NodeMCU V3 ESP8266

WiFi Modes of Operation of ESP8266: There are three modes of WiFi Operation in the ESP8266 WiFi Module. Those are:

1. Station Mode (STA)
2. Soft Access Point (AP)
3. Soft AP + Station

Station Mode

Only Access Point

#include "ESP8266WiFi.h"

const char* ssid = "ChorkeOrg_2.4GHz";
const char* pass = "academia";

void setup(void) {
  pinMode(D4, OUTPUT);
  Serial.begin(115200);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print("*");
  }

  Serial.println("");
  Serial.println("WiFi connection Successful");
  Serial.print("The IP Address of ESP8266 Module is: ");
  Serial.print(WiFi.localIP());
}

void loop() {
  digitalWrite(D4, LOW);
  delay(1000);
  digitalWrite(D4, HIGH);
  delay(1000);
}

Multi Access Point

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

const char* ap0_ssid_24 = "ChorkeOrg";
const char* ap0_pasword = "chorke@bd/0A";
const char* ap0_ssid_50 = "ChorkeOrg_2.4GHz";

ESP8266WiFiMulti multi;

void setup(void) {
  pinMode(D4, OUTPUT);
  Serial.begin(115200);

  delay(10);
  Serial.println('\n');
  multi.addAP(ap0_ssid_24, ap0_pasword);
  multi.addAP(ap0_ssid_50, ap0_pasword);

  Serial.print("Connecting : ");
  while (multi.run() != WL_CONNECTED) {
    delay(500);
    Serial.print('>');
  }
  Serial.println('\n');
  Serial.print("Connected to: ");
  Serial.println(WiFi.SSID());
  Serial.print("IP address  : ");
  Serial.println(WiFi.localIP());
}

void loop() {
  digitalWrite(D4, LOW);
  delay(1000);
  digitalWrite(D4, HIGH);
  delay(1000);
}

Soft Access Point

#include "ESP8266WiFi.h"

const char* ssid = "ChorkeIot_2.4GHz";
const char* pass = "academia";

IPAddress local_IP(10, 19, 83, 10);
IPAddress subnet(255, 255, 255, 0);
IPAddress gateway(10, 19, 83, 1);

void setup(void) {
  pinMode(D4, OUTPUT);
  Serial.begin(115200);
  Serial.println();

  Serial.print("WNC Config: ");
  Serial.print(WiFi.softAPConfig(local_IP, gateway, subnet) ? "Ready" : "Failed!");

  Serial.println("SID Config: ");
  Serial.print(WiFi.softAP(ssid, pass) ? "Ready" : "Failed!");

  Serial.println("WAN Config: ");
  Serial.print(WiFi.softAPIP());
}

void loop() {
  digitalWrite(D4, LOW);
  delay(1000);
  digitalWrite(D4, HIGH);
  delay(1000);
}

References

• Quick Start with NodeMCU V3 ESP8266
• WiFi Modes Station Access Point
• Blynk Simple ESP8266 Header
• Arduino core for ESP8266
• Connect ESP8266 to WiFi
• NodeMCU V3 ESP8266
• Soft Access Point Class
• Blynk C++ Library
• Blynk Example
• Arduino IDE