1 | #undef DEBUG
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2 |
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3 | #include "EtherShield.h"
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4 |
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5 | // please modify the following three lines. mac and ip have to be unique
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6 | // in your local area network. You can not have the same numbers in
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7 | // two devices:
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8 | static uint8_t mymac[6] = { 0x54,0x55,0x58,0x10,0x20,0x35};
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9 | static uint8_t myip[4] = { 192,168,1,98};
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10 |
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11 | // listen port for tcp/www (max range 1-254)
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12 | #define MYWWWPORT 80
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13 |
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14 | #define BUFFER_SIZE 800
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15 | static uint8_t buf[BUFFER_SIZE+1];
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16 | #define STR_BUFFER_SIZE 22
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17 | static char strbuf[STR_BUFFER_SIZE+1];
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18 |
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19 | EtherShield es=EtherShield();
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20 |
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21 | uint16_t http200ok(void)
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22 | {
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23 | return(es.ES_fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n")));
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24 | }
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25 |
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26 | uint16_t http404(void)
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27 | {
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28 | return(es.ES_fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 404 OK\r\nContent-Type: text/html\r\n\r\n")));
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29 | }
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30 |
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31 | // prepare the webpage by writing the data to the tcp send buffer
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32 | uint16_t print_webpage(uint8_t *buf)
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33 | {
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34 | uint16_t plen;
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35 | plen=http200ok();
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36 | plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<html><body><h1>Error 404</h1><p>Diese Seite existiert nicht</body></html>"));
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37 |
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38 | return(plen);
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39 | }
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40 |
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41 |
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42 | #define CMDBUF 50
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43 |
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44 | int16_t process_request(char *str)
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45 | {
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46 | int8_t r=-1;
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47 | int8_t i = 0;
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48 | char clientline[CMDBUF];
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49 | int index = 0;
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50 | int plen = 0;
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51 |
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52 | #ifdef DEBUG
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53 | // Serial.println( str );
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54 | #endif
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55 |
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56 | char ch = str[index];
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57 |
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58 | while( ch != ' ' && index < CMDBUF) {
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59 | clientline[index] = ch;
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60 | index++;
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61 | ch = str[index];
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62 | }
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63 | clientline[index] = '\0';
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64 |
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65 | #ifdef DEBUG
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66 | Serial.println( clientline );
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67 | #endif
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68 |
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69 | // convert clientline into a proper
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70 | // string for further processing
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71 | String urlString = String(clientline);
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72 |
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73 | // extract the operation
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74 | String op = urlString.substring(0,urlString.indexOf(' '));
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75 |
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76 | // we're only interested in the first part...
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77 | urlString = urlString.substring(urlString.indexOf('/'), urlString.indexOf(' ', urlString.indexOf('/')));
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78 |
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79 | // put what's left of the URL back in client line
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80 | urlString.toCharArray(clientline, CMDBUF);
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81 |
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82 | // get the first two parameters
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83 | char *pin = strtok(clientline,"/");
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84 | char *value = strtok(NULL,"/");
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85 |
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86 | // this is where we actually *do something*!
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87 | char outValue[10] = "MU";
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88 | //outValue = "MU";
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89 | // String jsonOut = String();
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90 | char jsonOut[50];
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91 |
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92 | if(pin != NULL){
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93 | if(value != NULL){
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94 |
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95 | // set the pin value
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96 | #ifdef DEBUG
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97 | Serial.println("setting pin");
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98 | #endif
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99 |
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100 | // select the pin
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101 | int selectedPin = pin[0] -'0';
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102 | #ifdef DEBUG
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103 | Serial.println(selectedPin);
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104 | #endif
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105 |
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106 | // set the pin for output
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107 | pinMode(selectedPin, OUTPUT);
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108 |
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109 | // determine digital or analog (PWM)
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110 | if(strncmp(value, "HIGH", 4) == 0 || strncmp(value, "LOW", 3) == 0){
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111 |
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112 | // digital
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113 | #ifdef DEBUG
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114 | Serial.println("digital");
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115 | #endif
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116 |
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117 | if(strncmp(value, "HIGH", 4) == 0){
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118 | #ifdef DEBUG
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119 | Serial.println("HIGH");
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120 | #endif
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121 | digitalWrite(selectedPin, HIGH);
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122 | }
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123 |
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124 | if(strncmp(value, "LOW", 3) == 0){
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125 | #ifdef DEBUG
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126 | Serial.println("LOW");
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127 | #endif
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128 | digitalWrite(selectedPin, LOW);
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129 | }
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130 |
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131 | } else {
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132 |
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133 | // analog
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134 | #ifdef DEBUG
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135 | Serial.println("analog");
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136 | #endif
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137 |
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138 | // get numeric value
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139 | int selectedValue = atoi(value);
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140 | #ifdef DEBUG
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141 | Serial.println(selectedValue);
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142 | #endif
