https://devzone.nordicsemi.com/f/nordic-q-a/29625/ttl-converter-nrf52832-qfaa-r7-qfn48Hello. I have a ttl converter ( https://goo.gl/images/uFSPHN) . Can I write a hex file through it? What are the possibilities to program so as not to buy a debug card?en-USTelligent Community 13Mon, 22 Jan 2018 15:18:44 GMThttps://devzone.nordicsemi.com/thread/117679?ContentTypeID=1Mon, 22 Jan 2018 15:18:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7b8ed527-51c4-45d5-9c6a-ffd9a495a748MartinBL<p>Hi,</p> <p>It is possible to program an nRF5 device over UART, but it requires that the device has already been programmed with a bootloader that can handle the incoming FW image. In the Nordic world we call it Device Firmware Upgrade (DFU) and you can do it over BLE or serial interfaces (like UART). Here is some <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/sdk_app_serial_dfu_bootloader.html?cp=4_0_0_4_4_2">documentation and examples</a> showing who to do serial DFU.</p> <p>If you are asking whether you can use that dongle to program an nRF5 device out of the box the answer is no.</p><div style="clear:both;"></div>