Arduino & PHP query

Using Arduino Programming Questions
#1

I am new to arduino and PHP, I am trying to send rfid readings from the arduino uno with the ethernet shield(ENCJ28J60) to a PHP webpage. My first problem is I can’t get the rfid reading to actually display on the PHP webpage. Please see the attached arduino code and PHP code. I would really apprecaite any help or suggestions on this.

Thanks

Arduino Code

#include <Ethernet.h> //library for ethernet functions
#include <SPI.h>
#include <Dns.h>
#include <Client.h>
#include <SoftwareSerial.h> //library for client functions
SoftwareSerial RFID(2, 3); // RX and TX

// Ethernet settings
byte mac = {0x09,0xA2,0xDA,0x00,0x01,0x26}; //Replace with your Ethernet shield MAC
byte ip = { 192,168,0,54}; //The Arduino device IP address
byte subnet = { 255,255,255,0};
byte gateway = { 192,168,0,1};
IPAddress server(192,168,0,53); // IP-adress of server arduino sends data to

EthernetClient client;

bool connected = false;
int msg;

char newtag[14] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0}; // rfid tag value

//functions
void readTags()
{
if (RFID.available() > 0)
{
// read tag numbers
delay(100); // needed to allow time for the data to come in from the serial buffer.

for (int z = 0 ; z < 14 ; z++) // read the rest of the tag
{
int data1 = RFID.read();
newtag[z] = data1;
}
RFID.flush(); // stops multiple reads

}
}

void setup(void) {

Serial.begin(9600);
RFID.begin(9600);
Serial.println(“Initializing Ethernet.”);
delay(1000);
Ethernet.begin(mac);

}

void loop(void) {

if(!connected) {
Serial.println(“Not connected”);
if (client.connect(server, 80)) {
connected = true;
int RFID =analogRead(A1);
Serial.print(“RFID is “);
Serial.println(RFID);
Serial.println();
Serial.println(“Sending to Server: “);
client.print(“GET /formSubmit.php?t0=”);
Serial.print(“GET /formSubmit.php?t0=”);
client.print(RFID);
Serial.print(RFID);
client.println(” HTTP/1.1”);
Serial.println(” HTTP/1.1”);
client.println(“Host: http://localhost/PhpProject1/”);
Serial.println(“Host: http://localhost/PhpProject1/”);
client.println(“User-Agent: Arduino”);
Serial.println(“User-Agent: Arduino”);
client.println(“Accept: text/html”);
Serial.println(“Accept: text/html”);
//client.println(“Connection: close”);
//Serial.println(“Connection: close”);
client.println();
Serial.println();
delay(10000);
}
else{
Serial.println(“Cannot connect to Server”);
}
}
else {
delay(1000);
while (client.connected() && client.available()) {
char c = client.read();
Serial.print(c);
}
Serial.println();
client.stop();
connected = false;
}
}

sketch_dec03a.ino (3.23 KB)

#2

And your PHP?

btw when including code please enclose it within [code] and [/code] tags

#3

This is the php

<?php
  echo date("d.m.Y-H:i:s") . " RFID= " . $_GET['t0']; 
  ?>
#4 
if (RFID.available() > 0)
  {
    // read tag numbers
    delay(100); // needed to allow time for the data to come in from the serial buffer.
 
    for (int z = 0 ; z < 14 ; z++) // read the rest of the tag
    {
      int data1 = RFID.read();
      newtag[z] = data1;
    }

Serial data arrives slowly. As soon as the first byte arrives, it is NOT okay to read all 14 bytes.

Where are you expecting that php script to echo the data?

client.println("Host: http://localhost/PhpProject1/");

localhost means the server that the client is running on. The PHP script is NOT located on the Arduino.

#5