Paul Staron / Mbed 2 deprecated ESP8266-WEB-Mbed-Controller

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Show/hide line numbers main.cpp Source File

main.cpp

00001 #include "mbed.h"
00002 
00003 
00004 // LPC1768 ESP8266 works up to 460800 baud
00005 
00006 //Serial ports to be used
00007 Serial pc(USBTX,USBRX);//TO BE used for debug info
00008 Serial esp(p13,p14);//TX,RX TO BE CONNECTED TO ESP
00009 Serial esp2(p13,p14);//TX,RX TO BE CONNECTED TO ESP
00010 int espbaud = 115200;
00011 DigitalOut espreset(p25,1);
00012 //Connections to relay
00013 //relay works at logic LOW
00014 DigitalOut digital_out_1(LED1,1);// High on initialization
00015 DigitalOut digital_out_2(LED2,1);// High on initialization
00016 DigitalOut digital_out_3(LED3,1);// High on initialization
00017 DigitalOut digital_out_4(LED4,1);// High on initialization
00018 //digital inputs, connected to push buttons
00019 DigitalIn digital_in_1(p21);
00020 DigitalIn digital_in_2(p22);
00021 DigitalIn digital_in_3(p23);
00022 DigitalIn digital_in_4(p24);
00023 //Analog output
00024 PwmOut analog_out_1(p26);
00025 //Analog Input
00026 AnalogIn tempSensor(p20);
00027 
00028 //F401  ESP8266 works up to 460800 baud
00029 /*
00030 //Serial ports to be used
00031 Serial pc(USBTX,USBRX);//TO BE used for debug info
00032 Serial esp(D8,D2);//TX,RX TO BE CONNECTED TO ESP
00033 Serial esp2(D8,D2);//TX,RX TO BE CONNECTED TO ESP
00034 int espbaud = 115200;
00035 //Connections to relay
00036 //relay works at logic LOW
00037 DigitalOut digital_out_1(D3,1);// High on initialization
00038 DigitalOut digital_out_2(D4,1);// High on initialization
00039 DigitalOut digital_out_3(D5,1);// High on initialization
00040 DigitalOut digital_out_4(D6,1);// High on initialization
00041 //digital inputs, connected to push buttons
00042 DigitalIn digital_in_1(A1);
00043 DigitalIn digital_in_2(A2);
00044 DigitalIn digital_in_3(A3);
00045 DigitalIn digital_in_4(A4);
00046 //Analog output
00047 PwmOut analog_out_1(D15);
00048 //Analog Input
00049 AnalogIn tempSensor(A0);
00050 */
00051 
00052 char ssid[32] = "ssid";   // enter your router ssid inside the quotes
00053 char pwd[32] = "password"; // enter your router password inside the quotes
00054 
00055 #define BUFFER_SIZE 3000
00056 #define REQ_LINE_BUFF_SIZE 100
00057 #define UNKNOWN 0
00058 #define OK 1
00059 #define ERROR 2
00060 #define FAIL 3
00061 #define READY 4
00062 #define READY_TO_WRITE_TCP 5
00063 
00064 
00065 const char get_analog_outputs_status[]="/analog_outputs";
00066 const char get_Toggle_Output[]="/digital_outputs/toggle";
00067 const char get_analog_inputs_status[]="/analog_inputs";
00068 const char get_analog_output_update[]="/analog_outputs/update";
00069 const char get_digital_output_status[]="/digital_outputs";
00070 const char get_digital_inputs_html[]="/dinputs.html";
00071 const char get_digital_input_status[]="/digital_inputs";
00072 const char get_index_html[]="/index.html";
00073 const char get_analog_outputs[]="/anoutputs.html";
00074 const char get_analog_inputs_html[]="/aninputs.html";
00075 
00076 
00077 const char jsonHeader[]="HTTP/1.1 200 OK\n"
00078                         "Content-type: application/json\r\n\r\n";
00079 
00080 const char textPlainHeader[]="HTTP/1.1 200 OK\n"
00081                         "Content-type: text/plain\r\n\r\n";
00082 
00083 const char index_html[]="HTTP/1.1 200 OK\n"
00084                         "Content-type: text/html\r\n\r\n"
