Si no has leído el artículo anterior te recomiendo que lo hagas ya que en este vamos a conectar a una red que el NodeMCU haya detectado y para esto debemos escanear redes, esta demostración se encuentra en el artículo anterior.
Artículo anterior: https://ciber-tips.juegazos.net/escaner-redes-wifi/
Para conectar a una red lo vamos a ver de diferentes formas: la primera es escanear y conectarte a la primera red que encuentre existiendo dos posibilidades que tenga contraseña o no, y la segunda poniendo un SSID estático, por lo que siempre se va a conectar a la misma red.
Conectar con escáner:
Ejemplo 1:
Comenzamos con la primera opción y es escanear redes y que se conecte a la primera que encuentre suponiendo que esta no tenga contraseña. Para esto vamos al proyecto que habíamos hecho en el video anterior y escribimos en el void loop antes del delay wi-fi.begin (WiFi.SSID(0)).
#include "ESP8266WiFi.h"
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
}
void loop() {
Serial.println("Escaneando...");
int n = WiFi.scanNetworks();
Serial.println("Escaner terminado");
if (n == 0) {
Serial.println("No se encontraron redes");
}
else {
Serial.print(n);
Serial.println(": Redes encontradas");
for (int i = 0; i < n; ++i) {
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*");
delay(10);
}
}
WiFi.begin(WiFi.SSID(0));
Serial.println("Conectado a red 1");
delay(5000);
}Ejemplo 2:
En el segundo caso la diferencia es que vamos a colocar después del SSID una coma y seguido la contraseña.
#include "ESP8266WiFi.h"
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
}
void loop() {
Serial.println("Escaneando...");
int n = WiFi.scanNetworks();
Serial.println("Escaner terminado");
if (n == 0) {
Serial.println("No se encontraron redes");
}
else {
Serial.print(n);
Serial.println(": Redes encontradas");
for (int i = 0; i < n; ++i) {
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*");
delay(10);
}
}
WiFi.begin(WiFi.SSID(0),"12345678");
Serial.println("Conectado a red 1");
delay(5000);
}Conectar con SSID estático
Ejemplo 1:
En el tercer caso voy a decirle al NodeMCU que se conecte a una red especifica que no tenga contraseña. Para esto voy barrar todo el proceso de escáner de redes y declaro una variable a la cual le voy a poner el SSID de la red que quiero que se conecte. En el setup dejamos la configuración del modo estación y en el loop ponemos WiFi.begin(en la variable que guardamos el SSID).
#include "ESP8266WiFi.h"
const char* ssid = "CiberTips";
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
}
void loop() {
WiFi.begin(ssid);
Serial.println("Se conectó a ");
Serial.println("CiberTips");
Serial.print("");
delay(10000);
}Ejemplo 2:
En el cuarto caso voy a decirle al NodeMCU que se conecte a una red especifica con contraseña. Para esto es el mismo proceso del tercer caso, pero incluyendo una variable donde guardamos la contraseña y en el loop lo que hacemos es incluir la variable de la contraseña después del SSID.
#include "ESP8266WiFi.h"
const char* ssid = "CiberTips";
const char* = "12345678";
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
}
void loop() {
WiFi.begin(ssid,);
Serial.println("Se conectó a ");
Serial.println("CiberTips");
Serial.print("");
delay(10000);
}Descarga el IDE Arduino: https://www.arduino.cc/en/main/software
Estudiante de Ing. Telecomunicaciones y Electrónica
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