https://devzone.nordicsemi.com/f/nordic-q-a/39337/bug-in-nrfx_uarte---size-of-tx-truncated-to-8-bitsSDK 15.2 The nrfx_uarte_event_t callback contains a nrfx_uarte_xfer_evt_t; structure, this structure has the bytes field as a uint8_t this should be a uint16_t to support NRF52840 (TX)|RX MAXCNT register of 16 bits minor but wrong!en-USTelligent Community 13Thu, 11 Oct 2018 15:11:53 GMThttps://devzone.nordicsemi.com/thread/152542?ContentTypeID=1Thu, 11 Oct 2018 15:11:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c02247d2-75e9-4b6f-975d-bccb56897d25Simon<p>Thanks for letting us know. The bug is now is now reported.</p><div style="clear:both;"></div>