Paul Staron
Fork of Farrukh's webserver. Tested on LPC1768 and STM32f401 but should work on almost any platform.
New version that has been tested on LPC1768 and STM32F401 Based on Farrukh's idea here: https://os.mbed.com/users/programmer5/code/STM32-ESP8266-WEBSERVER/
Enter your Wi-Fi SSID and PASSWORD and edit the espbaud to suit your ESP8266, Works fast and stable at 460800.
Use configuration program to reset and set up the ESP8266 if needed:
https://os.mbed.com/users/star297/code/ESP8266-configuaration-baudrate/
Limitations are no HTTPS.
Diff: main.cpp
- Revision:
- 5:efcfa9e61907
- Parent:
- 4:7334688498cc
- Child:
- 6:9f3f0db71230
--- a/main.cpp Mon Apr 20 20:43:33 2020 +0000
+++ b/main.cpp Mon Apr 20 23:10:10 2020 +0000
@@ -1,6 +1,8 @@
#include "mbed.h"
+
// LPC1768
+
//Serial ports to be used
Serial pc(USBTX,USBRX);//TO BE used for debug info
Serial esp(p13,p14);//TX,RX TO BE CONNECTED TO ESP
@@ -87,4 +89,543 @@
const char analog_outputs_html[]="HTTP/1.1 200 OK\n"
"Content-type: text/html\r\n\r\n"
- "<!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;$.ajax({url:b,dataType:\"text\",success:function(c){voltage_level=parseFloat(c)},timeout:2000})}function displayVoltageLevel(){google.charts.load(\"current\",{packages:[\"gauge\"]});google.charts.setOnLoadCallback(a);function a(){var d=google.visualization.arrayToDataTable([[\"Label\",\"Value\"],[\"Volts\"%2
\ No newline at end of file
+ "<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script type=text/javascript src=https://www.gstatic.com/charts/loader.js></script>\n<script>$(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>";
+
+const char analog_inputs_html[]="HTTP/1.1 200 OK\n"
+ "Content-type: text/html\r\n\r\n"
+ "<!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+\"℃\")},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>";
+
+const char style_css[]="HTTP/1.1 200 OK\n"
+ "Content-type: text/css\r\n\r\n"
+ "*{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}";
+
+const char not_found_text[]="HTTP/1.1 404 Not Found\n"
+ "Content-type: text/plain\r\n\r\n"
+ "page not found";
+
+//HTTP/1.1 200 OK
+//Content-type:image/jpeg
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+
+// HTTP/1.1 200 OK
+//Content-type:image/x-icon
+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,
+ 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x10, 0x10, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x68, 0x03, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xED, 0xED, 0xED, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF6, 0xF6, 0xF6, 0xAD, 0xB4, 0xB3, 0xD9, 0xE0, 0xDF, 0xFA, 0xFA, 0xFA, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF5, 0xF5, 0xF5, 0xC8, 0xC8, 0xC8, 0x82, 0x5E, 0x64, 0x79, 0x56, 0x5C, 0xDF, 0xDF, 0xDF, 0xF7, 0xF7, 0xF7, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF7, 0xF7, 0xF7, 0xE4, 0xE4, 0xE4, 0x6F, 0x6F, 0x6F, 0xA6, 0x66, 0x66, 0x7C, 0x3A, 0x37, 0x64, 0x5B, 0x4F, 0xE1, 0xDC, 0xD5, 0xF8, 0xF8, 0xF8, 0xF6, 0xF6, 0xF6, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF9, 0xF9, 0xF9, 0x9B, 0x9B, 0x9B, 0x5B, 0x5B, 0x5B, 0x74, 0x5A, 0x3A, 0x7F, 0x62, 0x3E, 0x7A, 0x5F, 0x3A, 0x8B, 0x7D, 0x6A, 0xBC, 0xBC, 