https://devzone.nordicsemi.com/f/nordic-q-a/59947/change-bootloader-start-address-nrf5sdk160098a08e2Hi, I need the bigger the size of bootloader. So I changed IROM1 0x78000 0x6000 to IROM1 0x77000 0x7000.But nrf_dfu_transports_init returned error code after I changed the IROM1.How can I change the size of bootloader?en-USTelligent Community 13Wed, 08 Apr 2020 11:34:25 GMThttps://devzone.nordicsemi.com/thread/244063?ContentTypeID=1Wed, 08 Apr 2020 11:34:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7708dec4-5596-4112-89aa-cd509ec14f41Edvin<p>Hello,</p> <p>It should be possible to change the start address. What does&nbsp;<span>nrf_dfu_transports_init() return? Did you check the init() function(s) that you are using? Is it the USB, UART or BLE init function that asserts?</span></p> <p><span></span></p> <p><span>BR,</span></p> <p><span>Edvin</span></p><div style="clear:both;"></div>