Wemos D1 mini pro

Pin   Function 		            ESP-8266 Pin
TX    TXD 			    TXD
RX    RXD 			    RXD
A0    Analog in, max 3.3V  	    A0
D0    IO 			    GPIO16
D1    IO, SCL 		            GPIO5
D2    IO, SDA 		            GPIO4
D3    IO, 10k Pull-up 	            GPIO0
D4    IO, 10k Pull-up, BUILTIN_LED  GPIO2
D5    IO, SCK 		            GPIO14
D6    IO, MISO 		            GPIO12
D7    IO, MOSI 		            GPIO13
D8    IO, 10k Pull-down, SS 	    GPIO15
GND   Ground 			    GND
5V    5V 			    5V
3V3   3.3V 			    3.3V
RST   Reset 			    RST

• red = power
• black = ground
• white = RX (to USB port)
• green = TX (from USB port)

less kern.log –> usb 2-1.5: pl2303 converter now attached to ttyUSB0