Wednesday, October 23, 2019

How to use NodeMCU-32S Lua (ESP32) serial2 port (UART)

 NodeMCU-32S Lua have 3 UART. serial0 ,serial1, serial2.

serial  RX TX
0  GPIO3 GPIO1 
1 GPIO9 GPIO10
2  GPIO16 GPIO17


If ESP32 connect USB,only serial2 can work.
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