0xBC, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF6, 0xF6, 0xF6, 0x87, 0x86, 0x84, 0x67, 0x64, 0x61, 0x79, 0x5E, 0x41, 0x69, 0x4B, 0x2A, 0x97, 0x7F, 0x5E, 0x50, 0x41, 0x34, 0x2F, 0x2F, 0x2F, 0xBE, 0xBC, 0xBA, 0xF9, 0xF8, 0xF5, 0xF8, 0xF8, 0xF7, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xC6, 0xC6, 0xC6, 0x6C, 0x5B, 0x46, 0x7C, 0x60, 0x3D, 0x8C, 0x62, 0x64, 0x5E, 0x3A, 0x3F, 0x42, 0x42, 0x41, 0x39, 0x39, 0x39, 0x5B, 0x5B, 0x5B, 0x77, 0x61, 0x46, 0xC0, 0xAC, 0x8B, 0xF8, 0xF8, 0xF7, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF4, 0xF4, 0xF4, 0xA3, 0x93, 0x7E, 0x7C, 0x5F, 0x3A, 0x95, 0x6D, 0x6F, 0x5F, 0x3B, 0x41, 0x35, 0x35, 0x35, 0x47, 0x47, 0x47, 0x71, 0x71, 0x71, 0x69, 0x53, 0x37, 0x57, 0x3C, 0x19, 0xA0, 0xA0, 0x9F, 0xF3, 0xF3, 0xF3, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF6, 0xF2, 0xAD, 0xA7, 0x9F, 0x66, 0x3E, 0x44, 0x61, 0x37, 0x3E, 0x5D, 0x3A, 0x3F, 0x60, 0x4D, 0x50, 0xB8, 0xB8, 0xB8, 0x81, 0x42, 0x46, 0x7A, 0x26, 0x2A, 0x89, 0x46, 0x31, 0xD7, 0xB1, 0xA2, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF6, 0xF6, 0xF6, 0xD2, 0xB6, 0xBD, 0x7A, 0x4E, 0x55, 0x7C, 0x50, 0x57, 0x7F, 0x67, 0x6B, 0x7B, 0x7B, 0x7B, 0x82, 0x6C, 0x6F, 0x7B, 0x5D, 0x5F, 0x85, 0x75, 0x4F, 0xE6, 0xDC, 0xC5, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFC, 0xF6, 0xF9, 0xD2, 0xC1, 0xC4, 0x8C, 0x77, 0x7A, 0x83, 0x78, 0x7A, 0x68, 0x68, 0x68, 0x94, 0x9A, 0x99, 0x8A, 0x92, 0x90, 0xBB, 0xC8, 0xB4, 0xF2, 0xF9, 0xEE, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF7, 0xF7, 0xF7, 0xCC, 0xCC, 0xCC, 0x70, 0x70, 0x70, 0x9C, 0x9C, 0x9C, 0x9A, 0x9A, 0x9A, 0xAA, 0xAA, 0xAA, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xDC, 0xDC, 0xDC, 0x79, 0x79, 0x79, 0xA8, 0xA8, 0xA8, 0xEE, 0xEE, 0xEE, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xEA, 0xEA, 0xEA, 0xEB, 0xEB, 0xEB, 0xF7, 0xF7, 0xF7, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+char rxBuff[BUFFER_SIZE];//array to store data received from esp
+char reqLineBuff[REQ_LINE_BUFF_SIZE];
+unsigned char reqLinBuffIndex=0;
+unsigned int bufferWritingIndex=0;//write pointer
+unsigned int bufferReadingIndex_IpdSearch=0;//read pointer
+unsigned int bufferReadingIndex_espRespSearch=0;//read pointer
+char serverIp[16];
+
+Timer t;
+
+void espRxInterrupt();
+char readEspResponse();
+void handleHttpRequests();
+void processReqLine(char *stringToProcess);
+void sendMemArrayToEsp(const char*str,unsigned int len);
+void sendRequestedPageToClient(char id, const char* page,unsigned int len);
+void extractQueryFieldValue(char* someUrl,char* field, char* value);
+char toggleOutput(char* pinName);
+
+int main(){
+ //configure Pull down on all digital inputs
+ digital_in_1.mode(PullDown);
+ digital_in_2.mode(PullDown);
+ digital_in_3.mode(PullDown);
+ digital_in_4.mode(PullDown);
+
+ //configure baud rate for UART
+ pc.baud(115200);
+ esp.baud(115200);
+
+ esp2.attach(&espRxInterrupt,Serial::RxIrq);
+
+ pc.printf("\033[0m\033[2J\033[HInitialise!\r\n\n\n");
+
+ esp.printf("AT+RST\r\n");
+ while(readEspResponse()!=READY);
+ pc.printf("Reset success\n");
+ esp.printf("ATE0\r\n");//disable ECHO
+ while(readEspResponse()!=OK);
+ esp.printf("AT+CWMODE=1\r\n");//enable station mode
+ while(readEspResponse()!=OK);
