ESP8266 – Wemos D1 Mini

 

Equivalent Pin number / Arduino Digital Pin

WeMos D1 mini Pin Number	Arduino IDE Pin Number
D0	16
D1	5
D2	4
D3	0
D4	2
D5	14
D6	12
D7	13
D8	15
TX	1
RX	3

Usage in source code :

void setup() {
  Serial.begin(115200);
  pinMode(5, OUTPUT); //Digital pin 1 is pin 5 on the ESP8266
}

Or

void setup() {
  Serial.begin(115200);
  pinMode(D1, OUTPUT); //Digital pin 1 is pin 4 on the ESP8266 and D1 as a constant
}