Mostrar Temas
La idea es que el sketch mande un post con el estado de un led al servidor y que un script php lo reciba, actualice la base de datos segun el valor recibido y mande el valor de otro campo de la misma tabla.
La tabla con la que se interactua (nombrada control) tiene estos campos y entrada:
| device | status | action |
| led1 | 0 | 0 |
El campo que se va a sobreescribir el status, mientras que el que se va a leer y devolver al arduino es action.
El script php (hardware.php) es:
Código:
require_once("connect.php");
$dev = $_POST['device'];
$value = $_POST['value'];
if ($value == "255") {
$value = 255;
}
if ($value == "0") {
$value = 0;
}
$db = "dbname";
mysqli_select_db($connection, $db);
$write = "UPDATE control SET status = $value WHERE device='$dev'";
$reswrite = mysqli_query($connection, $write);
$query = "SELECT * FROM control";
$result = mysqli_query($connection, $query);
while ($row = mysqli_fetch_assoc($result)) {
if($row['action'] == 0){
echo 'a';
}
if($row['action'] == 255){
echo 'b';
}
}
?>
El sketch de arduino es un ejemplo modificado:
Código:
#include <Ethernet.h>
int led1 = 8;
// assign a MAC address for the ethernet controller.
// fill in your address here:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
// fill in an available IP address on your network here,
// for manual configuration:
//IPAddress ip(192, 168, 1, 177);
// fill in your Domain Name Server address here:
//IPAddress myDns(1, 1, 1, 1);
// initialize the library instance:
EthernetClient client;
char server[] = "SERVERNAME";
//IPAddress server(64,131,82,241);
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
const unsigned long postingInterval = 1000L; // delay between updates, in milliseconds
// the "L" is needed to use long type numbers
void setup() {
// give the ethernet module time to boot up:
delay(1000);
// start the Ethernet connection using a fixed IP address and DNS server:
Ethernet.begin(mac);
pinMode(led1, OUTPUT);
digitalWrite(led1, HIGH);
delay(1000);
digitalWrite(led1, LOW);
delay(1000);
}
void loop() {
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available()) {
char c = client.read();
if(c == 'a'){
digitalWrite(led1, LOW);
}
if(c == 'b'){
digitalWrite(led1, HIGH);
}
}
// if ten seconds have passed since your last connection,
// then connect again and send data:
if (millis() - lastConnectionTime > postingInterval) {
httpRequest();
}
}
// this method makes a HTTP connection to the server:
void httpRequest() {
// close any connection before send a new request.
// This will free the socket on the WiFi shield
client.stop();
String stat;
if(digitalRead(led1) == HIGH){
stat+="";
stat+="255";
}
if(digitalRead(led1) == LOW){
stat+="";
stat+="0";
}
String data;
data+="";
data+="device=led1&value=" + stat;
// if there's a successful connection:
if (client.connect(server, 80)) {
// send the HTTP PUT request:
client.println("POST /php/hardware.php HTTP/1.1");
client.println("Host: HERE-WAS-THE-SERVERNAME");
client.println("Content-Type: application/x-www-form-urlencoded");
client.println("Connection: close");
client.print("Content-Length: ");
client.println(data.length());
client.println();
client.print(data);
client.println();
// note the time that the connection was made:
lastConnectionTime = millis();
} else {
// if you couldn't make a connection:
}
}
No logre que esto funcione y no pude identificar el error. Si pudiesen ayudarme o darme alguna sugerencia, consejo o pista sobre lo que va mal, estaria agradecido.
Gracias!