info

• ESP32-S3-DevKitC-1-N16R8.json - this is board description file for ESP32-S3-WROOM-1-N16R8 16 MB (Quad SPI) 8 MB (Octal SPI) documentation or local
• default_16MB.csv this is basic partition file with minimum 3.5Mb spiffs file system and with two 6.5Mb bytes for app0 and app1
• How to create partition file

• schematic

Other

• You can find other partition files this
• And other board description files this

Instrustions

1. move all this files to {ProjectPath} / boards
2. edit platformio.ini file:

; Flash: 16MB QD, PSRAM: 8MB OT
[env:ESP32-S3-DevKitC-1-N16R8]
platform = espressif32
board = ESP32-S3-DevKitC-1-N16R8 ; 16 MB Flash, 8MB octo PSRAM
framework = arduino


monitor_speed = 115200

Test code

#include "Arduino.h"

#define BOOTLOG( ... ) { char buf[120]; sprintf( buf, __VA_ARGS__ ) ; Serial.print("##[BOOT]#\t"); Serial.println(buf); }

void setup() {
  Serial.begin(115200);
}

void loop() {

  BOOTLOG("Total heap: %d", ESP.getHeapSize());
  BOOTLOG("Free heap: %d", ESP.getFreeHeap());
  BOOTLOG("Total PSRAM: %d", ESP.getPsramSize());
  BOOTLOG("Free PSRAM: %d", ESP.getFreePsram());
  delay(1000);
}

Monitor

RAM:   [=         ]  14.6% (used 47780 bytes from 327680 bytes)
Flash: [=         ]  11.0% (used 720281 bytes from 6553600 bytes)

##[BOOT]#       Total heap: 365636  
##[BOOT]#       Free heap: 304228   
##[BOOT]#       Total PSRAM: 8386231
##[BOOT]#       Free PSRAM: 8385851 

Działa!!!!