00085                         "<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script>$(document).ready(function(){setInterval(\"get_digital_output_status()\",2000)});function get_digital_output_status(){var a=\"/digital_outputs\";$.ajax({url:a,dataType:\"json\",success:function(b){if(b.digital_outputs.dout1==1){$(\"#dout1\").html(\"HIGH\")}else{$(\"#dout1\").html(\"LOW\")}if(b.digital_outputs.dout2==1){$(\"#dout2\").html(\"HIGH\")}else{$(\"#dout2\").html(\"LOW\")}if(b.digital_outputs.dout3==1){$(\"#dout3\").html(\"HIGH\")}else{$(\"#dout3\").html(\"LOW\")}if(b.digital_outputs.dout4==1){$(\"#dout4\").html(\"HIGH\")}else{$(\"#dout4\").html(\"LOW\")}},timeout:2000})}function digital_output_toggle(a){var b=\"/digital_outputs/toggle?pin=\"+a;$.ajax({url:b,dataType:\"text\",success:function(c){if(c==\"1\"){$(\"#\"+a).html(\"HIGH\")}else{if(c==\"0\"){$(\"#\"+a).html(\"LOW\")}else{alert(\"failed to toggle digital output\")}}},timeout:2000})};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a class=active href=index.html>Digital Outputs</a></li>\n<li><a href=dinputs.html>Digital inputs</a></li>\n<li><a href=anoutputs.html>Analog Outputs</a></li>\n<li><a href=aninputs.html>Analog Inputs</a></li>\n</ul>\n</nav>\n<section>\n<table>\n<tr>\n<th>Digital Ouput</th>\n<th>Status</th>\n<th>Option</th>\n</tr>\n<tr>\n<td>DOut1</td>\n<td id=dout1>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout1')\">Toggle</button>\n</td>\n</tr>\n<tr>\n<td>DOut2</td>\n<td id=dout2>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout2')\">Toggle</button>\n</tr>\n<tr>\n<td>DOut3</td>\n<td id=dout3>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout3')\">Toggle</button>\n</tr>\n<tr>\n<td>DOut4</td>\n<td id=dout4>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout4')\">Toggle</button>\n</tr>\n</table>\n</section>\n</body>\n</html>";
00086 
00087 const char digitalInputs_html[]="HTTP/1.1 200 OK\n"
00088                         "Content-type: text/html\r\n\r\n"
00089                         "<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script>$(document).ready(function(){setInterval(\"get_digital_input_status()\",2000)});function get_digital_input_status(){var a=\"/digital_inputs\";$.ajax({url:a,dataType:\"json\",success:function(b){if(b.digital_inputs.din1==1){$(\"#din1\").html(\"HIGH\")}else{$(\"#din1\").html(\"LOW\")}if(b.digital_inputs.din2==1){$(\"#din2\").html(\"HIGH\")}else{$(\"#din2\").html(\"LOW\")}if(b.digital_inputs.din3==1){$(\"#din3\").html(\"HIGH\")}else{$(\"#din3\").html(\"LOW\")}if(b.digital_inputs.din4==1){$(\"#din4\").html(\"HIGH\")}else{$(\"#din4\").html(\"LOW\")}},timeout:2000})};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a href=index.html>Digital Outputs</a></li>\n<li><a class=active href=dinputs.html>Digital inputs</a></li>\n<li><a href=anoutputs.html>Analog Outputs</a></li>\n<li><a href=aninputs.html>Analog Inputs</a></li>\n</ul>\n</nav>\n<section>\n<table id=inputsTable>\n<tr>\n<th>Digital Input</th>\n<th>Status</th>\n</tr>\n<tr>\n<td>DIn1</td>\n<td id=din1>waiting..</td>\n</td>\n</tr>\n<tr>\n<td>DIn2</td>\n<td id=din2>waiting..</td>\n</tr>\n<tr>\n<td>DIn3</td>\n<td id=din3>waiting..</td>\n</tr>\n<tr>\n<td>DIn4</td>\n<td id=din4>waiting..</td>\n</tr>\n</table>\n</section>\n</body>\n</html>";
00090 
00091 const char analog_outputs_html[]="HTTP/1.1 200 OK\n"
00092                         "Content-type: text/html\r\n\r\n"
