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Topic: Arduino Webserver with Temperature Monitor / Control (Read 53156 times) previous topic - next topic


Btguillaume

Okay, so I have the code right here :

Code: [Select]
#include "etherShield.h"

// please modify the following two lines. mac and ip have to be unique
// in your local area network. You can not have the same numbers in
// two devices:
static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x24};
static uint8_t myip[4] = {192,168,1,15};
static char baseurl[]="http://192.168.1.15/";
static uint16_t mywwwport =80; // listen port for tcp/www (max range 1-254)
// or on a different port:
//static char baseurl[]="http://10.0.0.24:88/";
//static uint16_t mywwwport =88; // listen port for tcp/www (max range 1-254)
//


#define BUFFER_SIZE 500
static uint8_t buf[BUFFER_SIZE+1];
#define STR_BUFFER_SIZE 22
static char strbuf[STR_BUFFER_SIZE+1];

EtherShield es=EtherShield();

// prepare the webpage by writing the data to the tcp send buffer
uint16_t print_webpage(uint8_t *buf);
int8_t analyse_cmd(char *str);
// get current temperature
#define TEMP_PIN  3
void getCurrentTemp( int *sign, int *whole, int *fract);

void setup(){
 
  /*initialize enc28j60*/
es.ES_enc28j60Init(mymac);
  es.ES_enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
  delay(10);
       
/* Magjack leds configuration, see enc28j60 datasheet, page 11 */
// LEDA=greed LEDB=yellow
//
// 0x880 is PHLCON LEDB=on, LEDA=on
// enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
es.ES_enc28j60PhyWrite(PHLCON,0x880);
delay(500);
//
// 0x990 is PHLCON LEDB=off, LEDA=off
// enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
es.ES_enc28j60PhyWrite(PHLCON,0x990);
delay(500);
//
// 0x880 is PHLCON LEDB=on, LEDA=on
// enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
es.ES_enc28j60PhyWrite(PHLCON,0x880);
delay(500);
//
// 0x990 is PHLCON LEDB=off, LEDA=off
// enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
es.ES_enc28j60PhyWrite(PHLCON,0x990);
delay(500);
//
 // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit
 // enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10);
 es.ES_enc28j60PhyWrite(PHLCON,0x476);
delay(100);
       
 //init the ethernet/ip layer:
 es.ES_init_ip_arp_udp_tcp(mymac,myip,80);
 
 // initialize DS18B20 datapin
   digitalWrite(TEMP_PIN, LOW);
   pinMode(TEMP_PIN, INPUT);      // sets the digital pin as input (logic 1)


}

void loop(){
 uint16_t plen, dat_p;
 int8_t cmd;

 plen = es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf);

/*plen will ne unequal to zero if there is a valid packet (without crc error) */
 if(plen!=0){
         
   // arp is broadcast if unknown but a host may also verify the mac address by sending it to a unicast address.
   if(es.ES_eth_type_is_arp_and_my_ip(buf,plen)){
     es.ES_make_arp_answer_from_request(buf);
     return;
   }

   // check if ip packets are for us:
   if(es.ES_eth_type_is_ip_and_my_ip(buf,plen)==0){
     return;
   }
   
   if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
     es.ES_make_echo_reply_from_request(buf,plen);
     return;
   }
   
   // tcp port www start, compare only the lower byte
   if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==mywwwport){
     if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
        es.ES_make_tcp_synack_from_syn(buf); // make_tcp_synack_from_syn does already send the syn,ack
        return;    
     }
     if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
       es.ES_init_len_info(buf); // init some data structures
       dat_p=es.ES_get_tcp_data_pointer();
       if (dat_p==0){ // we can possibly have no data, just ack:
         if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
           es.ES_make_tcp_ack_from_any(buf);
         }
         return;
       }
       if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){
          // head, post and other methods for possible status codes see:
           // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
           plen=es.ES_fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
           goto SENDTCP;
       }

