ESP32 (different versions) boot time

[zyghom]

Hi,

I'm using ESP32S and ESP32-S2 in my projects and I realised that in the simple sketch, where I only print millis() in setup, the figures shown by these two modules are totally different.

• ESP32S: 21ms

• ESP32-S2: 279ms

and btw both are totally wrong.

What is the reason for that? Because using millis() to estimate how long the devices was ON (i.e. before going to sleep) is almost impossible.

I am just curious so if someone knows, if this is Arduino issue or ESP32 issue

thx