Question

Connect NodeMCU to Arduino, write codes on Arduino to make the LED on NodeMCU do the followings:

Using your NodeMCU, write a program to blink the onboard LED in a particular pattern:

First, turn the LED on for one second, then off for one second.

Then, blink the LED five times – on for 200ms, and off for 200ms. (Use a for loop.)

Finally, turn the LED on for half a second, then off for half a second.

Loop this behavior three times, then turn the LED off and stop.

Answer 1

#define LED D0 // Led in NodeMCU at pin GPIO16 (D0).
void setup() {
pinMode(LED, OUTPUT); // LED pin as output.
}

int count=0;
void loop() {

if(count<3)

{
digitalWrite(LED, HIGH);// turn the LED off.(Note that LOW is the voltage level but actually
//the LED is on; this is because it is acive low on the ESP8266.
delay(1000); // wait for 1 second.
digitalWrite(LED, LOW); // turn the LED on.
delay(1000); // wait for 1 second.

for(int i=0;i<5;i++)

{

digitalWrite(LED, HIGH);// turn the LED off.(Note that LOW is the voltage level but actually
//the LED is on; this is because it is acive low on the ESP8266.
delay(200); // wait for 200 ms
digitalWrite(LED, LOW); // turn the LED on.

delay(200); // wait for 200ms

}

digitalWrite(LED, HIGH);// turn the LED off.(Note that LOW is the voltage level but actually
//the LED is on; this is because it is acive low on the ESP8266.
delay(500); // wait for 1 second.
digitalWrite(LED, LOW); // turn the LED on.
delay(500); // wait for 1 second.

count++;

}
}