Let’s compare versions and types of NodeMCU ESP8266 Boards. There are two versions in the market NodeMCU V2 and V3. Both, NodeMCU has ESP8266 microcontroller on the board. The major difference is of USB-to-UART interface chip and the size. The NodeMCU Version 2 uses CP2102 and Version 3 uses CH340 chip. Apart from this Version 3 of NodeMCU is slightly bigger in size compare to version 2.

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