https://devzone.nordicsemi.com/f/nordic-q-a/52108/nrf905-chipThe nRF905 chip can be setup to different payload length. 0-31 byte Must RX and TX unit be setup to same payload length or can RX unit be setup to ex. 20 bytes and TX unit to 10 bytes. Issue is that TX unit payload length can be variable to haveen-USTelligent Community 13Mon, 16 Sep 2019 16:12:42 GMThttps://devzone.nordicsemi.com/thread/209904?ContentTypeID=1Mon, 16 Sep 2019 16:12:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eafac88e-d290-4e86-bd44-d5f3a6819d84Kenneth<p>Hi,</p> <p>It only support fixed length,&nbsp;so you need to pad the remaining data with &#39;0&#39;s to fill the length as required by the receiver.</p> <p>Kenneth</p><div style="clear:both;"></div>