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Published 20 hours ago • verified publisher icon shariltumin

Reducing boot-time

Open davefes opened this issue 7 months ago • 0 comments

At a rough guess it is taking my camera (2024 version) about 2 seconds to come out of deepsleep until the image is captured.

@glenn20 https://github.com/glenn20/upy-esp32-experiments/tree/main/OptimisingMicropythonBootTime has done investigations into ways of reducing boot time.

A: Reduce time to boot to app_main(): has been done in mainline, but don't know if it is included in your 2024 firmware.

B: Execute app (deepsleep reboot) from frozen _boot.py module: seems a worthwhile modification which the user can build in themselves.

C: Skip nvs_flash_init() on boot if waking from deepsleep: I want WiFi, but maybe it could be done after the image has been captured.

D: Skip initialisation of SPIRAM on boot if waking from deepsleep: Maybe relevant.

Interested in your comments about reducing boot-time. If B: gives the biggest improvement maybe I need to have another attempt at freezing my app_main.

Thank you.

davefes avatar Jul 21 '24 22:07 davefes