RE: HID Keyboard with DFU

Yinbun Ye — Tue, 24 Nov 2020 08:02:52 GMT

Thank you.

RE: HID Keyboard with DFU

Einar Thorsrud — Thu, 19 Nov 2020 12:50:59 GMT

Hi,

First of all, the nRf52810 has a quite small flash, so it may not be possible to do DFU even of the app. In order to do it you need to fit the bootloader in addition to the application and SoftDevice. That may be possible, but it is a tight fit.

[quote user=""]I have tried unbonded and bonded，both are not work.[/quote]

I recommend using unbonded unless you have a compelling reason for requiring bonding. That is simpler and you avoid a few pitfalls. (You can still require bonding in order to write to the DFU characteristic in the application to put the device in DFU mode, which often makes sense.)

[quote user=""]

Return the error is as follow

ERROR 8 [NRF_ERROR_INVALID_STATE] at ble_dfu_buttonless_init

[/quote]

This typically happens if you call ble_dfu_buttonless_init() before pm_init(), as the peer manager needs to be initialized first.