Review on 📶 MakerFocus 2pcs ESP8266 NodeMCU LUA CP2102 ESP-12E Internet WiFi Development Board - Serial Wireless Module - Internet for Arduino IDE/Micropython - Includes Free Adapter Board for ESP8266 ESP-01 and nRF24L01+ by Wendy Kennedy

These boards are incredibly profitable! The built-in Wi-Fi makes creating IoT projects extremely easy. There are a few issues I struggled with initially: - The pin numbers are a bit confusing, if you're programming with the Arduino IDE, paste this code at the top of your sketch. to convert the Dx pin numbers printed on the board to pin numbers that the Arduino recognizes. data)#define D3 0#define D4 2 // Like "LED_BUILTIN", but with inverted logic#define D5 14 // SPI SCK Bus (clock)#define D6 12 // SPI MISO Bus#define D7 13 // SPI MOSI bus#define D8 15 // SPI SS (CS) bus#define D9 3 // RX0 (serial console)#define D10 1 // TX0 (serial console) - also V3 boards are too wide for use on standard width of the breadboard. Using two breadboards side by side can solve this problem and get enough space for your projects. Attached is a photo showing how I did it.