https://devzone.nordicsemi.com/f/nordic-q-a/31037/tranfer-large-data-from-android-to-nrf52-devkitHi all , I have problem . I have 1 NRF52832 dev kit . It connect to STM32 devkit via UART . I want to tranfer firmware of STM32 from smartphone to NRF via BLE , and from NRF52 to STM32 via UART . But I have trouble at how to tranfer firmware of STM32en-USTelligent Community 13Tue, 06 Mar 2018 14:58:48 GMThttps://devzone.nordicsemi.com/thread/123106?ContentTypeID=1Tue, 06 Mar 2018 14:58:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e159870e-0e7e-46d9-9bc1-4ca69f170f21Mttrinh<p>Hi,</p> <p>I suggest you to take a look at our <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/ble_sdk_app_dfu_bootloader.html?cp=4_0_0_4_4_0" rel="noopener noreferrer" target="_blank">DFU example</a>. You might need to modify&nbsp;<span>it to collect the image in memory and send it out instead of performing a DFU on the nordic chip.&nbsp;</span>Also have a look at <a href="https://devzone.nordicsemi.com/f/nordic-q-a/9131/how-to-upgrade-another-mcu-firmware-by-nordic-n51822-dfu" rel="noopener noreferrer" target="_blank">this</a>&nbsp;and <a href="https://devzone.nordicsemi.com/f/nordic-q-a/5013/updating-firmware-of-external-mcu-via-nrf51422" rel="noopener noreferrer" target="_blank">this</a>&nbsp;post, they might be able to help you.</p> <p></p><div style="clear:both;"></div>