFC read application could be used as well. If the BMS is in a low power state, the NFC is disabled and it will show some information on the state. If the BMS is in the sleep state, an NFC interaction can be used to wake up the BMS. The following information can be found using an NFC read: * output voltage * Battery current * State of charge * State of health * Output current * Number of charges * Battery id * Model id * Current BMS application state ![](/files/Y6XaqTjiRKZhb23kyoKe) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://nxp.gitbook.io/rddrone-bms772/software-guide-nuttx/how-to-use-nfc.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.