PupuJuku - ESP8266

Kuidas distantsilt katkestada LAN võrguühendus. Ega see tuumateadus ole, piisab kui sahtlis on üks ESP01S juhtiv relee, mõned RJ45 emased kontaktid, 5VDC toide (ESP-le) ja mingi karbike.
Ühenduse katkestamiseks on tarviline lasta oranz juhe läbi relee
ESP juhtimine on juba maitseasi, kas otse Blynkist või Blynk->Nodered->MQTT->ESP
Milleks seda vaja oli ?
Krt. seda teab, igavusest vist.
Metsavend vaatas mind veidi imelikult, küllap ei tahtnud halvasti ütelda ...

/***** ESP01a *********/

#include <ESP8266WiFi.h>
#include <PubSubClient.h>

const char* ssid = "sdfgsfdger";
const char* pass = "rtdgfgfdfd";
const char* mqtt_server = "hhh.jjj.öö.pp"; // Raspberry IP

WiFiClient kunde_1;
PubSubClient client(kunde_1);

const int pin = 0; //GPIO0

// Don't change the function below. This functions connects your ESP8266 to your router
void setup_wifi() {
  delay(10);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }  
}

// This functions is executed when some device publishes a message to a topic that your ESP8266 is subscribed to
// your ESP8266 is subscribed you can actually do something
void callback(String topic, byte* message, unsigned int length) {
  String messageTemp;
  for (int i = 0; i < length; i++) {
    messageTemp += (char)message[i];
  }
  if(topic=="yyy"){
      Serial.print("Changing ...: ");
      if(messageTemp == "1"){
        digitalWrite(pin, LOW);
      }
      else if(messageTemp == "0"){
        digitalWrite(pin, HIGH);
      }
  }
}

// This functions reconnects your ESP8266 to your MQTT broker
// Change the function below if you want to subscribe to more topics with your ESP8266 
void reconnect() {
  while (!client.connected()) {   // Loop until we're reconnected
    if (client.connect("kunde_1")) {
      // Subscribe or resubscribe to a topic. You can subscribe to more topics
      client.subscribe("yyy");
    } else {
      delay(5000);
    }
  }
}

// The setup function sets your ESP GPIOs to Outputs, starts the serial communication at a baud rate of 115200
// Sets your mqtt broker and sets the callback function -receives messages and controls pins
void setup() {
  pinMode(pin, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

// For this project, you don't need to change anything in the loop function. Basically it ensures that you ESP is connected to your broker
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  if(!client.loop())
    client.connect("kunde_1");
}

ESP8266 - CAT5