Nodemcu basics | blink on board led | #1

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Introduction


  • This is the best program to test on a new node MCU board 
  • It blinks the LED on the  board so other hardware components a re not required
  • This program also helps to check that your board in working fine 

 Step 1: Set up the IDE

  • Download the Arduino IDE.
  •  Install the Arduino IDE and opens it.
  • Go to File > Preferences.
  • Add    http://arduino.esp8266.com/stable/package_esp8266com_index.json to the Additional Board Manager URLs
  • Go to Tool > Boards > Boards Manager.
  • Search for esp8266 and then install the board.
  • Restart the your  Arduino IDE.

Step2: Code

 

/*
 ESP8266 Blink by Simon Peter
 Blink the blue LED on the ESP-01 module
 This example code is in the public domain
 
 The blue LED on the ESP-01 module is connected to GPIO1 
 (which is also the TXD pin; so we cannot use Serial.print() at the same time)
 
 Note that this sketch uses LED_BUILTIN to find the pin with the internal LED
*/

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);     // Initialize the LED_BUILTIN pin as an output
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, LOW);    // Turn the LED on (Note that LOW is the voltage level
                                    // but actually the LED is on; this is because 
                                   // it is acive low on the ESP-01)
  delay(1000);                    // Wait for a second
  digitalWrite(LED_BUILTIN, HIGH);  // Turn the LED off by making the voltage HIGH
  delay(2000);                  // Wait for two seconds (to demonstrate the active low LED)
}

  • Now copy and paste this code in your IDE 
 
Step 3: Uploading the code

  • Now choose the corresponding port and board to your 
  • Now press the upload button


Comment if you face any error in this program


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