The problem is that after a few sends the actions simply stalls. Resetting helps but again after a few send actions (4-8) it stalls again. The LED at P104 blinks green.
The code are as follows:
#include "WiFly.h"
#include "Credentials.h"
char formkey[]="dHF2eFlCQjhYbnFmRjNLQWlnN29fUlE6MQ"; //Key for google spreadsheet
byte server[]={ 209,85,229,101}; //Google IP
Client client(server, 80);
//Server server(80);
//Store values for temp
int temp_in_kelvin;
int celsius;
void setup() {
WiFly.begin();
if (!WiFly.join(ssid, passphrase)) {
while (1) {
// Hang on failure.
}
}
Serial.begin(9600);
Serial.print("IP: ");
Serial.println(WiFly.ip());
}
void loop() {
//reads the input and converts it to Kelvin degrees
temp_in_kelvin = analogRead(1) * 0.004882812 * 100;
//Converts Kelvin to Celsius minus 2.5 degrees error
celsius = temp_in_kelvin - 2.5 - 273.15;
String data;
data+="";
data+="entry.0.single=";
data+= celsius;
data+="&submit=Submit";
if (client.connect()) {
Serial.println("connected");
client.print("POST /formResponse?formkey=");
client.print(formkey);
client.println("&ifq HTTP/1.1");
client.println("Host: spreadsheets.google.com");
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();
Serial.print("POST /formResponse?formkey=");
Serial.print(formkey);
Serial.println("&ifq HTTP/1.1");
Serial.println("Host: spreadsheets.google.com");
Serial.println("Content-Type: application/x-www-form-urlencoded");
Serial.println("Connection: close");
Serial.print("Content-Length: ");
Serial.println(data.length());
Serial.println();
Serial.print(data);
Serial.println();
}
delay(1000);
if (!client.connected()) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
//Serial.print("Temp: ");
//Serial.println(celsius);
Serial.flush();
delay(10000);
}
at the end of your if(client.connect()){..}, this severs the connection after you are done and allows a new one to start the next time through your loop.
Don't use the String class, your memory gets clobbered by using this class. Also you have a lot of strings in your code. Try to use the F() macro everywhere you supply a string constant to a Stream class object (client and Serial). This conserves some memory too by getting the strings directly from the flash.
What do you mean by "stalling"? Does it restart or just freezing? An out of memory situation usually results in a reset and not a freezing. If it's freezing I would search in the WiFly library. There are lots of situations it waits forever if the return value is not what it expects. I patched my version to include timeouts for every routine. With the patched version I have an uptime of weeks and no freeze (till now ).
I started by inserting lots of Serial.print()s in my code to locate the problematic parts. Then I went into the library and replaced all dead loops with versions with timeouts. If you're interested, I can post my version of the library but be prepared to change your code as I changed the API.
I haven't had the time to make example code, so you have to study the code to get the idea how to use it, although it's not that much of a difference to the original WiFly code, just more possibilities to set timeouts.
).