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143 |
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144 | analogWrite(selectedPin, selectedValue);
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145 |
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146 | }
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147 | // return status
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148 | return( http200ok() );
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149 |
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150 | } else {
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151 |
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152 | // read the pin value
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153 | #ifdef DEBUG
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154 | Serial.println("reading pin");
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155 | #endif
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156 |
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157 | // determine analog or digital
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158 | if(pin[0] == 'a' || pin[0] == 'A'){
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159 |
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160 | // analog
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161 | int selectedPin = pin[1] - '0';
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162 |
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163 | #ifdef DEBUG
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164 | Serial.println(selectedPin);
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165 | Serial.println("analog");
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166 | #endif
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167 |
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168 | sprintf(outValue,"%d",analogRead(selectedPin));
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169 |
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170 | #ifdef DEBUG
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171 | Serial.println(outValue);
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172 | #endif
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173 |
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174 | } else if(pin[0] != NULL) {
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175 |
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176 | // digital
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177 | int selectedPin = pin[0] - '0';
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178 |
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179 | #ifdef DEBUG
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180 | Serial.println(selectedPin);
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181 | Serial.println("digital");
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182 | #endif
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183 |
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184 | pinMode(selectedPin, INPUT);
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185 |
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186 | int inValue = digitalRead(selectedPin);
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187 |
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188 | if(inValue == 0){
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189 | sprintf(outValue,"%s","LOW");
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190 | //sprintf(outValue,"%d",digitalRead(selectedPin));
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191 | }
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192 |
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193 | if(inValue == 1){
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194 | sprintf(outValue,"%s","HIGH");
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195 | }
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196 |
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197 | #ifdef DEBUG
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198 | Serial.println(outValue);
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199 | #endif
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200 | }
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201 |
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202 | // assemble the json output
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203 | sprintf( jsonOut, "%s", outValue );
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204 | #ifdef DEBUG
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205 | Serial.println( jsonOut );
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206 | #endif
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207 | // return value
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208 | plen=http200ok();
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209 | plen=es.ES_fill_tcp_data(buf,plen,jsonOut);
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210 | return(plen);
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211 | }
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212 | } else {
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213 |
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214 | // error
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215 | #ifdef DEBUG
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216 | Serial.println("erroring");
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217 | #endif
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218 | plen = http404();
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219 | }
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220 |
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221 | return plen;
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222 | }
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223 |
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224 |
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225 |
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226 | void setup(){
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227 | // Init SPI
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228 | es.ES_enc28j60SpiInit();
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229 |
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230 | // initialize enc28j60
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231 | es.ES_enc28j60Init(mymac); //, 8);
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232 |
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233 | //init the ethernet/ip layer:
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234 | es.ES_init_ip_arp_udp_tcp(mymac,myip,80);
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235 |
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236 | #ifdef DEBUG
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237 | Serial.begin(19200);
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238 | Serial.println("ENC28J60 RESTduino");
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239 |
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240 | Serial.print( "ENC28J60 version " );
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241 | Serial.println( es.ES_enc28j60Revision(), HEX);
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242 | if( es.ES_enc28j60Revision() <= 0 )
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243 | Serial.println( "Failed to access ENC28J60");
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244 | #endif
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245 |
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246 | #ifdef DEBUG
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247 | Serial.println("Ready");
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248 | #endif
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249 |
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250 | }
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251 |
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252 | void loop(){
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253 | uint16_t plen, dat_p;
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254 | int8_t cmd;
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255 |
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256 | while(1) {
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257 | // read packet, handle ping and wait for a tcp packet:
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258 | dat_p=es.ES_packetloop_icmp_tcp(buf,es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf));
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259 |
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260 | /* dat_p will be unequal to zero if there is a valid http get */
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261 | if(dat_p==0){
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262 | // no http request
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263 | continue;
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264 | }
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265 |
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266 | // tcp port 80 begin
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267 | if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){
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268 | // head, post and other methods:
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269 | dat_p = print_webpage(buf);
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270 | goto SENDTCP;
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271 | }
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272 |
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273 | // just one web page in the "root directory" of the web server
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274 | if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
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275 | #ifdef DEBUG
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276 | Serial.println("GET / request");
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277 | #endif
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278 | dat_p=print_webpage(buf);
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279 | goto SENDTCP;
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280 | }
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281 | dat_p = process_request((char *)&(buf[dat_p+4]));
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282 |
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283 | SENDTCP:
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284 |
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285 | es.ES_www_server_reply(buf,dat_p); // send web page data
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286 | // tcp port 80 end
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287 | }
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288 |
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289 | }
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