00093                         "<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script type=text/javascript src=https://www.gstatic.com/charts/loader.js></script>\n<script>$(document).ready(function(){setInterval(\"getAnalogOutputStatus()\",2000);displayVoltageLevel()});var voltage_level=0;function getAnalogOutputStatus(){var a=\"/analog_outputs\";$.ajax({url:a,dataType:\"text\",success:function(b){voltage_level=parseFloat(b)},timeout:2000})}function setNewVoltageLevel(a){var b=\"/analog_outputs/update?value=\"+a;$.ajax({url:b,dataType:\"text\",success:function(c){voltage_level=parseFloat(c)},timeout:2000})}function displayVoltageLevel(){google.charts.load(\"current\",{packages:[\"gauge\"]});google.charts.setOnLoadCallback(a);function a(){var d=google.visualization.arrayToDataTable([[\"Label\",\"Value\"],[\"Volts\",0],]);var b={width:300,height:250,redFrom:8,redTo:12,yellowFrom:4,yellowTo:8,greenFrom:0,greenTo:4,min:0,max:12,minorTicks:5};var c=new google.visualization.Gauge(document.getElementById(\"chart_div\"));c.draw(d,b);setInterval(function(){d.setValue(0,1,voltage_level);c.draw(d,b)},500)}};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a href=index.html>Digital Outputs</a>\n</li>\n<li><a href=dinputs.html>Digital inputs</a>\n</li>\n<li><a class=active href=anoutputs.html>Analog Outputs</a>\n</li>\n<li><a href=aninputs.html>Analog Inputs</a>\n</li>\n</ul>\n</nav>\n<section>\n<h3>Enter new voltage value and press Update btton</h3>\n<input type=text id=volts maxlength=5 placeholder=Voltage..(0.00-12.00)>\n<button class=button onclick=\"setNewVoltageLevel(document.getElementById('volts').value)\">Update</button>\n<div id=chart_div style=width:300px;height:250px></div>\n<h1 style=color:blue;margin-left:50px>Voltage Level</h1>\n</section>\n</body>\n</html>";
00094 
00095 const char analog_inputs_html[]="HTTP/1.1 200 OK\n"
00096                         "Content-type: text/html\r\n\r\n"
00097                         "<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script>$(document).ready(function(){setInterval(\"getTemperature()\",2000)});function getTemperature(){var a=\"/analog_inputs\";$.ajax({url:a,dataType:\"text\",success:function(b){$(\"#temp\").html(b+\"&#8451;\")},timeout:2000})};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a href=index.html>Digital Outputs</a>\n</li>\n<li><a href=dinputs.html>Digital inputs</a>\n</li>\n<li><a href=anoutputs.html>Analog Outputs</a>\n</li>\n<li><a class=active href=aninputs.html>Analog Inputs</a>\n</li>\n</ul>\n</nav>\n<section>\n<h1 id=temp style=border-style:solid;border-width:6px;border-color:red;border-radius:20px;background-color:#aeb5b7;width:100px;margin-top:20px;margin-left:40px;padding:20px>Waiting..</h1>\n<h2 style=margin-left:25px;color:blue>Temperature Value</h2>\n<br><br><h2>Temperature history</h2>\n<iframe width=450 height=260 style=\"border:1px solid #ccc\" src=\"https://thingspeak.com/channels/243141/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=100&type=line\"></iframe>\n</section>\n</body>\n</html>";
00098 
00099 const char style_css[]="HTTP/1.1 200 OK\n"
00100                         "Content-type: text/css\r\n\r\n"
00101                         "*{padding:0;margin:0}header{background-color:#27ace5}body{font-family:calibri}header h1{text-align:center;font-size:4em;color:#fff;padding:10px}header img{width:110px;margin-top:10px;float:left}ul{list-style-type:none;margin:0;padding:0;overflow:hidden;background-color:#333}li{float:left}li a{display:block;color:#fff;text-align:center;padding:14px 16px;text-decoration:none}li a:hover:not(.active){background-color:#111}.active{background-color:#4CAF50}table{border-collapse:collapse;width:100%}table#inputsTable{border-collapse:collapse;width:70%}th,td{text-align:left;padding:8px}tr:nth-child(even){background-color:#f2f2f2}th{background-color:#4CAF50;color:#fff}section{width:60%;margin:10px}.button{display:inline-block;padding:10px 15px;font-size:15px;cursor:pointer;text-align:center;text-decoration:none;outline:none;color:#fff;background-color:#4CAF50;border:none;border-radius:15px;box-shadow:0 9px #999}.button:hover{background-color:#3e8e41}.button:active{background-color:#3e8e41;box-shadow:0 5px #666;transform:translateY(4px)}input[type=text],select{width:25%;padding:12px 20px;margin:8px 0;display:inline-block;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}";
