This is a nice little chip info tool that I've created some time ago.
When building with `-D WLED_DEBUG`, it reports some interesting information about your ESP32 on serial monitor.
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====================================
Chip info for ESP32-D0WDQ5
SDK: v4.4.1-472-gc9140caf8c
------------------------------------
XTAL FREQ: 40 MHz
APB FREQ: 80.0 MHz
CPU FREQ: 240 MHz
ESP32 DEVICE: ESP32-D0WD-V3 rev.3, 2 core(s), 240MHz.
Chip feature flags: 0b110010
* 0b0000010 Chip has 2.4GHz WiFi
* 0b0001000 Chip has Bluetooth LE
* 0b0010000 Chip has Bluetooth Classic
FLASH CHIP FREQ (magic): 80.0 MHz
FLASH SIZE (magic byte): 4.00 MB
FLASH MODE (magic byte): 2 ; 0=QIO, 1=QOUT, 2=DIO, 3=DOUT or other
FLASH CHIP ID: 0x16405E
FLASH CHIP FREQ: 80.0 MHz
FLASH REAL SIZE: 4.00 MB
FLASH REAL MODE: DIO
------------------------------------
RAM HEAP SIZE: 261.79 KB
FREE RAM: 232.57 KB
MAX RAM alloc: 107.99 KB
ESP32 PSRAM: found.
* SPI RAM Chip availeable: 64MBits = 8MBytes
total PSRAM: 4094 KB
FREE PSRAM: 4093.89 KB
MAX PSRAM alloc:4031.99 KB
used PSRAM: 0 Bytes
* PSRAM free after malloc / ps_malloc : 2833.85 KB
* Can allocate big memory with ps_malloc()
* Can allocate big memory with malloc()
CPU #0 - last reset reason = 1 POWERON_RESET => Vbat power on reset
CPU #1 - last reset reason = 14 EXT_CPU_RESET => APP CPU reset by PRO CPU
====================================
````
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