+ esp.printf("AT+CIPMUX=1\r\n");// enable multiple connections
+ while(readEspResponse()!=OK);
+ esp.printf("AT+CIPSERVER=1,80\r\n");//start server at port 80
+ while(readEspResponse()!=OK);
+ esp.printf("AT+CIPSTO=5\r\n");//Server timeout=5 seconds
+ while(readEspResponse()!=OK);
+
+ pc.printf("Connecting to WiFi..");
+ char cmdbuff[60];
+ strcpy(cmdbuff, "AT+CWJAP_CUR=\"");
+ strcat(cmdbuff, ssid);
+ strcat(cmdbuff, "\",\"");
+ strcat(cmdbuff, pwd);
+ strcat(cmdbuff, "\"\r\n");
+ esp.printf(cmdbuff);
+ char responseFromEsp;
+
+ while(1)
+ {
+ responseFromEsp=readEspResponse();
+ wait_us(100000);
+ pc.putc('.');
+ if(responseFromEsp==OK || responseFromEsp==FAIL)
+ break;
+ }
+ pc.putc('\n');
+ if(responseFromEsp==OK)
+ {
+ pc.printf("Connected to Wifi\n");
+ __disable_irq();
+ esp.printf("AT+CIFSR\r\n");//check obtained IP
+ esp.scanf("+CIFSR:STAIP,\"%[^\"]",&serverIp);
+ __enable_irq();
+ while(readEspResponse()!=OK);
+ }
+
+ pc.printf("Server IP is %s\n",serverIp);
+
+ t.start();//start timer
+ while(1){
+ handleHttpRequests();
+ }
+}
+
+void espRxInterrupt(){
+ if(esp2.readable())
+ {
+ rxBuff[bufferWritingIndex++]=esp2.getc();
+ if(bufferWritingIndex>=BUFFER_SIZE)
+ bufferWritingIndex=0;
+ }
+}
+
+char readEspResponse(){
+ char rxByte;
+ char espResponse=UNKNOWN;
+ static char state=0;
+
+ while(bufferReadingIndex_espRespSearch!=bufferWritingIndex)
+ {
+ rxByte=rxBuff[bufferReadingIndex_espRespSearch++];
+ //pc.putc(rxByte);
+ if(bufferReadingIndex_espRespSearch>=BUFFER_SIZE)
+ bufferReadingIndex_espRespSearch=0;
+
+ switch(state)
+ {
+ case 0:
+ if(rxByte=='O')//it may be OK response
+ state=1;
+ else if(rxByte=='E')//it may be ERROR response
+ state=4;
+ else if(rxByte=='F')//it may be FAIL response
+ state=10;
+ else if(rxByte=='r')//it may be 'ready' response
+ state=15;
+ else if(rxByte=='>')//it may be Ready To Write TCP '>' response
+ state=21;
+ break;
+
+ case 1:
+ if(rxByte=='K')
+ state=2;
+ else state=0;
+ break;
+
+ case 2:
+ if(rxByte==0x0d)
+ state=3;
+ else state=0;
+ break;
+
+ case 3:
+ if(rxByte==0x0A)
+ espResponse=OK;
+ state=0;
+ break;
+
+ case 4://ERROR
+ if(rxByte=='R')
+ state=5;
+ else state=0;
+ break;
+
+ case 5:
+ if(rxByte=='R')
+ state=6;
+ else state=0;
+ break;
+
+ case 6:
+ if(rxByte=='O')
+ state=7;
+ else state=0;
+ break;
+
+
+ case 7:
+ if(rxByte=='R')
+ state=8;
+ else state=0;
+ break;
+
+ case 8:
+ if(rxByte==0x0d)
+ state=9;
+ else state=0;
+ break;
+
+ case 9:
+ if(rxByte==0x0A)
+ espResponse=ERROR;
+ state=0;
+ break;
+
+
+ case 10://fail
+ if(rxByte=='A')
+ state=11;
+ else state=0;
+ break;
+
+
+ case 11:
+ if(rxByte=='I')
+ state=12;
+ else state=0;
+ break;
+
+
+ case 12:
+ if(rxByte=='L')
+ state=13;
+ else state=0;
+
+ break;
+
+ case 13:
+ if(rxByte==0x0d)
+ state=14;
+ else state=0;
+ break;
+
+ case 14:
+ if(rxByte==0x0A)
+ espResponse=FAIL;
+ state=0;
+ break;
+
+
+ case 15://READY
+ if(rxByte=='e')
+ state=16;
+ else state=0;
+ break;
+
+
+ case 16:
+ if(rxByte=='a')
+ state=17;
+ else state=0;
+ break;
+
+ case 17:
+ if(rxByte=='d')
+ state=18;
+ else state=0;
+ break;
+
+ case 18:
+ if(rxByte=='y')
+ state=19;
+ else state=0;
+ break;
+
+ case 19:
+ if(rxByte==0x0d)
+ state=20;
