https://devzone.nordicsemi.com/f/nordic-q-a/5483/nrf8001-setupHey, I&#39;m working on integrating nrf8001 with STM32, currently trying to write my own stack. Upon reset, I read the DeviceStartedEvent, 0x81 and it shows &quot;0x02 0x00 0x02&quot;, which should mean the device is in the SETUP-state, correct? After this,en-USTelligent Community 13Sat, 27 Jun 2015 05:02:10 GMThttps://devzone.nordicsemi.com/thread/19142?ContentTypeID=1Sat, 27 Jun 2015 05:02:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cfdf7713-3115-4f62-8af1-bd674f6d89degumi_krak<p>You get ACI_STATUS_ERROR_BUSY, maybe you don’t wait for device ready status on REDYN line? You should have something like this before you write a command ioport_set_pin_level ( REQN, 0 ); while(1 == ioport_get_pin_level (REDYN)) ;</p> <p>Or SPI frequency is too high. Anyway, SPI sniffer or oscilloscope is very useful thing. Oscilloscope help me many times, when I make own device.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19141?ContentTypeID=1Fri, 26 Jun 2015 17:09:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:794be6e3-e639-4388-b8b3-34227af6f770vivyadavalli<p>Mika, I had exactly same issue when doing the nrf8001 on STM32 did you fix this or made any further progress? in my case nrf8001 would very rarely 1/20 times mysteriously wakeup and come to standby and let us connect, for every other time your pattern above happens. Do you know how to fix this Any help would be highly appreciated.</p><div style="clear:both;"></div>