Thanks for the reply, 1. bootloader with digest is 45056 bytes (0xb000 bytes) + 0x1000 = 0xc000. My partition offset is set to 0xd000, so that shouldn't be a problem right? 2. I haven't changed the key used to create the digest ever, and i can confirm its in re-flashable mode. Is there any futher ac...

Can anyone help?

Hi, The secure boot check is fail with no reason I can think of. Tried 3 boards and all end up in the same state. I've had this working before with no issue, so can't work out what i'm doing wrong now Environment: DevKitC (ESP32-WROOM-32E), Modified version of ESP-AT firmware (based on V2.2.0.0), id...