Ethernet controlled LED HELP?

Projects Networking, Protocols, and Devices
1

I am trying to control an led on my arduino from a PHP script on another website, but I cannot find anything to do this on Google. I've looked everywhere and there just doesn't seem to be a basic tutorial on how to do this. I would greatly appreciate if someone who knew how to do this could tell me. PLEASE HELP SOON. XD XD XD XD

2

You need to explain in more detail your desired setup. Are you going to use an ethernet shield on your arduino?

3

Hi,

Please try this:

<?php
    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "Hello";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, '192.168.1.25', 12345);
    socket_close($sock);
?>

in this example "192.168.1.25" is destination IP address, "12345" is UDP port

4

Because this is very interesting for me too I try to expand…
Just provide some test and all work :slight_smile:

  1. I upload on my server two PHP files. LED1_ON.php and LED1_OFF.php

LED1_ON.php

<?php
    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "FF0101";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, 'xxx.xxx.xxx.xxx', 12345);
    socket_close($sock);
?>

<?php
    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "FF0100";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, 'xxx.xxx.xxx.xxx', 12345);
    socket_close($sock);
?>
  1. Arduino Ethernet (with ENC28J60) have connected to IP 'xxx.xxx.xxx.xxx'
    It has 4 relays (leds) connected to board.
    Here is code:
#include "EtherShield.h"

uint8_t mymac[6] = {0x00,0x70,0x7C,0xE4,0x8A,0xB8};
uint8_t myip[4] = {xx,xx,xx,xx};

#define BUFFER_SIZE 750
static uint8_t buf[BUFFER_SIZE+1]; 

EtherShield es=EtherShield();

uint16_t plen, dat_p;

///----------------------------------------------------------
void setup(){
  
  Serial.begin(9600); 
  pinMode(5, OUTPUT); 
  pinMode(6, OUTPUT); 
  pinMode(7, OUTPUT); 
  pinMode(8, OUTPUT); 
  es.ES_enc28j60Init(mymac);
  es.ES_init_ip_arp_udp_tcp(mymac,myip, 80);

} // end setup
///----------------------------------------------------------
void loop(){
  
    // read packet, handle ping and wait for a tcp packet:
    dat_p=es.ES_packetloop_icmp_tcp(buf,es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf));
    
    if (buf[IP_PROTO_P]==IP_PROTO_UDP_V){          // We have UDP packet !
       Relay_Control();
       buf[IP_PROTO_P]=0;
    }    
    
} // end loop

void Relay_Control(){
                    
  if ((buf[42]=='F')&(buf[43]=='F')){

      if ((buf[44]=='0')&(buf[45]=='1'))  // Relay 01
         {
         if ((buf[46]=='0')&(buf[47]=='1')) digitalWrite(8, 1);
         if ((buf[46]=='0')&(buf[47]=='0')) digitalWrite(8, 0);
         return;
         }
                      
      if ((buf[44]=='0')&(buf[45]=='2'))  // Relay 02
         {
         if ((buf[46]=='0')&(buf[47]=='1')) digitalWrite(7, 1);
         if ((buf[46]=='0')&(buf[47]=='0')) digitalWrite(7, 0);
         return;
         }
                      
      if ((buf[44]=='0')&(buf[45]=='3'))  // Relay 03
         {
         if ((buf[46]=='0')&(buf[47]=='1')) digitalWrite(6, 1);
         if ((buf[46]=='0')&(buf[47]=='0')) digitalWrite(6, 0);
         return;
         }
                         
      if ((buf[44]=='0')&(buf[45]=='4'))  // Relay 04
         {
         if ((buf[46]=='0')&(buf[47]=='1')) digitalWrite(5, 1); 
         if ((buf[46]=='0')&(buf[47]=='0')) digitalWrite(5, 0); 
         return;
         }
                                         
    }                  
} // end Relay_Control

I successfully control first relay (led) using this two files.

Can somebody who knows PHP help me to make one PHP file with buttons for control all 4 relays (leds) ….