Introduction: Get Started With ESP8266 (NodeMCU Lolin V3)

About: someone who likes electronics

Component Required:

  • ESP8266 (NodeMCU Lolin V3)
  • Micro USB
  • Arduino IDE
  • Internet connection

NodeMCU lolin V3 Feature:

  • Open-source
  • Status LED
  • MicroUSB port
  • Interactive and Programmable
  • Low cost
  • ESP8266 with inbuilt wifi
  • USB to UART converter
  • GPIO pins

Step 1: Add ESP8266 to Arduino IDE

this is a way to add the NodeMCU lolin V3 board to the Arduino IDE:

  1. Open Arduino IDE.
  2. Click File > Preference.
  3. Add This URL "" to Additional Board Manager URLs.
  4. Go to Tools > Board > Board Manager.
  5. Wait until the update is complete.
  6. Search esp8266 by ESP8266 Comunity, then install, wait until the installation is complete.
  7. After it finishes, Go to Tools > Board > NodeMCU 1.0 (ESP-12E Module).

Step 2: Port on NodeMCU Lolin V3

To use a Port on NodeMCU, it is different from Arduino.

An example is the use of "pinMode ()"

To make Port D5 on Arduino as Output, the code will be like this:

pinMode(5, OUTPUT);

And to make the D5 port on NodeMCU lolin V3 as Outout, the code will be like this:

pinMode(D5, OUTPUT)

If you don't write the full port address when using NodeMCU lolin V3. What will be detected in the program is Port of ESP-12E which is in the Node.

See pictures for more details

Step 3: Example Sketch

NodeMCU lolin V3 has LEDs installed on it. The led is connected to Port D4. I will use these LEDs for example sketch.

Example Sketch:

#define LEDpin D4 //set led pin

// the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LEDpin, OUTPUT); }

// the loop function runs over and over again forever void loop() { digitalWrite(LEDpin, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(LEDpin, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }

Based on the example sketch that I made. LEDs will flash once every second.