ESP32-S2-WROVER question

bridger6649
Posts: 4
Joined: Thu Feb 03, 2022 3:23 am

ESP32-S2-WROVER question

Postby bridger6649 » Wed Feb 23, 2022 3:53 am

I have a custom board with an ESP32-S2-WROVER module. (Board and parts sourced from JLCPCB).

REPL etc. all works fine.

When I flash it with new firmware, the initial output is as follows:
esptool.py v3.2-dev
Serial port /dev/cu.usbserial-143401
Connecting....
Chip is ESP32-S2
Features: WiFi, No Embedded Flash, No Embedded PSRAM, ADC and temperature sensor calibration in BLK2 of efuse V2
Crystal is 40MHz
MAC: 58:cf:79:38:7a:3c
According to its datasheet, the ESP32-S2-WROVER has 4MB of flash and 2MB of PSRAM.

That being the case, why does the Features line say: "No Embedded Flash, No Embedded PSRAM"?

Can anyone shed some light on this?

Thanks!
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WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: ESP32-S2-WROVER question

Postby WiFive » Wed Feb 23, 2022 5:00 am

Some chips have flash and psram embedded inside the same package. It is one chip with multiple dies inside. A module like ESP32-S2-WROVER has separate chips for esp32-s2, flash, and psram on a small pcb. So ESP32-S2-WROVER does have flash and psram but it is not considered embedded flash.

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