DFU example doesn't work. need explain step by step

[Mikhail]

Hi!

nRF52. S132, SDK13.

I try to use ble_dfu_send_hex example.

1. what shoul I do first? via nrf gostudio load SD. correct?

Which SD? from this folder (dfu_test_softdevice_s132) Or usual SD (s132_nrf52_4.0.2_softdevice)

2. what should I do next?

[Mikhail]

I'll try and write.

[Mikhail]

Terefore, you mean that with flash only SD and boot, should be advertise DFUTarg? What about my custom board- there is no cristall- I use RC.

[Mikhail]

When set optimization 0- 149 errors. When return to 3- 0 errors. ?? Answer for my previous question.

[Hung Bui]

Yes, if you don't have crystal, you use RC for the bootloader. I'm not sure why you have to ask, you already mentioned about that above ??

If you see issue, you debug it. That's why I ask how familiar you are with the SDK. The bootloader is not a black box, you can debug and find the reason why it doesn't advertise. It's no different from a normal application.

You have 149 errors could be because the size of the bootloader is bigger than the size allocated for it, you need to increase the size of the bootloader in the project setting. You need to move the bootloader down a little bit to make enough room for it.

Which chip is on your custom board ? we have 2 variant, one with 256kB and one with 512kB flash.

[Mikhail]

About chip, I'll give answer tomorrow. I ask regarding RC because I can't find a place in the boot project where I can change it settings (from qristall to RC). In the SDK i find and changed it. I think, I well good know SDK. But I also can't find place in the boot where set DFUTarg for ex.