https://devzone.nordicsemi.com/f/nordic-q-a/65844/unknown-device-compilation-errorI downloaded SDK V17.0.0.9 and opened BLE_APP_UART example from /ble_peripheral folder on IAR EWARM. I choosed ble_app_uart_pca10040e_s112 and compiled without problems. But I want to test the NRF52805, so I changed &quot;NRF52810_XXAA&quot; in preprocesor taben-USTelligent Community 13Mon, 14 Sep 2020 15:09:31 GMThttps://devzone.nordicsemi.com/thread/269448?ContentTypeID=1Mon, 14 Sep 2020 15:09:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:318b2927-6df6-47ae-ae94-acff53fe1652Cristian<p>Thank you Simon!.</p> <p>Now It&#39;s compiling without errors.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/269370?ContentTypeID=1Mon, 14 Sep 2020 12:32:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:931fb97d-3d3d-4341-bace-6ab0d23afc6cSimonr<p>Hi</p> <p>Please check out <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/developing-for-the-nrf52805-with-nrf5-sdk">this guide on &quot;developing for the nRF52805 with nRF5 SDK&quot;</a> by my colleague Bjørn, which describes in detail how you should build a project to make it run as intended on the nRF52805. Some patching of SDK v17.0.0 is required, but this is also described in the guide.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>