https://devzone.nordicsemi.com/f/nordic-q-a/7077/unexpected-setup-responseHi, I&#39;m trying to build a prototype using the Adafruit nRF8001 Breakout and an mbed ARM CPU. After Reset, I get a Device Started Event, telling me the chip is in Setup mode. I&#39;m then trying to send the first Setup message I&#39;ve got from nRFgoen-USTelligent Community 13Wed, 20 May 2015 12:43:01 GMThttps://devzone.nordicsemi.com/thread/25008?ContentTypeID=1Wed, 20 May 2015 12:43:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d339128-d094-4c25-abf2-bf2cfd29b158xythobuz<p>Problem solved. I simply forgot to read the last byte in my custom ACI code. Thanks again for pointing me in the right direction!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/25007?ContentTypeID=1Mon, 18 May 2015 14:29:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28830927-2770-43de-9500-5bcb322e171brun_ar<p>Have you verified you ACI implementation using the <a href="http:///ble_aci_transport_layer_verification">ble_aci_transport_layer_verification project</a>.(Sending echo commands). If you have verified your implementation could you capture the SPI traffic with a logic analyzer so we can have a look?</p><div style="clear:both;"></div>