+ else state=0;
+ break;
+
+ case 20:
+ if(rxByte==0x0A)
+ espResponse=READY;
+ state=0;
+ break;
+
+ case 21:
+ if(rxByte==0x20)
+ espResponse=READY_TO_WRITE_TCP;
+ state=0;
+
+ default:
+ state=0;
+ break;
+ }
+ }
+ return espResponse;
+}
+
+
+
+void handleHttpRequests(){
+ char rxByte;
+ static char state=0;
+
+ while(bufferReadingIndex_IpdSearch!=bufferWritingIndex)
+ {
+ rxByte=rxBuff[bufferReadingIndex_IpdSearch++];
+ //pc.putc(rxByte);
+ if(bufferReadingIndex_IpdSearch>=BUFFER_SIZE)
+ bufferReadingIndex_IpdSearch=0;
+ switch(state)
+ {
+ case 0:
+ if(rxByte=='+')
+ state=1;
+ break;
+
+ case 1:
+ if(rxByte=='I')
+ state=2;
+ else state=0;
+ break;
+
+ case 2:
+ if(rxByte=='P')
+ state=3;
+ else state=0;
+ break;
+
+ case 3:
+ if(rxByte=='D')
+ state=4;
+ else state=0;
+ break;
+
+ case 4:
+ if(rxByte==',')
+ state=5;
+ else state=0;
+ break;
+
+ case 5:
+ if(rxByte!=0x0d)
+ {
+ reqLineBuff[reqLinBuffIndex++]=rxByte;
+ }
+ else
+ {
+ reqLineBuff[reqLinBuffIndex]=0x00;
+ bufferReadingIndex_espRespSearch=bufferReadingIndex_IpdSearch;
+ processReqLine(reqLineBuff);
+ state=0;
+ reqLinBuffIndex=0;
+ }
+ }
+ }
+}
+
+void processReqLine(char *stringToProcess)
+{
+//0,416:GET /?led=ON HTTP/1.1
+ char requestType[6];
+ char request[50];
+ char linkId;
+ int ipdLen;
+ sscanf(stringToProcess,"%c,%d:%s %s",&linkId,&ipdLen,requestType,request);
+ pc.printf("%s\n",request);
+ if(request!=NULL)
+ {
+ if(strcmp(request,"/")==0 || strcmp(request,get_index_html)==0)
+ {
+ //send index.html
+ sendRequestedPageToClient(linkId,index_html,sizeof(index_html)-1);
+ }
+ else if(strcmp(request,get_digital_inputs_html)==0)
+ {
+ sendRequestedPageToClient(linkId,digitalInputs_html,sizeof(digitalInputs_html)-1);
+ }
+ else if(strcmp(request,get_analog_inputs_html)==0)
+ {
+ sendRequestedPageToClient(linkId,analog_inputs_html,sizeof(analog_inputs_html)-1);
+
+ }
+ else if(strcmp(request,get_analog_outputs)==0)
+ {
+ sendRequestedPageToClient(linkId,analog_outputs_html,sizeof(analog_outputs_html)-1);
+ }
+
+ else if(strcmp(request,"/images/logo.jpg")==0)
+ {
+ sendRequestedPageToClient(linkId,logo_jpg,sizeof(logo_jpg));
+ }
+ else if(strcmp(request,"/favicon.ico")==0)
+ {
+ sendRequestedPageToClient(linkId,favicon_ico,sizeof(favicon_ico));
+ }
+ else if(strcmp(request,"/css/style.css")==0)
+ {
+ sendRequestedPageToClient(linkId,style_css,sizeof(style_css)-1);
+ }
+ else if(strncmp(request,get_Toggle_Output,strlen(get_Toggle_Output))==0)
+ {
+ //check query field and value, and toggle appropriate Output
+ char field[10],value[10];
+ extractQueryFieldValue(request,field,value);
+ if(value!=NULL)
+ {
+ char newPinState=toggleOutput(value);
+ char responsePacket[100];
+ sprintf(responsePacket,"%s%c",textPlainHeader,newPinState+48);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+ }
+ }
+ else if(strcmp(request,get_digital_output_status)==0)
+ {
+ //"{\"digital_outputs\":{\"dout1\":1,\"dout2\":0,\"dout3\":1,\"dout4\":1}}"
+ char responsePacket[200];
+ sprintf(responsePacket,"%s{\"digital_outputs\":{\"dout1\":%c,\
+ \"dout2\":%c,\"dout3\":%c,\"dout4\":%c}}",jsonHeader,(!digital_out_1)+48,
+ (!digital_out_2)+48,(!digital_out_3)+48,(!digital_out_4)+48);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+ }
