nodeMCU wifi 연결

 

#include <ESP8266WiFi.h>
#include <Ticker.h>

#define LED     D0    //LED PIN define
#define KEY_IN  D3    //Flash key pin define
#define ANALOG_IN A0  //analog in define

Ticker flipper1;
Ticker flipper2;

const char *ssid =  "ssid";     // replace with your wifi ssid and wpa2 key
const char *pass =  "password";

 

WiFiClient client;

 

unsigned int prt_index = 0;
unsigned char led_flag = 0;

void flip_test();
void led_test();

// the setup function runs once when you press reset or power the board
void setup() {
  Serial.begin(115200);
  delay(10);
 
  Serial.println("Start..");

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED, OUTPUT);
  pinMode(KEY_IN, INPUT);   // == pinMode(KEY_IN, INPUT);

  Serial.println("Connecting to ");
  Serial.println(ssid);

 

  WiFi.begin(ssid, pass);
 
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");

 

  Serial.print("MAC: ");
  Serial.println(WiFi.macAddress());

 

  flipper1.attach(0.3, flip_test);    //start , ms
  flipper2.attach(0.5, led_test);       //start , ms

  //flipper.detach(); //stop
}

 

// the loop function runs over and over again forever
void loop() {

  int buttonState = digitalRead(KEY_IN);
  if (buttonState == 0)
  {
    Serial.printf("button key input !! \n");
  }
}

 

 

//-------------------
void flip_test()
{
  int inputA_val = analogRead(ANALOG_IN);
 
  prt_index ++;
  //Serial.printf("%d",prt_index);
  switch (prt_index % 4)
  {
    case 0:
      Serial.printf("^");
      break;

    case 1:
      Serial.printf("-");
      break;

    case 2:
      Serial.printf("^");
      break;

    case 3:
      Serial.printf("; , B: %d \n", inputA_val);
      break;
  }
}

 

 

//--------------------
void led_test()
{
  if (led_flag)
  {
    led_flag = 0;
    digitalWrite(LED, LOW);    // turn the LED off by making the voltage LOW
  }
  else
  {
    led_flag = 1;
    digitalWrite(LED, HIGH);   // turn the LED on (HIGH is the voltage level)
  }
}