00102 
00103 const char not_found_text[]="HTTP/1.1 404 Not Found\n"
00104                             "Content-type: text/plain\r\n\r\n"
00105                             "page not found";
00106 
00107 //HTTP/1.1 200 OK
00108 //Content-type:image/jpeg
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00111 
00112 // HTTP/1.1 200 OK
00113 //Content-type:image/x-icon
00114 const char favicon_ico[]={0x48, 0x54, 0x54, 0x50, 0x2F, 0x31, 0x2E, 0x31, 0x20, 0x32, 0x30, 0x30, 0x20, 0x4F, 0x4B, 0x0A, 0x43, 0x6F, 0x6E, 0x74, 0x65, 0x6E, 0x74, 0x2D, 0x74, 0x79, 0x70, 0x65, 0x3A, 0x20, 0x69, 0x6D, 0x61, 0x67, 0x65, 0x2F, 0x78, 0x2D, 0x69, 0x63, 0x6F, 0x6E,0x0D, 0x0A,0x0D, 0x0A, 
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00116 
00117 char rxBuff[BUFFER_SIZE];//array to store data received from esp
00118 char reqLineBuff[REQ_LINE_BUFF_SIZE];
00119 unsigned char reqLinBuffIndex=0;
00120 unsigned int bufferWritingIndex=0;//write pointer
00121 unsigned int bufferReadingIndex_IpdSearch=0;//read pointer
00122 unsigned int bufferReadingIndex_espRespSearch=0;//read pointer
00123 char serverIp[16];
00124 
00125 Timer t;
00126 
00127 void espRxInterrupt();
00128 char readEspResponse();
00129 void handleHttpRequests();
00130 void processReqLine(char *stringToProcess);
00131 void sendMemArrayToEsp(const char*str,unsigned int len);
00132 void sendRequestedPageToClient(char id, const char* page,unsigned int len);
00133 void extractQueryFieldValue(char* someUrl,char* field, char* value);
00134 char toggleOutput(char* pinName);
00135 
00136 int main(){
00137     //configure Pull down on all digital inputs
00138     digital_in_1.mode(PullDown);
00139     digital_in_2.mode(PullDown);
00140     digital_in_3.mode(PullDown);
00141     digital_in_4.mode(PullDown);
00142 
00143     //configure baud rate for UART
00144     pc.baud(115200);
00145     esp.baud(espbaud);
00146 
00147     esp2.attach(&espRxInterrupt,Serial::RxIrq);
00148     
00149     pc.printf("\033[0m\033[2J\033[HInitialise!\r\n\n\n");
00150 
00151     esp.printf("AT+RST\r\n");
00152     while(readEspResponse()!=READY);
00153     pc.printf("Reset success\n");    
00154     esp.printf("ATE0\r\n");//disable ECHO
00155     while(readEspResponse()!=OK);
00156     esp.printf("AT+CWMODE=1\r\n");//enable station mode
00157     while(readEspResponse()!=OK);
00158     esp.printf("AT+CIPMUX=1\r\n");// enable multiple connections
00159     while(readEspResponse()!=OK);
00160     esp.printf("AT+CIPSERVER=1,80\r\n");//start server at port 80
00161     while(readEspResponse()!=OK);    
00162     esp.printf("AT+CIPSTO=5\r\n");//Server timeout=5 seconds
00163     while(readEspResponse()!=OK);    
00164 
00165     pc.printf("Connecting to WiFi..");    
00166     char cmdbuff[60];
00167     strcpy(cmdbuff, "AT+CWJAP_CUR=\"");
00168     strcat(cmdbuff, ssid);
00169     strcat(cmdbuff, "\",\"");
00170     strcat(cmdbuff, pwd);
00171     strcat(cmdbuff, "\"\r\n");    
00172     esp.printf(cmdbuff);
00173     char responseFromEsp;
00174     
00175     while(1)
00176     {
00177         responseFromEsp=readEspResponse();
00178         wait_us(100000);
00179         pc.putc('.');
00180         if(responseFromEsp==OK || responseFromEsp==FAIL)
00181             break;
00182     }
00183     pc.putc('\n');
00184     if(responseFromEsp==OK)
00185     {
00186         pc.printf("Connected to Wifi\n");
00187         __disable_irq();
00188         esp.printf("AT+CIFSR\r\n");//check obtained IP
