https://devzone.nordicsemi.com/f/nordic-q-a/18954/ble-serialization-getting-startedAfter failing in replacing a Cortex M4 for a NRF52832 I&#39;m studying the possibility of using a NRF51822 as a BLE controller, used by my Cortex M4 MCU. As I saw there is serialization support through SPI, UART and &quot;reliable UART&quot; (HCI), all I need toen-USTelligent Community 13Fri, 13 Jan 2017 09:59:52 GMThttps://devzone.nordicsemi.com/thread/73266?ContentTypeID=1Fri, 13 Jan 2017 09:59:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f8505e1d-9ccf-42a9-a61f-0917522cdecaHung Bui<p>Hi Ricardo,</p> <p>We removed the serialization example in SDK v12 and added back in SDK v12.2 (but support for nRF51 is removed).</p> <p>I would suggest you to use SDK v11 if you want to use nRF51 as the connectivity chip. Note that nRF52 is more power efficient and &quot;future proof&quot; with new BLE 5.0 features.</p> <p>To use the serialization please follow <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/nrf51_setups_serialization.html?cp=4_0_3_1_4">this instruction</a>. The example is located at \examples\ble_central_and_peripheral\ble_connectivity</p> <p>May I ask the reason you couldn&#39;t replace the CortexM4 MCU with the nRF52832 as the nRF52832 is also an Cortex M4F ?Any timing requirement ?</p><div style="clear:both;"></div>