Where can I find the information about Heltec ESP32 LoRa V2 RTC GPIOs?

Where can I find the information about Heltec ESP32 LoRa V2 RTC GPIOs?

I need this information to be able to make a sketch with External Wake Up from Deep Sleep.

The Espressif ESP32 Dev Kit V1 has RTC to GPIOS: 0,2,4,12,13,14,15,25,26,27,32,33,34,35,36,39
For the Heltex ESP32 LoRa V2 I tested some pins as 36, 39, etc… and they didn’t work for External Wake Up from Deep Sleep.

Hi,
Please refer to:

OK, thank you.

I understood this, but this NOTE, as I tested, is only valid for ESP32, not for Heltec WiFi LoRa 32(V2).

NOTE:

Only RTC IO can be used as a source for external wake
source. They are pins: 0,2,4,12-15,25-27,32-39.

That is why I asked specifically for the case of this Heltec.

Is there this information (RTC GPIO) specifically for Heltec WiFi LoRa 32 (V2)?

Besta Regards

Antonio Gagno