https://devzone.nordicsemi.com/f/nordic-q-a/62493/nfc-tag-write-the-text-record-payload-size-limitationHi, My project is based on SDK15.3 with NRF52840. I have referred to the &quot;writable_ndef_msg&quot; example to read/write the emulated NFC tag successfully. And I can get back the written text string using the below code: Here is some of my initialen-USTelligent Community 13Mon, 22 Jun 2020 07:50:46 GMThttps://devzone.nordicsemi.com/thread/256108?ContentTypeID=1Mon, 22 Jun 2020 07:50:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:05623d3d-5d36-4691-aada-efb18016ccafSusheel Nuguru<p>Hi Andy,</p> <p>Got a reply for the developer of NFC</p> <p>When using <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.0/group__nfc__t4t__lib.html#ga53e5509ed00dcf58e1cf3ad166413147">nfc_t4t_ndef_rwpayload_set()</a> the second parameter defines the maximum allowed size of the NDEF file, not the actual NDEF payload size. So when this is set to 56, no data longer than this can be written by the reader. It should be rather set to the size of a static buffer in RAM reserved for the tag data.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/255069?ContentTypeID=1Mon, 15 Jun 2020 14:39:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9e83acc0-4e1b-4c42-9262-ab49b9ea3cbeAndy Tsai<p>If I didn&#39;t misunderstood, the &#39;nfc_ndef_msg_record_add&#39; method is to prepare record for the mobile&#39;s reading , isn&#39;t it ? But I am </p> <p>am testing the NFC writing (The mobile phone write data to the tag) function, Not to create the tag data for mobile reading.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/254955?ContentTypeID=1Mon, 15 Jun 2020 10:14:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e135e4fb-4776-4458-b017-2fe4a5ddd603Susheel Nuguru[deleted]<div style="clear:both;"></div>