+ else if(strcmp(request,get_digital_input_status)==0)
+ {
+ char responsePacket[200];
+ sprintf(responsePacket,"%s{\"digital_inputs\":{\"din1\":%c,\
+ \"din2\":%c,\"din3\":%c,\"din4\":%c}}",jsonHeader,(digital_in_1)+48,
+ (digital_in_2)+48,(digital_in_3)+48,(digital_in_4)+48);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+
+ }
+ else if(strncmp(request,get_analog_output_update,strlen(get_analog_output_update))==0)
+ {
+ char field[10],value[10];
+ extractQueryFieldValue(request,field,value);
+ if(value!=NULL)
+ {
+ analog_out_1=atof(value)/12.0;
+ char responsePacket[100];
+ sprintf(responsePacket,"%s%.2f",textPlainHeader,analog_out_1.read()*12.0);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+ }
+ }
+ else if(strcmp(request,get_analog_outputs_status)==0)
+ {
+ char responsePacket[100];
+ sprintf(responsePacket,"%s%.2f",textPlainHeader,analog_out_1.read()*12.0);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+ }
+ else if(strcmp(request,get_analog_inputs_status)==0)
+ {
+ char responsePacket[100];
+ sprintf(responsePacket,"%s%.2f",textPlainHeader,((tempSensor*3.3)-0.500)*100.0);
+ sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
+ }
+ else
+ {
+ sendRequestedPageToClient(linkId,not_found_text,sizeof(not_found_text)-1);
+ //send page not found message
+ }
+ }
+}
+
+
+void sendRequestedPageToClient(char id, const char* page,unsigned int len)
+{
+ char atCommandArray[50];
+ unsigned int lenOfPacketToTx;
+ unsigned int pageToSendAddress=0;
+ char tempEspStatus;
+ while(len>0)
+ {
+ if(len>2048){
+ len-=2048;
+ lenOfPacketToTx=2048;
+ }
+ else{
+ lenOfPacketToTx=len;
+ len=0;
+ }
+
+ sprintf(atCommandArray,"AT+CIPSEND=%c,%d\r\n",id,lenOfPacketToTx);
+ bufferReadingIndex_espRespSearch=bufferWritingIndex;
+ esp.printf(atCommandArray);
+
+ while(1)
+ {
+ tempEspStatus=readEspResponse();
+ if(tempEspStatus==READY_TO_WRITE_TCP||tempEspStatus==ERROR ||tempEspStatus==FAIL)
+ break;
+ }
+ //now send page
+ if(tempEspStatus==READY_TO_WRITE_TCP)
+ {
+ sendMemArrayToEsp(page+pageToSendAddress,lenOfPacketToTx);
+ do{
+ tempEspStatus=readEspResponse();
+ }
+ while(tempEspStatus==UNKNOWN);
+ if(tempEspStatus!=OK)//link broken, don't send more data to this link.
+ break;
+
+ pageToSendAddress+=lenOfPacketToTx;
+ }
+ else
+ break;
+ }
+ if(tempEspStatus==OK)
+ {
+ sprintf(atCommandArray,"AT+CIPCLOSE=%c\r\n",id);
+ esp.printf(atCommandArray);
+ while(readEspResponse()==UNKNOWN);
+ }
+}
+
+void sendMemArrayToEsp(const char*str,unsigned int len)
+{
+ while(len--)
+ esp.putc(*str++);
+}
+
+void extractQueryFieldValue(char* someUrl,char* field, char* value)
+{
+ sscanf(someUrl,"%*[^?]%*c%[^=]%*c%s",field,value);
+}
+
+char toggleOutput(char* pinName)
+{
+ if(strcmp(pinName,"dout1")==0)
+ {
+ digital_out_1=!digital_out_1;
+ return !digital_out_1;
+ }
+ else if(strcmp(pinName,"dout2")==0)
+ {
+ digital_out_2=!digital_out_2;
+ return !digital_out_2;
+ }
+ else if(strcmp(pinName,"dout3")==0)
+ {
+ digital_out_3=!digital_out_3;
+ return !digital_out_3;
+ }
+ else if(strcmp(pinName,"dout4")==0)
+ {
+ digital_out_4=!digital_out_4;
+ return !digital_out_4;
+ }
+ else return 2;//error
+
+}
+
+
\ No newline at end of file