I’m using the WiFly shield with Arduino, and everything works fine: I upload my skecth to Arduino via USB, i connect a 9V battery, i disconnect the USB, and the wifi module transmits everything fine (it transmit data to my web server).
when the battery runs out, i replace with another battery, but then the wifi/arduino doesnt communicate anymore with my server…
so i’m a newbie on Arduino and i dont understand if every time the power is off Arduino loses all the program, or simply is the wifi that is not able to auto-connect…
is a software problem or hardware?
and if software what i’m doing wrong?
this is my sketch example - i’m just sending a string to my server just as an example:
#include “WiFly.h”
#include “Credentials.h”
Client client(“[myserverip]”, 80);
void setup() {
Serial.begin(9600);
WiFly.begin();
if (!WiFly.join(ssid, passphrase)) {
Serial.println(“Association failed.”);
while (1) {
// Hang on failure.
}
}
connectServer();
}
void loop() {
if (client.available()) {
char c = client.read();
Serial.print(c);
}
if (!client.connected()) {
Serial.println();
Serial.println(“disconnecting.”);
client.stop();
delay(60000); // check every minute
connectServer();
}
}
void connectServer() {
Serial.println(“connecting…”);
if (client.connect()) {
Serial.println(“connected”);
String query = “GET /arduino/test?q=testString HTTP/1.0”;
client.println(query);
client.println();
} else {
Serial.println(“connection failed”);
}
}
so everythign works fine but when i unplug the power and plug it back the arduino doesnt restart the process
thanks