00189         esp.scanf("+CIFSR:STAIP,\"%15[^\"]",serverIp);
00190         __enable_irq();
00191         while(readEspResponse()!=OK);       
00192     }
00193      if(responseFromEsp==FAIL){
00194          pc.printf("Can't connect to Wifi\n");
00195          while(1);
00196          }
00197     
00198     pc.printf("Server IP is %s\n",serverIp);
00199         
00200     t.start();//start timer
00201     while(1){           
00202         handleHttpRequests();
00203     }
00204 }
00205 
00206 void espRxInterrupt(){
00207     if(esp2.readable())
00208     {
00209         rxBuff[bufferWritingIndex++]=esp2.getc();
00210         if(bufferWritingIndex>=BUFFER_SIZE)
00211             bufferWritingIndex=0;
00212     }
00213 }
00214 
00215 char readEspResponse(){
00216     char rxByte;
00217     char espResponse=UNKNOWN;
00218     static char state=0;
00219 
00220     while(bufferReadingIndex_espRespSearch!=bufferWritingIndex)
00221     {
00222         rxByte=rxBuff[bufferReadingIndex_espRespSearch++];
00223         //pc.putc(rxByte);
00224         if(bufferReadingIndex_espRespSearch>=BUFFER_SIZE)
00225             bufferReadingIndex_espRespSearch=0;
00226 
00227         switch(state)
00228         {
00229             case 0:
00230             if(rxByte=='O')//it may be OK response
00231                 state=1;
00232             else if(rxByte=='E')//it may be ERROR response
00233                 state=4;
00234             else if(rxByte=='F')//it may be FAIL response
00235                 state=10;
00236             else if(rxByte=='r')//it may be 'ready' response
00237                 state=15;
00238             else if(rxByte=='>')//it may be Ready To Write TCP '>' response
00239                 state=21;
00240             break;
00241 
00242             case 1:
00243             if(rxByte=='K')
00244                 state=2;
00245             else state=0;
00246             break;
00247 
00248             case 2:
00249             if(rxByte==0x0d)
00250                 state=3;
00251             else state=0;
00252             break;
00253 
00254             case 3:
00255             if(rxByte==0x0A)
00256                 espResponse=OK;
00257             state=0;
00258             break;
00259 
00260             case 4://ERROR
00261             if(rxByte=='R')
00262                 state=5;
00263             else state=0;
00264             break;
00265 
00266             case 5:
00267             if(rxByte=='R')
00268                 state=6;
00269             else state=0;
00270             break;
00271 
00272             case 6:
00273             if(rxByte=='O')
00274                 state=7;
00275             else state=0;
00276             break;
00277 
00278 
00279             case 7:
00280             if(rxByte=='R')
00281                 state=8;
00282             else state=0;
00283             break;
00284 
00285             case 8:
00286             if(rxByte==0x0d)
00287                 state=9;
00288             else state=0;
00289             break;
00290 
00291             case 9:
00292             if(rxByte==0x0A)
00293                 espResponse=ERROR;
00294             state=0;
00295             break;
00296 
00297 
00298             case 10://fail
00299             if(rxByte=='A')
00300                 state=11;
00301             else state=0;
00302             break;
00303 
00304 
00305             case 11:
00306             if(rxByte=='I')
00307                 state=12;
00308             else state=0;
00309             break;
00310 
00311 
00312             case 12:
00313             if(rxByte=='L')
00314                 state=13;
00315             else state=0;
00316             
00317             break;
00318 
