6 Pieces of ESP8266 NodeMCU CP2102 ESP-12E Development Boards are Open Source Serial modules, Perfectly Suitable for Arduino IDE/Micropython,and are of Large Size.

Product Description：The ESP8266 is a highly integrated chip engineered for the new interconnected world, offering a comprehensive standalone network solution that enables application hosting or offloading from another application processor.
IDE Setup：Download and install the latest Arduino IDE. Go to File -> Preferences, copy the URL arduino.esp8266.com/stable/package_esp8266com_index.json for the ESP Board Manager extension.
Board Configuration：In the Arduino IDE, navigate to Tools > Board > Board Manager, type "esp8266", download and install the community esp8266. Configure the chip settings: Tools -> Board -> NodeMCU 1.0 (ESP-12E Module), Tools -> Flash Size -> 4M (3M SPIFFS), Tools -> CPU Frequency -> 80 Mhz, Tools -> Upload Speed -> 921600, and Tools --> Port -> (as appropriate).
Flashing Procedure：On Github (search for nodemcu/nodemcu-flasher/tree/master/), visit github.com/nodemcu/nodemcu-flasher/tree/master/Win32/Release or download and run the 64-bit flasher exe from github.com/nodemcu/nodod.emcu-flasemcu-Her/tree/Master/Win64/Release.
Program Execution and Support：In the Arduino IDE, locate the classic Blink program, load, compile, and upload it via File > Examples > ESP8266 > Blink. Contact us if you need drivers or encounter issues, as we offer 100% satisfactory service.

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