arduino web client random freeze

system · February 27, 2014, 12:06am

I have implemented a web client for arduino to sent data from my sensors to a database throw a GET Http request. The loop randomly freezes on DEBUG 4

This is the part of the code and here https://dl.dropboxusercontent.com/u/15854314/ver4.ino is the full sketch link.

You can also ask at stackoverflow if you like

sprintf(pageAdd,"/write3.php?value0=%d&value1=%d&value2=%f&value3=%lu&value4=%f&value5=%f&value6=%f&value7=%f&value8=%f", value0, dht_humidity, temperature, pressure, altitude, gust, dir, rain, knots);

if(!getPage(server,serverPort,pageAdd)) Serial.print(F("Fail "));
else Serial.print(F("Pass "));



byte getPage(IPAddress ipBuf,int thisPort, char *page)
{
  int inChar;
  char outBuf[128];

  Serial.print(F("connecting..."));

  if(client.connect(ipBuf,thisPort))
  {

     Serial.println(F("connected"));
    sprintf(outBuf,"GET %s HTTP/1.1",page);
    Serial.println(F("DEBUG 1"));
    client.println(outBuf);
    Serial.println(F("DEBUG 2"));
    sprintf(outBuf,"Host: %s",serverName);
    Serial.println(F("DEBUG 3"));
    client.println(outBuf);
    Serial.println(F("DEBUG 4"));
    client.println(F("Connection: close\r\n"));

  } 
  else
  {
    Serial.println(F("failed"));
    return 0;
  }

Thanks for your time!

Chagrin · February 27, 2014, 3:50am

When it gets hung does it stay hung for a long time? Have you tried waiting an hour or more?

I'd suggest trying this change:

    Serial.println(F("connected"));
    sprintf(outBuf,"GET %s HTTP/1.0",page);
    Serial.println(F("DEBUG 1"));
    client.println(outBuf);
    Serial.println(F("DEBUG 2"));
    sprintf(outBuf,"Host: %s\r\n",serverName);
    Serial.println(F("DEBUG 3"));
    client.println(outBuf);

When you drop to HTTP/1.0 you can skip the "Connection: close" part; persistent connections are not part of the HTTP/1.0 spec so you don't have to tell it to close. You can also skip the "Host: 192.168.1.3" part too since you're using what is assuredly the default hostname configured on your web server. The "Host:" header is still usually required with public web sites or with web servers using name-based virtualhosting so keep that in mind.

system · February 27, 2014, 11:21am

Chagrin:
When it gets hung does it stay hung for a long time? Have you tried waiting an hour or more?

I'd suggest trying this change:
    Serial.println(F("connected"));

sprintf(outBuf,"GET %s HTTP/1.0",page);
Serial.println(F("DEBUG 1"));
client.println(outBuf);
Serial.println(F("DEBUG 2"));
sprintf(outBuf,"Host: %s\r\n",serverName);
Serial.println(F("DEBUG 3"));
client.println(outBuf);




When you drop to HTTP/1.0 you can skip the "Connection: close" part; persistent connections are not part of the HTTP/1.0 spec so you don't have to tell it to close. You can also skip the "Host: 192.168.1.3" part too since you're using what is assuredly the default hostname configured on your web server. The "Host:" header is still usually required with public web sites or with web servers using name-based virtualhosting so keep that in mind.

Two days ago same code it recovered after two minuites, when i posted the code it remained hung for hours.
I try now with ur changes

SurferTim · February 27, 2014, 11:58am

That is partly my client code. If it doesn't receive a packet for 10 seconds, it should timeout and continue. Where in the code is it freezing? What is the last message on the serial monitor when it freezes?

You should have posted this in the networking section. I would have seen this thread sooner.

system · February 27, 2014, 12:13pm

SurferTim:
That is partly my client code. If it doesn't receive a packet for 10 seconds, it should timeout and continue. Where in the code is it freezing? What is the last message on the serial monitor when it freezes?

You should have posted this in the networking section. I would have seen this thread sooner.

Just froze and the last printed message was DEBUG 1.... I am in despair guys.... I try to fix this one week now !

system · February 27, 2014, 12:15pm

Full project link: https://dl.dropboxusercontent.com/u/15854314/ver4.ino

Hang image:

SurferTim · February 27, 2014, 12:29pm

This will cause you problems:

sprintf(pageAdd,"/write3.php?value0=%d&value1=%d&value2=%f&value3=%lu&value4=%f&value5=%f&value6=%f&value7=%f&value8=%f", value0, dht_humidity, temperature, pressure, altitude, gust, dir, rain, knots);

sprintf does not support the float data type. It will print a question mark instead of the float value. That would be an invalid character for a url.

system · February 27, 2014, 12:32pm

SurferTim:
This will cause you problems:
sprintf(pageAdd,"/write3.php?value0=%d&value1=%d&value2=%f&value3=%lu&value4=%f&value5=%f&value6=%f&value7=%f&value8=%f", value0, dht_humidity, temperature, pressure, altitude, gust, dir, rain, knots);
sprintf does not support the float data type. It will print a question mark instead of the float value. That would be an invalid character for a url.

