How can I use psram on esp32-s3-wroom n8r8?
Posted: Fri Jan 02, 2026 1:21 am
I cannot use PSRAM on the ESP32-S3-WROOM-N8R8.
I configured PlatformIO as follows to use the ESP32-S3-WROOM-N8R8:
I then checked PSRAM availability with the following code:
However, the serial output shows:
PSRAM is enabled and available.
PSRAM Size: 0 bytes
ESP32 FREE PSRAM: 0.00KB
The PSRAM size is reported as 0.
I suspected a faulty board, so I replaced it, but the result was the same.
With the N16R8 module, PSRAM works correctly and is detected without any issues.
I also tried configuring and testing the same setup in the Arduino IDE, but the result is identical.
I referred to the following page as well, but it did not solve the problem:
https://github.com/sivar2311/ESP32-Plat ... igurations
What should I do to use PSRAM on the ESP32-S3-WROOM-N8R8?
I configured PlatformIO as follows to use the ESP32-S3-WROOM-N8R8:
Code: Select all
[env:esp32-s3-devkitc-1]
platform = espressif32
; board = esp32-s3-devkitc-1
board = esp32-s3-devkitc1-n8r8
framework = arduino
monitor_speed = 115200
board_build.arduino.memory_type = qio_opi
board_upload.flash_size = 8MB
board_build.partitions = default_8MB.csv
build_flags =
-DBOARD_HAS_PSRAM
; -mfix-esp32-psram-cache-issueI then checked PSRAM availability with the following code:
Code: Select all
if (psramFound()) {
Serial.println("PSRAM is enabled and available.");
} else {
Serial.println("PSRAM is NOT available.");
}
Serial.print("ESP32 PSRAM SIZE: ");
Serial.print(ESP.getPsramSize() / 1024.0, 2);
Serial.println("KB");
Serial.print("ESP32 FREE PSRAM: ");
Serial.print(ESP.getFreePsram() / 1024.0, 2);
Serial.println("KB");However, the serial output shows:
PSRAM is enabled and available.
PSRAM Size: 0 bytes
ESP32 FREE PSRAM: 0.00KB
The PSRAM size is reported as 0.
I suspected a faulty board, so I replaced it, but the result was the same.
With the N16R8 module, PSRAM works correctly and is detected without any issues.
I also tried configuring and testing the same setup in the Arduino IDE, but the result is identical.
I referred to the following page as well, but it did not solve the problem:
https://github.com/sivar2311/ESP32-Plat ... igurations
What should I do to use PSRAM on the ESP32-S3-WROOM-N8R8?