https://devzone.nordicsemi.com/f/nordic-q-a/57259/recommended-approach-for-field-upgrade-of-nrf52832-via-uartHello, we are developing a system that will include an nRF52832 in peripheral mode, that will be connected to from a maintenance App (or something) on a mobile phone,and will communicate with our main processor via UART. What we would like to do isen-USTelligent Community 13Mon, 03 Feb 2020 18:00:25 GMThttps://devzone.nordicsemi.com/thread/232418?ContentTypeID=1Mon, 03 Feb 2020 18:00:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67fbb91d-1c59-4ae4-8558-3bb817ceade1riceman0<p>Thank you!&nbsp; Perfect answer, we will research those and follow up.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/232369?ContentTypeID=1Mon, 03 Feb 2020 14:21:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f1230b21-30f5-4a71-a144-8d6b9212a56aEinar Thorsrud<p>Hi,</p> <p>The nRF5 SDK includes a bootloader that can use several transport layers, including UART. I suggest you refer to the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/sdk_app_serial_dfu_bootloader.html">Secure DFU Bootloader over Serial Link (UART/USB)</a>&nbsp;example and the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_bootloader_modules.html">bootloader documentation</a>.</p> <p>Nordic does not provide a UART DFU master implementation in C for your main processor, but you can refer to the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_dfu_transport.html">DFU protocol documentation</a> and some of the other implementations, for instance, this <a href="https://github.com/jimmywong2003/nrf-slim-serial-uart-dfu-host-c-code">unofficial DFU master implementation</a>.</p><div style="clear:both;"></div>