It prints 0 so it is not the problem. I also tried like that, still hangs....

  if(client.connect(ipBuf,thisPort))
  {
    Serial.println(F("connected"));
    client.print("GET /write3.php?value0=");  //GET to php file which handle data (value0 and value1) into a database
    //Temperature
    client.print(value0); 
    //Humidity
    client.print("&value1=");
    client.print(dht_humidity); 
    //bmp085 values
    client.print("&value2=");
    client.print(temperature);
    
    client.print("&value3=");
    client.print(pressure);
    
    client.print("&value4=");
    client.print(altitude);
    
    //Weather Meters (Wind speed, direction, rain)
    client.print("&value5=");
    client.print(gust); //Wind speed every 20 seconds
    
    client.print("&value6=");
    client.print(dir);
    
    client.print("&value7=");
    client.print(rain); 
    
    client.print("&value8=");
    client.print(knots); //Wind speed every 60 seconds

    client.println(" HTTP/1.0");
    //client.println("Host: 192.168.1.8");
    client.println();
  }

SurferTim · February 27, 2014, 12:33pm

Which Arduino are you using? I'm testing on a Mega 2560.

:.

system · February 27, 2014, 12:35pm

mega 2560 r3, w5100 are you running my code ?

SurferTim · February 27, 2014, 12:37pm

No, but I just tested the sprintf function, and it prints a question mark if you try to display a float data type.

Which IDE version are you using?

system · February 27, 2014, 12:39pm

1.0.5 At phpmyadmin it logs 0 to database

system · February 27, 2014, 12:45pm

With client.print() method, it just hanged and unhanged two minuites later. With sprintf method it always remained hanged.

Check the screenshot substraction (not substraction_2) value in milliseconds.

SurferTim · February 27, 2014, 12:46pm

I ran this code...

void setup() {
  Serial.begin(115200);
  
  float testf = 123.4;
  char tBuf[32];
  sprintf(tBuf,"Float %f",testf);
  Serial.println(tBuf);
}

void loop() {
}

..and it prints this:

Float ?

A question mark is not allowed unless immediately following the filename.

system · February 27, 2014, 1:53pm

SurferTim:
I ran this code...
void setup() {

Serial.begin(115200);

float testf = 123.4;
char tBuf[32];
sprintf(tBuf,"Float %f",testf);
Serial.println(tBuf);
}

void loop() {
}



..and it prints this:


> Float ?


A question mark is not allowed unless immediately following the filename.

This is not the problem anyway still hangs with the other way..!

SurferTim · February 27, 2014, 1:56pm

Are you certain you are not overflowing the pageAdd array?

system · February 27, 2014, 2:06pm

This method does not use pageAdd

if(client.connect(ipBuf,thisPort))
  {
    Serial.println(F("connected"));
    client.print("GET /write3.php?value0=");  //GET to php file which handle data (value0 and value1) into a database
    //Temperature
    client.print(value0); 
    //Humidity
    client.print("&value1=");
    client.print(dht_humidity); 
    //bmp085 values
    client.print("&value2=");
    client.print(temperature);

system · February 28, 2014, 9:49am

It is running for 30 hours now without problem but sometimes it spikes on "Connected" and continues after two minuites.
Any ideas?

the code is this:

if(client.connect(ipBuf,thisPort))
  {
    Serial.println(F("connected"));
    client.print("GET /write3.php?value0=");  //GET to php file which handle data (value0 and value1) into a database
    //Temperature
    client.print(value0); 
    //Humidity
    client.print("&value1=");
    client.print(dht_humidity); 
    //bmp085 values
    client.print("&value2=");
    client.print(temperature);
    
    client.print("&value3=");
    client.print(pressure);
    
    client.print("&value4=");
    client.print(altitude);
    
    //Weather Meters (Wind speed, direction, rain)
    client.print("&value5=");
    client.print(gust); //Wind speed every 20 seconds
    
    client.print("&value6=");
    client.print(dir);
    
    client.print("&value7=");
    client.print(rain); 
    
    client.print("&value8=");
    client.print(knots); //Wind speed every 60 seconds

    client.println(" HTTP/1.0");
    //client.println("Host: 192.168.1.8");
    client.println();
  }

system · March 4, 2014, 5:26pm

up!

system · March 12, 2014, 7:50pm

up up !!

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arduino web client random freeze

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