Btguillaume

Code: [Select]
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
                plen=print_webpage(buf);
            goto SENDTCP;
         }
        cmd=analyse_cmd((char *)&(buf[dat_p+5]));
        if (cmd==1){
             plen=print_webpage(buf);
        }
SENDTCP:  es.ES_make_tcp_ack_from_any(buf); // send ack for http get
           es.ES_make_tcp_ack_with_data(buf,plen); // send data       
      }
    }
  }
       
}
// The returned value is stored in the global var strbuf
uint8_t find_key_val(char *str,char *key)
{
        uint8_t found=0;
        uint8_t i=0;
        char *kp;
        kp=key;
        while(*str &&  *str!=' ' && found==0){
                if (*str == *kp){
                        kp++;
                        if (*kp == '\0'){
                                str++;
                                kp=key;
                                if (*str == '='){
                                        found=1;
                                }
                        }
                }else{
                        kp=key;
                }
                str++;
        }
        if (found==1){
                // copy the value to a buffer and terminate it with '\0'
                while(*str &&  *str!=' ' && *str!='&' && i<STR_BUFFER_SIZE){
                        strbuf[i]=*str;
                        i++;
                        str++;
                }
                strbuf[i]='\0';
        }
        return(found);
}

int8_t analyse_cmd(char *str)
{
        int8_t r=-1;
     
        if (find_key_val(str,"cmd")){
                if (*strbuf < 0x3a && *strbuf > 0x2f){
                        // is a ASCII number, return it
                        r=(*strbuf-0x30);
                }
        }
        return r;
}


uint16_t print_webpage(uint8_t *buf)
{
        char temp_string[10];
        int i=0;
        //char *temp_string="100";
       
        uint16_t plen;
       
        getCurrentTemp(temp_string);
       
        plen=es.ES_fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<center><p><h1>Welcome to Arduino Ethernet Shield V1.0  </h1></p> "));
         
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<hr><br><form METHOD=get action=\""));
        plen=es.ES_fill_tcp_data(buf,plen,baseurl);
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("\">"));
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<h2> Current Temperature is </h2> "));
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<h1><font color=\"#00FF00\"> "));
         
       
        while (temp_string[i]) {
                buf[TCP_CHECKSUM_L_P+3+plen]=temp_string[i++];
                plen++;
        }

plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("  &#176C</font></h1><br> ") );
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<input type=hidden name=cmd value=1>"));
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<input type=submit value=\"Get Temperature\"></form>"));
        plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("</center><hr> <p> V1.0 <a href=\"http://www.nuelectronics.com\">www.nuelectronics.com<a>"));
 
        return(plen);
}


void OneWireReset(int Pin) // reset.  Should improve to act as a presence pulse
{
     digitalWrite(Pin, LOW);
     pinMode(Pin, OUTPUT); // bring low for 500 us
     delayMicroseconds(500);
     pinMode(Pin, INPUT);
     delayMicroseconds(500);
}

void OneWireOutByte(int Pin, byte d) // output byte d (least sig bit first).
{
   byte n;

   for(n=8; n!=0; n--)
   {
      if ((d & 0x01) == 1)  // test least sig bit
      {
         digitalWrite(Pin, LOW);
         pinMode(Pin, OUTPUT);
         delayMicroseconds(5);
         pinMode(Pin, INPUT);
         delayMicroseconds(60);
      }
      else
      {
         digitalWrite(Pin, LOW);
         pinMode(Pin, OUTPUT);
         delayMicroseconds(60);
         pinMode(Pin, INPUT);
      }

      d=d>>1; // now the next bit is in the least sig bit position.
   }
   
}

byte OneWireInByte(int Pin) // read byte, least sig byte first
{
    byte d, n, b;

    for (n=0; n<8; n++)
    {
        digitalWrite(Pin, LOW);
        pinMode(Pin, OUTPUT);
        delayMicroseconds(5);
        pinMode(Pin, INPUT);
        delayMicroseconds(5);
        b = digitalRead(Pin);
        delayMicroseconds(50);
        d = (d >> 1) | (b<<7); // shift d to right and insert b in most sig bit position
    }
    return(d);
}


void getCurrentTemp(char *temp)

  int HighByte, LowByte, TReading, Tc_100, sign, whole, fract;

  OneWireReset(TEMP_PIN);
  OneWireOutByte(TEMP_PIN, 0xcc);
  OneWireOutByte(TEMP_PIN, 0x44); // perform temperature conversion, strong pullup for one sec

  OneWireReset(TEMP_PIN);
  OneWireOutByte(TEMP_PIN, 0xcc);
  OneWireOutByte(TEMP_PIN, 0xbe);

  LowByte = OneWireInByte(TEMP_PIN);
  HighByte = OneWireInByte(TEMP_PIN);
  TReading = (HighByte << 8) + LowByte;
  sign = TReading & 0x8000;  // test most sig bit
  if (sign) // negative
  {
    TReading = (TReading ^ 0xffff) + 1; // 2's comp
  }
  Tc_100 = (6 * TReading) + TReading / 4;    // multiply by (100 * 0.0625) or 6.25

  whole = Tc_100 / 100;  // separate off the whole and fractional portions
  fract = Tc_100 % 100;


if(sign) temp[0]='-';
else temp[0]='+';

        if(whole/100==0)
           temp[1] =' ';
        else
  temp[1]= whole/100+'0';
temp[2]= (whole-(whole/100)*100)/10 +'0' ;
temp[3]= whole-(whole/10)*10 +'0';

temp[4]='.';
temp[5]=fract/10 +'0';
temp[6]=fract-(fract/10)*10 +'0';

temp[7] = '\0';



}

alvydas001

why dont use DallasTemperatureControl library?


alvydas001


Btguillaume

what's that I juste done a quick google's search, but nothing interrested....

can you explain what's that?

Chagrin

There's an Arduino library for "one wire" devices like the DS18B20.

http://playground.arduino.cc/Learning/OneWire

alvydas001


what's that I juste done a quick google's search, but nothing interrested....

can you explain what's that?

I mean this library:
http://milesburton.com/Dallas_Temperature_Control_Library
https://github.com/milesburton/Arduino-Temperature-Control-Library

teria

Hi everybody! I'm newbie and I want to make similar project. But I use Wiznet W5100 Ethernet Shield... So my question is how to change the code for the Arduino Ethernet Shield? ?an anybody help me?

dmerlani

Hi, this code is really nice! I modified it a little bit to be used with LM35DZ.
Now I need to implement the basic authentication (otherwise everybody can enter my home system and switch on my heater!!!) but I am completely lost!!! Could someone help me please?
thanks!

Chagrin

The client will make a request to your Arduino, typically with no authorization.

Code: [Select]
GET /foo HTTP/1.0
Host: foo.bar.com


Your arduino should respond with a request for authorization
Code: [Select]

403 Forbidden


The client will redo its request with credentials
Code: [Select]

GET /foo HTTP/1.0
Host: foo.bar.com
Authorization: Basic base_64_encoded_username_password


Your arduino can either decode the base64 encoded string or simply perform a match against a known base64 encoded string. An example of a an encoded Header, using the username "username" and password "password" separated by a colon in the standard format of "username:password" would look like:

Code: [Select]
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

In each instance there will be additional HTTP headers present, such as "User-Agent:" or "Accept:", but what I have above are the only important ones.

Putting that more simply, for any request that you receive you should verify that there is an Authorization: header and that the encoded string contains a proper username/password. Continue processing the request as usual if so. If not, reply with a 403 Forbidden response.

dmerlani

Hi, could you help me to integrate it in my code?
I am really a newbie...
Thanks!

sergiotux

Hello all, congratulations for the project, share code and give attention to all the questions.

I'm from Brazil and I have a system that informs the lack of electricity SMS.

I connected one shild GPRS on a ATMEGA328 (standalone, I made a simple board), it connected two power sensors and temperature.

When power a generator should be fired and then he sends an SMS with this information.

I added a network card that I also have this information via the web.

Did you or anyone have time to help me with this?
Pessimo'm programming ...

Hugs to all.

Sergio

elektrokan

  Nice project,  but I cant read temp value over the page  :~ I can read only 0.6 C and not changing. Please help.

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