This post had a discussion on using one button but the first reply suggested a buttonless solution. So now I'm not sure if one button dfu is best if same button is used for reset and wake. Which sequence is recommended, 1) remove the coin battery, press and hold button, insert battery, release button, enter DFU, 2) hold button for a number of seconds, enter DFU, 3) or buttonless DFU. The intended design for nRF52810 is to use P0.21/RESET as that one button.
That post and some other posts (18968, 22612, 28527, 33875) make mention of using the BOOTLOADER_BUTTON. I can find references of how to use that pin here SDK_14.2.0_nRF52810_Secure_BL_v1.1.zip but when searching sdk 15.0 examples only the experimental ant_bootloader has that pin. Is this to understand that from sdk 15.0 going forward buttonless is the recommended option for secure BL?
-thank-you
