https://devzone.nordicsemi.com/f/nordic-q-a/19450/hci-dfu-custom-pcb-bugHi everyone, I am trying to update my nrf52832 chip with another MCU using UART. I am using the bootloader example dual_bank_serial_s132 with the s132 SoftDevice. I have tested it on the DK and everything works fine but when I do it on my customen-USTelligent Community 13Mon, 06 Feb 2017 13:50:29 GMThttps://devzone.nordicsemi.com/thread/75554?ContentTypeID=1Mon, 06 Feb 2017 13:50:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:43307b5c-874f-4696-8acb-adc3142f35c8bjorn-spockeli<p>You&#39;re not the first! :) Glad to hear that you found the cause of the issue!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75553?ContentTypeID=1Mon, 06 Feb 2017 13:43:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf674035-6add-456b-b60a-b816a916895aPY<p>Update: That was my bad, I am not using externall ocillator so I had to modify my clock source in ble_stack_init() function.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75552?ContentTypeID=1Mon, 06 Feb 2017 11:59:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd0ba719-8e70-4b62-b53b-91fde199b0e5bjorn-spockeli<p>Hi PY, which SDK version are you using? Have you enabled Hardware Flow Control (HWFC)? Do you have a schematic showing the interface between the other MCU and the nRF52 on the custom board?</p><div style="clear:both;"></div>