Arduino: fast external SPI Flash memory – Renzo Mischianti
Mais memória no Arduino: indo além dos 2KB de RAM com a PROGMEM
Computo Integrado: Memoria Extra en Arduino
Arduino MEGA 2560 32Kb RAM shield | Hackaday.io
Amazon.com: HiLetgo UNO R3 D1 R32 ESP32 ESP-32 CH340G WiFi+Bluetooth+UNO Development Board WiFi Bluetooth 4MB Flash with Micro USB for Arduino : Electronics
Using SIMMs To Add Some Extra RAM On Your Arduino UNO | Hackaday