PULSE RELAY

4 years 4 months ago #3106 by IoTelf
Hi!

I am doing similar project-my goal is to turn my PC on/off.

Here is my code:
#include <ESP8266WiFi.h>

const char* ssid = "NAME";
const char* password = "PASS";

// Update these with values suitable for your network.
IPAddress ip(192,168,1,100);  //Node static IP
IPAddress gateway(192,168,1,1);
IPAddress subnet(255,255,255,0);

// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);

#define RELAY_PIN 16

void setup() {
  Serial.begin(115200);
  delay(10);

  // prepare GPIO
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, 0);
  
  // Connect to WiFi network
 WiFi.begin(ssid, password);
  WiFi.config(ip, gateway, subnet);

  //Wifi connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");


 // Start the server
  server.begin();
  Serial.println("Server started");

  // Print the IP address
  Serial.println(WiFi.localIP());
}

void loop() {
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  
  // Wait until the client sends some data
  Serial.println("new client");
  while(!client.available()){
    delay(1);
  }
 
  // Read the first line of the request
  String req = client.readStringUntil('\r');
  Serial.println(req);
  client.flush();
  
  // Match the request
  int val;
  if (req.indexOf("/gpio/0") != -1)
    val = 0;
  else if (req.indexOf("/gpio/1") != -1)
    val = 1;
  else {
    Serial.println("invalid request");
    client.stop();
    return;
  }

  // Set GPIO according to the request
  
  if(val == 0)
  {
    digitalWrite(RELAY_PIN,0);
    delay(500);
    digitalWrite(RELAY_PIN,1);
  }else
   if(val == 1)
   {
    digitalWrite(RELAY_PIN,1);
    delay(500);
    digitalWrite(RELAY_PIN,0);
  }
  client.flush();

  // Prepare the response
  String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";
  s += (val)?"high":"low";
  s += "</html>\n";

  // Send the response to the client
  client.print(s);
  delay(1);
  Serial.println("Client disonnected");

  // The client will actually be disconnected 
  // when the function returns and 'client' object is detroyed
}

I did some modifications since I wanted to have fixed IP and also be able to select my own pin. That part is working fine.
The section that is not working fine is "set GPIO" - my server can't do anything with it-ESP doesn't respond to ON/OFF but if I go to ESPIP/gpio/0 or ESPIP/gpio/1 it Works, but in the way as original code worked-not like it should in my code.

Is there anything I need to to do on server side-modify automation program? Also, how to force this instant relay pulse?

Please Log in or Create an account to join the conversation.

4 years 4 months ago #3107 by IoTelf
Ok, problem solved. I used markus's code.

And I also discovered that server on my RPi is corrupted -need to reinstall it.

Please Log in or Create an account to join the conversation.

Time to create page: 0.148 seconds

Forum latest

  • No posts to display.