Differences between WeMOS and UNO pin numbering


The table below shows the mapping between the UNO pins, the pins on generic 4 relay shields, the ESP8266, and the WeMOS UNO clone for you info.

UNO Relay on Shield ESP8266 IO Index ESP8266 Pin WeMOS IOL/IOL1
PD4 4 2 GPIO4 D2
PD5 3 3 GPIO0 D3
PD6 2 4 GPIO2 D4
PD7 1 5 GPIO14 D5

 

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