00319             case 13:
00320             if(rxByte==0x0d)
00321                 state=14;
00322             else state=0;
00323             break;
00324 
00325             case 14:
00326             if(rxByte==0x0A)
00327                 espResponse=FAIL;
00328             state=0;
00329             break;
00330 
00331 
00332             case 15://READY
00333             if(rxByte=='e')
00334                 state=16;
00335             else state=0;
00336             break;
00337 
00338 
00339             case 16:
00340             if(rxByte=='a')
00341                 state=17;
00342             else state=0;
00343             break;
00344 
00345             case 17:
00346             if(rxByte=='d')
00347                 state=18;
00348             else state=0;
00349             break;
00350 
00351             case 18:
00352             if(rxByte=='y')
00353                 state=19;
00354             else  state=0;
00355             break;
00356 
00357             case 19:
00358             if(rxByte==0x0d)
00359                 state=20;
00360             else state=0;
00361             break;
00362 
00363             case 20:
00364             if(rxByte==0x0A)
00365                 espResponse=READY;
00366             state=0;
00367             break;         
00368 
00369             case 21:
00370             if(rxByte==0x20)
00371                 espResponse=READY_TO_WRITE_TCP;
00372             state=0;
00373 
00374             default:
00375             state=0;
00376             break;
00377         }
00378     }
00379     return espResponse;
00380 }
00381 
00382 
00383 
00384 void handleHttpRequests(){
00385     char rxByte;    
00386     static char state=0;
00387 
00388     while(bufferReadingIndex_IpdSearch!=bufferWritingIndex)
00389     {
00390         rxByte=rxBuff[bufferReadingIndex_IpdSearch++];
00391         //pc.putc(rxByte);
00392         if(bufferReadingIndex_IpdSearch>=BUFFER_SIZE)
00393             bufferReadingIndex_IpdSearch=0;
00394         switch(state)
00395         {
00396             case 0:
00397             if(rxByte=='+')
00398                 state=1;
00399             break;
00400 
00401             case 1:
00402             if(rxByte=='I')
00403                 state=2;
00404             else state=0;
00405             break;
00406 
00407             case 2:
00408             if(rxByte=='P')
00409                 state=3;
00410             else state=0;
00411             break;
00412 
00413             case 3:
00414             if(rxByte=='D')
00415                 state=4;
00416             else state=0;
00417             break;
00418 
00419             case 4:
00420             if(rxByte==',')
00421                 state=5;
00422             else state=0;
00423             break;
00424 
00425             case 5:
00426             if(rxByte!=0x0d)
00427             {
00428                 reqLineBuff[reqLinBuffIndex++]=rxByte;
00429             }
00430             else
00431             {
00432                 reqLineBuff[reqLinBuffIndex]=0x00;
00433                 bufferReadingIndex_espRespSearch=bufferReadingIndex_IpdSearch;
00434                 processReqLine(reqLineBuff);
00435                 state=0;
00436                 reqLinBuffIndex=0;
00437             }
00438         }
00439     }
00440 }
00441 
00442 void processReqLine(char *stringToProcess)
00443 {
00444 //0,416:GET /?led=ON HTTP/1.1
00445     char requestType[6];
00446     char request[50];
00447     char linkId;
00448     int ipdLen;
00449     sscanf(stringToProcess,"%c,%d:%s %s",&linkId,&ipdLen,requestType,request);
00450     pc.printf("%s\n",request);
00451     if(request!=NULL)
00452     {
