https://devzone.nordicsemi.com/f/nordic-q-a/17896/how-to-update-program-in-nrf51822-using-nrftoolbox-app-in-android-phoneHiii, Please suggest me how to generate init Packet. I found GATT error when tried to update.en-USTelligent Community 13Tue, 22 Nov 2016 08:48:32 GMThttps://devzone.nordicsemi.com/thread/68990?ContentTypeID=1Tue, 22 Nov 2016 08:48:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d9c8305d-9fa4-44ae-9eb6-8793928555d9bjorn-spockeli<p>Hi Nilesh,</p> <p>you can find information on how to create a firmware image( a zip file containing the firmware and the init packet) on <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/bledfu_example_image.html">this</a> Infocenter page.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>