Jump to first stage bootloader

[Jstar88]

Hello,
I would like put esp32 in boot mode with a serial command, without the use of en and gpiO0.
In a single core microcontrollor, what i do is to jump to bootloader address.
Is it possible in esp32? Should task and dual core system be handled in special way?

[ESP_igrr]

Boot mode is latched on power-on reset and BOD reset. I don't think it is possible to enter first stage bootloader by software, unless you use an external circuit.

[WiFive]

You might be able to store a copy of the esptool loader in flash and copy it to ram and execute it. Or you could just do OTA over serial.

[Jstar88]

Thanks, i will for OTA way, downloading from uart