ESP8266 AVR Tutorial (Iot) Part #11 Flash Memory vs RAM - YouTube
RAM | DaleGia
Products | Joy-IT
ESP8266 - Wikipedia
Getting Started with ESP8266 NodeMCU Development Board| Random Nerd Tutorials
Amazon.com: NodeMCU ESP8266 Development Board with 0.96 Inch OLED Display, CH340 Driver, ESP-12E WiFi Wireless Module, and Micro USB Works Great for Arduino IDE/Micropython Programming (Pin Header Soldered) : Electronics
ESP32 vs ESP8266 - Which One To Choose? - ElectronicsHub