Name: ejemplo de código de programación del módulo de relé nodemcu esp8266
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Ejemplo: control de relé nodemcu esp8266

/*********
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/esp8266-relay-module-ac-web-server/
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
*********/

// Import required libraries
#include "ESP8266WiFi.h"
#include "ESPAsyncWebServer.h"

// Set to true to define Relay as Normally Open (NO)
#define RELAY_NO    true

// Set number of relays
#define NUM_RELAYS  5

// Assign each GPIO to a relay
int relayGPIOs[NUM_RELAYS] = 5, 4, 14, 12, 13;

// Replace with your network credentials
const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

const char* PARAM_INPUT_1 = "relay";  
const char* PARAM_INPUT_2 = "state";

// Create AsyncWebServer object on port 80
AsyncWebServer server(80);

const char index_html[] PROGMEM = R"rawliteral(
DOCTYPEHTML><html><head><metaname="viewport"content="width=device-width, initial-scale=1"><style>htmlfont-family: Arial;display: inline-block;text-align: center;h2font-size:3.0rem;pfont-size:3.0rem;bodymax-width:600px;margin:0px auto;padding-bottom:25px;.switchposition: relative;display: inline-block;width:120px;height:68px.switch inputdisplay: none.sliderposition: absolute;top:0;left:0;right:0;bottom:0;background-color:#ccc;border-radius:34px.slider:beforeposition: absolute;content:"";height:52px;width:52px;left:8px;bottom:8px;background-color:#fff;-webkit-transition:.4s;transition:.4s;border-radius:68pxinput:checked+.sliderbackground-color:#2196F3input:checked+.slider:before-webkit-transform:translateX(52px);-ms-transform:translateX(52px);transform:translateX(52px)style>head><body><h2>ESP Web Serverh2>
  %BUTTONPLACEHOLDER%
<script>functiontoggleCheckbox(element)var xhr =newXMLHttpRequest();if(element.checked) xhr.open("GET","/update?relay="+element.id+"&state=1",true);else xhr.open("GET","/update?relay="+element.id+"&state=0",true);
  xhr.send();script>body>html>
)rawliteral";

// Replaces placeholder with button section in your web page
String processor(const String& var)
  //Serial.println(var);
  if(var == "BUTTONPLACEHOLDER")
    String buttons ="";
    for(int i=1; i<=NUM_RELAYS; i++)
      String relayStateValue = relayState(i);
      buttons+= "<h4>Relay #" + String(i) + " - GPIO " + relayGPIOs[i-1] + "h4>span>label>";
    
    return buttons;
  
  return String();


String relayState(int numRelay)
  if(RELAY_NO)
    if(digitalRead(relayGPIOs[numRelay-1]))
      return "";
    
    else 
      return "checked";
    
  
  else 
    if(digitalRead(relayGPIOs[numRelay-1]))
      return "checked";
    
    else 
      return "";
    
  
  return "";


void setup()
  // Serial port for debugging purposes
  Serial.begin(115200);

  // Set all relays to off when the program starts - if set to Normally Open (NO), the relay is off when you set the relay to HIGH
  for(int i=1; i<=NUM_RELAYS; i++)
    pinMode(relayGPIOs[i-1], OUTPUT);
    if(RELAY_NO)
      digitalWrite(relayGPIOs[i-1], HIGH);
    
    else
      digitalWrite(relayGPIOs[i-1], LOW);
    
  
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) 
    delay(1000);
    Serial.println("Connecting to WiFi..");
  

  // Print ESP8266 Local IP Address
  Serial.println(WiFi.localIP());

  // Route for root / web page
  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request)
    request->send_P(200, "text/html", index_html, processor);
  );

  // Send a GET request to <ESP_IP>/update?relay=<inputMessage>&state=<inputMessage2>
  server.on("/update", HTTP_GET, [] (AsyncWebServerRequest *request) 
    String inputMessage;
    String inputParam;
    String inputMessage2;
    String inputParam2;
    // GET input1 value on <ESP_IP>/update?relay=<inputMessage>
    if (request->hasParam(PARAM_INPUT_1) & request->hasParam(PARAM_INPUT_2)) 
      inputMessage = request->getParam(PARAM_INPUT_1)->value();
      inputParam = PARAM_INPUT_1;
      inputMessage2 = request->getParam(PARAM_INPUT_2)->value();
      inputParam2 = PARAM_INPUT_2;
      if(RELAY_NO)
        Serial.print("NO ");
        digitalWrite(relayGPIOs[inputMessage.toInt()-1], !inputMessage2.toInt());
      
      else
        Serial.print("NC ");
        digitalWrite(relayGPIOs[inputMessage.toInt()-1], inputMessage2.toInt());
      
    
    else 
      inputMessage = "No message sent";
      inputParam = "none";
    
    Serial.println(inputMessage + inputMessage2);
    request->send(200, "text/plain", "OK");
  );
  // Start server
  server.begin();

  
void loop()

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Tags : Misc Example /

ejemplo de código de programación del módulo de relé nodemcu esp8266

Ejemplo: control de relé nodemcu esp8266

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