What is minimum filesystem size when sector size is 512 bytes?

1- espsecure.py generate_flash_encryption_key acti_flash_encryption_key.bin 2- espefuse.py --port COM155 burn_key flash_encryption acti_flash_encryption_key.bin 3- esptool.py --port COM155 --baud 115200 write_flash 0x10000 ./build/app-template.bin 4- espsecure.py encrypt_flash_data --keyfile acti_fl...

ok, It was exceed more than 4MB Now I reduce it under 4MB # Name, Type, SubType, Offset, Size nvs, data, nvs, 0x9000, 0x4000 otadata, data, ota, 0xd000, 0x2000 phy_init, data, phy, 0xf000, 0x1000 ota_0, app, ota_0, 0x10000, 0x145000 ota_1, app, ota_1, , 0x145000 storage, data, fat, ,0x100000 Still n...

Hi Kolban,

You can doing heap allocation and deallocation at runtime in your C++ class.

for example.

HttpResponse::sendFile


Does this cn cause heap fragmentation on Esp32 after running for long time.

ok, Alignment applies to offset only not size. which is same and correct on all three examples. This works # Name, Type, SubType, Offset, Size nvs, data, nvs, 0x9000, 0x4000 otadata, data, ota, 0xd000, 0x2000 phy_init, data, phy, 0xf000, 0x1000 factory, app, factory, 0x10000, 0x1f0000 storage, data,...

It could be due to alignment issue

This works.
factory, app, factory, 0x10000, 0x1f0000

but this does not. different size.

ota_0, app, ota_0, 0x10000, 0x177000
ota_1, app, ota_1, , 0x177000

Related thread.

https://esp32.com/viewtopic.php?p=24526#p24526

Thanks useful tips.

But this custom partition works. It uses factory . previous one uses two OTA. any idea why?. I want to avoid wasting my space. I need each OTA about 1.5M # Name, Type, SubType, Offset, Size nvs, data, nvs, 0x9000, 0x4000 otadata, data, ota, 0xd000, 0x2000 phy_init, data, phy, 0xf000, 0x1000 factory,...

No debug output.