Krake Memory Size Sketch,

[ForrestErickson]

Memory Size on ESP32,

Asked an AI:

Is there a sketch to load to test the allowed code size on my ESP32 WROOM?

Memory Reporting Code

It came back with this code:

/*
ESP32_CODE_SIZE
*/

#include <Arduino.h>
#include "esp_ota_ops.h" // For partition info

void setup() {
  Serial.begin(115200);
  delay(2000); // Wait for Serial Monitor

  Serial.println("\n--- ESP32 Flash & Partition Report ---");

  // 1. Total Physical Flash Size
  uint32_t flashSize = ESP.getFlashChipSize();
  Serial.printf("Total Physical Flash: %u bytes (%.2f MB)\n", 
                flashSize, flashSize / (1024.0 * 1024.0));

  // 2. Current App Partition Size (The "Allowed" Code Size)
  const esp_partition_t* running = esp_ota_get_running_partition();
  if (running != NULL) {
    Serial.printf("Current App Partition Label: %s\n", running->label);
    Serial.printf("Allowed Code Size: %u bytes (%.2f MB)\n", 
                  running->size, running->size / (1024.0 * 1024.0));
  }

  // 3. Current Code Usage
  uint32_t sketchSize = ESP.getSketchSize();
  uint32_t freeSpace = ESP.getFreeSketchSpace();
  Serial.printf("Current Sketch Size: %u bytes\n", sketchSize);
  Serial.printf("Remaining Space in Partition: %u bytes\n", freeSpace);

  Serial.println("---------------------------------------\n");
}

void loop() {
  // Do nothing
}

The Code Ran and Reported

ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4832
load:0x40078000,len:16460
load:0x40080400,len:4
load:0x40080404,len:3504
entry 0x400805cc

--- ESP32 Flash & Partition Report ---
Total Physical Flash: 4194304 bytes (4.00 MB)
Current App Partition Label: app0
Allowed Code Size: 1310720 bytes (1.25 MB)
Current Sketch Size: 288464 bytes
Remaining Space in Partition: 1310720 bytes
---------------------------------------