00453         if(strcmp(request,"/")==0 || strcmp(request,get_index_html)==0)
00454         {
00455             //send index.html
00456             sendRequestedPageToClient(linkId,index_html,sizeof(index_html)-1);
00457         }
00458         else if(strcmp(request,get_digital_inputs_html)==0)
00459         {
00460             sendRequestedPageToClient(linkId,digitalInputs_html,sizeof(digitalInputs_html)-1);
00461         }
00462         else if(strcmp(request,get_analog_inputs_html)==0)
00463         {
00464             sendRequestedPageToClient(linkId,analog_inputs_html,sizeof(analog_inputs_html)-1);
00465 
00466         }
00467         else if(strcmp(request,get_analog_outputs)==0)
00468         {
00469             sendRequestedPageToClient(linkId,analog_outputs_html,sizeof(analog_outputs_html)-1);
00470         }
00471 
00472         else if(strcmp(request,"/images/logo.jpg")==0)
00473         {
00474             sendRequestedPageToClient(linkId,logo_jpg,sizeof(logo_jpg));
00475         }
00476         else if(strcmp(request,"/favicon.ico")==0)
00477         {
00478             sendRequestedPageToClient(linkId,favicon_ico,sizeof(favicon_ico));
00479         }
00480         else if(strcmp(request,"/css/style.css")==0)
00481         {
00482             sendRequestedPageToClient(linkId,style_css,sizeof(style_css)-1);
00483         }
00484         else if(strncmp(request,get_Toggle_Output,strlen(get_Toggle_Output))==0)
00485         {
00486             //check query field and value, and toggle appropriate Output
00487             char field[10],value[10];
00488             extractQueryFieldValue(request,field,value);
00489             if(value!=NULL)
00490             {
00491                 char newPinState=toggleOutput(value);
00492                 char responsePacket[100];
00493                 sprintf(responsePacket,"%s%c",textPlainHeader,newPinState+48);
00494                 sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00495             }
00496         }
00497         else if(strcmp(request,get_digital_output_status)==0)
00498         {
00499             //"{\"digital_outputs\":{\"dout1\":1,\"dout2\":0,\"dout3\":1,\"dout4\":1}}"
00500             char responsePacket[200];
00501             sprintf(responsePacket,"%s{\"digital_outputs\":{\"dout1\":%c,\
00502                             \"dout2\":%c,\"dout3\":%c,\"dout4\":%c}}",jsonHeader,(!digital_out_1)+48,
00503                             (!digital_out_2)+48,(!digital_out_3)+48,(!digital_out_4)+48);
00504             sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00505         }
00506         else if(strcmp(request,get_digital_input_status)==0)
00507         {
00508             char responsePacket[200];
00509             sprintf(responsePacket,"%s{\"digital_inputs\":{\"din1\":%c,\
00510                             \"din2\":%c,\"din3\":%c,\"din4\":%c}}",jsonHeader,(digital_in_1)+48,
00511                             (digital_in_2)+48,(digital_in_3)+48,(digital_in_4)+48);
00512             sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00513 
00514         }
00515         else if(strncmp(request,get_analog_output_update,strlen(get_analog_output_update))==0)
00516         {
00517             char field[10],value[10];
00518             extractQueryFieldValue(request,field,value);
00519             if(value!=NULL)
00520             {
00521                 analog_out_1=atof(value)/12.0;
00522                 char responsePacket[100];
00523                 sprintf(responsePacket,"%s%.2f",textPlainHeader,analog_out_1.read()*12.0f);
00524                 sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00525             }
00526         }
