ESP32 Wrover DevKit Board with 4MB RAM, compatible with Arduino IDE (WiFi Module & Bluetooth, successor to the NodeMCU ESP8266) with Pinout and Tutorials in English : Amazon.nl: Electronics & Photo
ESP-WROOM-32 and extending the flash - ESP32 Forum
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222 More Memory for the ESP32 without Soldering (How-to adapt partition sizes) - YouTube
Amazon.com: 3D Printer Motherboard ESP32 WiFi 240MHz MCU 520Kb RAM 3D Printer Main Control Board for MKS TinyBee MINI12864,Convenient 2 Way Controllable Fan 3D Printer Controllers Accessories : Industrial & Scientific
ESP32 Programmers' Memory Model. Internal memory of the MCU is probably… | by Amey Inamdar | The ESP Journal
New! Esp32-wrover Esp-32 Esp-32s 4mb Ram Module Core Cpu With Low Power Consumption - Demo Board Accessories - AliExpress
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Use PSRAM
How to use 4Mb external PSRAM on ESP32 WROVER module.? - ESP32 Forum