nRF52810 running BLE HCI over SPIhttps://devzone.nordicsemi.com/f/nordic-q-a/123256/nrf52810-running-ble-hci-over-spiHI all So currently we are researching the following configuration. We have a main MCU running Zephyr RTOS and its connected to nRF52810 over SPI. Ideally we would like to se option to use nordic as HCI. I found example for BLE HCI SPI in NRF Connecten-USTelligent Community 13Fri, 25 Jul 2025 15:42:34 GMTRE: nRF52810 running BLE HCI over SPIhttps://devzone.nordicsemi.com/thread/543637?ContentTypeID=1Fri, 25 Jul 2025 15:42:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:027f88d2-a5a5-40b8-820b-081ded510c4bmojangeex<p>Thanks, lowering maximum number of concurrent connections solved the issue.</p><div style="clear:both;"></div>RE: nRF52810 running BLE HCI over SPIhttps://devzone.nordicsemi.com/thread/543598?ContentTypeID=1Fri, 25 Jul 2025 11:12:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54da1f37-1b26-40b8-98f5-49290d18e431Vidar Berg<p>Hi,</p> <p>The sample is configured to support 16 concurrent connections by default which requires a significant amount of RAM. Try to reduce the&nbsp;CONFIG_BT_MAX_CONN setting in the project configuration file (prj.conf) and see if that helps. The project will include the Softdevice controller if you&#39;re using the nRF connect SDK (you can confirm it is selected from the .config output).</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>