https://devzone.nordicsemi.com/f/nordic-q-a/9562/nrf52-dk---radio-not-functionalI am using nrfgo studio ver 1.20.0.2 s132_nrf52_1.0.0-3.alpha_softdevice.hex nrf52832_xx_aa_s132.hex supplied by Nordic (ble_app_template) emIDE 2.20 The firmware runs with the LED flashing every second but no blue tooth at all. I have tried moreen-USTelligent Community 13Mon, 05 Oct 2015 13:14:40 GMThttps://devzone.nordicsemi.com/thread/35314?ContentTypeID=1Mon, 05 Oct 2015 13:14:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ecb6e993-8bd7-4042-8cc3-678f83c36292Susheel Nuguru<p>That cannot be possible, only error codes that this function can return errors starting from 0X2000 or NRF_SUCCESS</p> <p>Can you please check the place where this error code is returned, have you compiled your code with &quot;Level 0&quot; optimizations to enable proper debugging?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/35315?ContentTypeID=1Mon, 05 Oct 2015 10:39:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:96d99971-eaca-4862-b9e4-3b51babbf04fSusheel Nuguru<p>After executing sd_softdevice_enable ending up in app_error_handler means that the call has failed returning an error code (not NRF_SUCCESS). The next line checks the error code <code>APP_ERROR_CHECK</code> and executes app_error_handler if the error code is not NRF_SUCCESS.</p> <p>the documentation says what can go wrong, copy paste from header file is below</p> <pre><code> * @retval ::NRF_SUCCESS * @retval ::NRF_ERROR_INVALID_STATE SoftDevice is already enabled, and the clock source and assertion handler cannot be updated. * @retval ::NRF_ERROR_SDM_INCORRECT_INTERRUPT_CONFIGURATION SoftDeviceinterrupt is already enabled, or an enabled interrupt has an illegal priority level. * @retval ::NRF_ERROR_SDM_LFCLK_SOURCE_UNKNOWN Unknown low frequency clock source selected. </code></pre><div style="clear:both;"></div>