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Connect ESP8266 to Wi-Fi Router Upload these code to your Arduino WeMos D1 ESP8266 W-Fi board. #include <ESP8266WiFi.h> //SSID of your network char ssid[] = " myRouter"; //SSID of your Wi-Fi router char pass[] = " myPassWord"; //Password of your Wi-Fi router void setup() {   Serial.begin(115200);   delay(10);   // Connect to Wi-Fi network   Serial.println();   Serial.println();   Serial.print("Connecting to...");   Serial.println(ssid);   WiFi.begin(ssid, pass);   while ( WiFi.status() != WL_CONNECTED) {     delay(500);     Serial.print(".");   }   Serial.println("");   Serial.println("Wi-Fi connected successfully"); } void loop ( ) {} Using ESP8266 to connect to Wi-Fi need to use the function of: WiFi.begin(ssid, pass); // connect to target Wi-Fi SSID is the name of the Wi-Fi you want to connect to.  while ( ...

  First Look at Arduino D1 board Recently, I got the Arduino D1 board with ESP 8266 Wifi chip on it for about 8 USD. Instead of using ATmega 328, it’s an ESP8266-based Wi-Fi enable microprocessor. It also comes with 11 digital input/output pins , 1 analog input , micro usb connect and power jack which can be supplied with 9-24V of power input. Board connection ( CH340G) This board use CH340G USB to UART chip for USB connection  If you find your computer cannot recognize the device when you first plug in the D1 board, please try to download and install the CH340 drive for the USB to UART connection. CH340 USB to UART driver https://www.wemos.cc/downloads My Video of CH340 driver installation process https://www.youtube.com/watch?v=oCZJbKoni6M& The advantage of this integrated board is that it can be programmed like an Arduino, but with the ability to do some wireless data transmitting things. How fantastic it is to have such an affordable Wi-Fi b...