Get Started With ESP8266 (NodeMCU Lolin V3)

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

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 "http://arduino.esp8266.com/stable/package_esp8266com_index.json" 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).

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

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.