Does arduino code and Wifi run on same processor?

[hyper-iot]

Hi,

On ESP32, which has 2 processors, which processor does arduino code run? Is it same processor that runs WiFi? or do both of these run on different processors?

Thanks and Regards,
Hyper-iot

[oldcurmudgeon]

By default WiFi (and other system code) runs on core 0, Arduino code runs on core 1. If there are user callbacks from core 0 code they also run on core 0. This allows poorly written user code to crash core 0.

[gfvalvo]

@hyper-iot

On ESP32, which has 2 processors

Most, but not all, flavors of ESP32 have two cores. For example, ESP32-S2 is single-core.

@oldcurmudgeon

By default WiFi (and other system code) runs on core 0, Arduino code runs on core 1. If there are user callbacks from core 0 code they also run on core 0.

Callbacks for WiFi events (set with ``WiFi.onEvent()) run on the core selected in the Arduino IDE: