ENC28J60 on the Web

1// Using as client mode to send data to your website.
2
3// Simple  demo for feeding some random data to Pachube.
4// 2011-07-08 <jc@wippler.nl> http://opensource.org/licenses/mit-license.php
5
6//  Handle returning code and reset ethernet module if needed
7// 2013-10-22 hneiraf@gmail.com
8
9//  Modifing so that it works on my setup for www.thingspeak.com.
10// Arduino pro-mini  5V/16MHz, ETH modul on SPI with CS on pin 10.
11// Also added a few changes found  on various forums. Do not know what the 
12// res variable is for, tweaked it so  it works faster for my application
13// 2015-11-09 dani.lomajhenic@gmail.com
14
15#include  <EtherCard.h>
16
17// change these settings to match your own setup
18//#define  FEED "000"
19#define APIKEY "beef1337beef1337" // put your key here
20#define  ethCSpin 10 // put your CS/SS pin here.
21
22// ethernet interface mac address,  must be unique on the LAN
23static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31  };
24const char website[] PROGMEM = "moty22.co.uk";  //Change to your domain  name 
25byte Ethernet::buffer[700];
26uint32_t timer;
27Stash stash;
28byte  session;
29String d1;
30//timing variable
31int res = 100; // was 0
32int analog=0;
33
34
35void  setup () {
36  pinMode(3,INPUT_PULLUP);
37  Serial.begin(9600);
38  Serial.println("\
39[ThingSpeak  example]");
40
41  //Initialize Ethernet
42  initialize_ethernet();
43}
44
45
46void  loop () { 
47  //if correct answer is not received then re-initialize ethernet  module
48  if (res > 220){
49    initialize_ethernet(); 
50  }
51  
52  res  = res + 1;
53  
54  ether.packetLoop(ether.packetReceive());
55  
56  //200  res = 30 seconds (150ms each res)
57  if (res == 200) {
58
59    analog = analogRead(A0);
60    if(digitalRead(3)) {d1 = "OFF";} else {d1 = "ON";}  
61
62    // generate  3 values as payload - by using a separate stash,
63    // we can determine the  size of the generated message ahead of time
64    
65    byte sd = stash.create();
66
67    stash.print("field1=");
68    stash.print(highByte(analog));
69    stash.print("&field2=");
70    stash.print(lowByte(analog));
71    stash.print("&field3=");
72    stash.print(d1);
73    
74    stash.save();
75
76    // generate the header with payload - note  that the stash size is used,
77    // and that a "stash descriptor" is passed  in as argument using "$H"
78    Stash::prepare(PSTR("POST /a11.php HTTP/1.1"  "\
\
79"
80      "Host: $F" "\
\
81"
82      "Connection: close" "\
\
83"
84      "X-THINGSPEAKAPIKEY: $F" "\
\
85"
86      "Content-Type: application/x-www-form-urlencoded"  "\
\
87"
88      "Content-Length: $D" "\
\
89"
90      "\
\
91"
92      "$H"),
93      website, PSTR(APIKEY), stash.size(), sd);
94
95    // send the packet -  this also releases all stash buffers once done
96    session = ether.tcpSend();  
97
98 // added from: http://jeelabs.net/boards/7/topics/2241
99// int freeCount  = stash.freeCount();
100//    if (freeCount <= 3) {   Stash::initMap(56); } 
101  }
102  
103   const char* reply = ether.tcpReply(session);
104   
105   if (reply  != 0) {
106     res = 0;
107     Serial.println(F(" >>>REPLY recieved...."));
108     Serial.println(reply);
109     delay(300);
110   }
111   delay(150);
112}
113
114void  initialize_ethernet(void){  
115  for(;;){ // keep trying until you succeed 
116
117    if (ether.begin(sizeof Ethernet::buffer, mymac, ethCSpin) == 0){ 
118      Serial.println(  "Failed to access Ethernet controller");
119      continue;
120    }
121    
122    if (!ether.dhcpSetup()){
123      Serial.println("DHCP failed");
124      continue;
125    }
126
127    ether.printIp("IP:  ", ether.myip);
128    ether.printIp("GW:  ", ether.gwip);  
129    ether.printIp("DNS: ", ether.dnsip);  
130
131    if  (!ether.dnsLookup(website))
132      Serial.println("DNS failed");
133
134    ether.printIp("SRV:  ", ether.hisip);
135
136    //reset init value
137    res = 180;
138    break;
139  }
140}
141