When you connect the WeMOS D1 mini board for the first time on your Windows computer through a USB cable, it might be the case to install a USB-to-SERIAL driver. The board has a USB-to-SERIAL converter (CH340 chip). The driver is
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Programming your D1mini ESP8266 in ArduinoIDE: use Arduino IDE 1.6.5 check your aditional board URL from file->preferences
check D1 mini board The actual pins on the board: Pin Function ESP-8266 Pin TX TXD TXD RX RXD RXD A0 Analog
Diagram and pinout for version v1.0.0 Pin Pin Function ESP-8266 Pin TX TXD TXD RX RXD RXD A0 Analog input, max 3.3V input A0 D0 IO GPIO16 D1 IO, SCL GPIO5 D2 IO, SDA GPIO4 D3 IO,10k Pull-up GPIO0 D4
The D1 mini is a mini wifi board based on ESP-8266EX from WeMos.cc.
If you are using a NodeMCU firmware on you ESP take note on the GPIO table mapping. All access is based on the I/O index number on the NodeMCU dev kits, not the internal GPIO pin.
This is a ESP8266 NodeMCU board from LoLin.
ESP8266-EVB from OLIMEX IS EVALUATION BOARD FOR ESP8266 WITH RELAY, BUTTON, UEXT, ALL GPIOS AVAILABLE ON 0.1″ HEADER ESP8266 is very highly integrated SOC which includes Xtensa LX106 core processor, RAM, RF front end and allow WIFI TCP-IP stack to be implemented
The ESP8266 from Espressif is a highly integrated chip designed for the needs of an increasingly connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host applications or offload all Wi-Fi networking functions from
Raspberry Pi 2 Model B GPIO 40 Pin Block Pinout Source element14