00527         else if(strcmp(request,get_analog_outputs_status)==0)
00528         {           
00529             char responsePacket[100];
00530             sprintf(responsePacket,"%s%.2f",textPlainHeader,analog_out_1.read()*12.0f);
00531             sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00532         }
00533         else if(strcmp(request,get_analog_inputs_status)==0)
00534         {
00535             char responsePacket[100];           
00536             sprintf(responsePacket,"%s%.2f",textPlainHeader,((tempSensor*3.3f)-0.500f)*100.0f);
00537             sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
00538         }
00539         else 
00540         {
00541             sendRequestedPageToClient(linkId,not_found_text,sizeof(not_found_text)-1);
00542             //send page not found message
00543         }
00544     }
00545 }
00546 
00547 
00548 void sendRequestedPageToClient(char id, const char* page,unsigned int len)
00549 {
00550     char atCommandArray[50];
00551     unsigned int lenOfPacketToTx;
00552     unsigned int pageToSendAddress=0;
00553     char tempEspStatus;
00554     while(len>0)
00555     {
00556         if(len>2048){
00557             len-=2048;        
00558             lenOfPacketToTx=2048;
00559         }
00560         else{
00561             lenOfPacketToTx=len;
00562             len=0;
00563         }
00564         
00565         sprintf(atCommandArray,"AT+CIPSEND=%c,%d\r\n",id,lenOfPacketToTx);  
00566         bufferReadingIndex_espRespSearch=bufferWritingIndex;
00567         esp.printf(atCommandArray);
00568      
00569         while(1)
00570         {
00571             tempEspStatus=readEspResponse();  
00572             if(tempEspStatus==READY_TO_WRITE_TCP||tempEspStatus==ERROR ||tempEspStatus==FAIL)
00573                 break;
00574         }    
00575         //now send page
00576         if(tempEspStatus==READY_TO_WRITE_TCP)
00577         {
00578             sendMemArrayToEsp(page+pageToSendAddress,lenOfPacketToTx);
00579             do{
00580                 tempEspStatus=readEspResponse();
00581             }
00582             while(tempEspStatus==UNKNOWN);
00583             if(tempEspStatus!=OK)//link broken, don't send more data to this link.
00584                 break;
00585 
00586             pageToSendAddress+=lenOfPacketToTx;
00587         }
00588         else
00589             break;
00590     }
00591     if(tempEspStatus==OK)
00592     {
00593         sprintf(atCommandArray,"AT+CIPCLOSE=%c\r\n",id);
00594         esp.printf(atCommandArray);
00595         while(readEspResponse()==UNKNOWN);
00596     }
00597 }
00598 
00599 void sendMemArrayToEsp(const char*str,unsigned int len)
00600 {
00601     while(len--)
00602         esp.putc(*str++);
00603 }
00604 
00605 void extractQueryFieldValue(char* someUrl,char* field, char* value)
00606 {   
00607     sscanf(someUrl,"%*[^?]%*c%[^=]%*c%s",field,value);
00608 }
00609 
00610 char toggleOutput(char* pinName)
00611 {
00612     if(strcmp(pinName,"dout1")==0)
00613     {
00614         digital_out_1=!digital_out_1;
00615         return !digital_out_1;
00616     }
00617     else if(strcmp(pinName,"dout2")==0)
00618     {
00619         digital_out_2=!digital_out_2;
00620         return !digital_out_2;
00621     }
00622     else if(strcmp(pinName,"dout3")==0)
00623     {
00624         digital_out_3=!digital_out_3;
00625         return !digital_out_3;
00626     }
00627     else if(strcmp(pinName,"dout4")==0)
00628     {
00629         digital_out_4=!digital_out_4;
00630         return !digital_out_4;
00631     }
00632     else return 2;//error
00633 
00634 }
00635  
00636
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