OTA example getting 'stuck' on loading subtype 0x11 (OTA App #2)

[jnorgan]

I was using the OTA example code and after two OTAs, it was getting stuck loading only the second OTA app (subtype 0x11). It looks like the sequence value for A was incremented to 0x00000003 and since the bootloader is using the following:

esp-idf/components/bootloader/subproject/main/bootloader_start.c

Line 332 in 9da1bf1

return MAX(sa.ota_seq, sb.ota_seq) - 1;

get_selected_boot_partition() continues to return 2 and the bootloader loads OTA App #2 instead of cycling back to load the first slot.

I haven't dug into the ota_ops code enough to contribute a proper fix. I'm doing a hacky return (MAX(sa.ota_seq, sb.ota_seq) - 1) % 2; in the above bootloader code, but this can't be the correct fix for this.

Anyone able to help on this?

[negativekelvin]

#955

[jnorgan]

👍 Yep. That's exactly it. Sorry for the duplicate.