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.
main.cpp
- Committer:
- star297
- Date:
- 2020-04-21
- Revision:
- 7:26dab90b464f
- Parent:
- 6:9f3f0db71230
File content as of revision 7:26dab90b464f:
#include "mbed.h"
// LPC1768 ESP8266 works up to 460800 baud
//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
Serial esp2(p13,p14);//TX,RX TO BE CONNECTED TO ESP
int espbaud = 115200;
DigitalOut espreset(p25,1);
//Connections to relay
//relay works at logic LOW
DigitalOut digital_out_1(LED1,1);// High on initialization
DigitalOut digital_out_2(LED2,1);// High on initialization
DigitalOut digital_out_3(LED3,1);// High on initialization
DigitalOut digital_out_4(LED4,1);// High on initialization
//digital inputs, connected to push buttons
DigitalIn digital_in_1(p21);
DigitalIn digital_in_2(p22);
DigitalIn digital_in_3(p23);
DigitalIn digital_in_4(p24);
//Analog output
PwmOut analog_out_1(p26);
//Analog Input
AnalogIn tempSensor(p20);
//F401 ESP8266 works up to 460800 baud
/*
//Serial ports to be used
Serial pc(USBTX,USBRX);//TO BE used for debug info
Serial esp(D8,D2);//TX,RX TO BE CONNECTED TO ESP
Serial esp2(D8,D2);//TX,RX TO BE CONNECTED TO ESP
int espbaud = 115200;
//Connections to relay
//relay works at logic LOW
DigitalOut digital_out_1(D3,1);// High on initialization
DigitalOut digital_out_2(D4,1);// High on initialization
DigitalOut digital_out_3(D5,1);// High on initialization
DigitalOut digital_out_4(D6,1);// High on initialization
//digital inputs, connected to push buttons
DigitalIn digital_in_1(A1);
DigitalIn digital_in_2(A2);
DigitalIn digital_in_3(A3);
DigitalIn digital_in_4(A4);
//Analog output
PwmOut analog_out_1(D15);
//Analog Input
AnalogIn tempSensor(A0);
*/
char ssid[32] = "ssid"; // enter your router ssid inside the quotes
char pwd[32] = "password"; // enter your router password inside the quotes
#define BUFFER_SIZE 3000
#define REQ_LINE_BUFF_SIZE 100
#define UNKNOWN 0
#define OK 1
#define ERROR 2
#define FAIL 3
#define READY 4
#define READY_TO_WRITE_TCP 5
const char get_analog_outputs_status[]="/analog_outputs";
const char get_Toggle_Output[]="/digital_outputs/toggle";
const char get_analog_inputs_status[]="/analog_inputs";
const char get_analog_output_update[]="/analog_outputs/update";
const char get_digital_output_status[]="/digital_outputs";
const char get_digital_inputs_html[]="/dinputs.html";
const char get_digital_input_status[]="/digital_inputs";
const char get_index_html[]="/index.html";
const char get_analog_outputs[]="/anoutputs.html";
const char get_analog_inputs_html[]="/aninputs.html";
const char jsonHeader[]="HTTP/1.1 200 OK\n"
"Content-type: application/json\r\n\r\n";
const char textPlainHeader[]="HTTP/1.1 200 OK\n"
"Content-type: text/plain\r\n\r\n";
const char index_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>$(document).ready(function(){setInterval(\"get_digital_output_status()\",2000)});function get_digital_output_status(){var a=\"/digital_outputs\";$.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\"){$(\"#\"+a).html(\"LOW\")}else{alert(\"failed to toggle digital output\")}}},timeout:2000})};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a class=active href=index.html>Digital Outputs</a></li>\n<li><a href=dinputs.html>Digital inputs</a></li>\n<li><a href=anoutputs.html>Analog Outputs</a></li>\n<li><a href=aninputs.html>Analog Inputs</a></li>\n</ul>\n</nav>\n<section>\n<table>\n<tr>\n<th>Digital Ouput</th>\n<th>Status</th>\n<th>Option</th>\n</tr>\n<tr>\n<td>DOut1</td>\n<td id=dout1>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout1')\">Toggle</button>\n</td>\n</tr>\n<tr>\n<td>DOut2</td>\n<td id=dout2>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout2')\">Toggle</button>\n</tr>\n<tr>\n<td>DOut3</td>\n<td id=dout3>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout3')\">Toggle</button>\n</tr>\n<tr>\n<td>DOut4</td>\n<td id=dout4>waiting..</td>\n<td><button class=button onclick=\"digital_output_toggle('dout4')\">Toggle</button>\n</tr>\n</table>\n</section>\n</body>\n</html>";
const char digitalInputs_html[]="HTTP/1.1 200 OK\n"
"Content-type: text/html\r\n\r\n"
"<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script>$(document).ready(function(){setInterval(\"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{$(\"#din4\").html(\"LOW\")}},timeout:2000})};</script>\n</head>\n<body>\n<header>\n<img src=images/logo.jpg>\n<h1>ESP8266 BASED WEBSERVER</h1>\n</header>\n<nav>\n<ul>\n<li><a href=index.html>Digital Outputs</a></li>\n<li><a class=active href=dinputs.html>Digital inputs</a></li>\n<li><a href=anoutputs.html>Analog Outputs</a></li>\n<li><a href=aninputs.html>Analog Inputs</a></li>\n</ul>\n</nav>\n<section>\n<table id=inputsTable>\n<tr>\n<th>Digital Input</th>\n<th>Status</th>\n</tr>\n<tr>\n<td>DIn1</td>\n<td id=din1>waiting..</td>\n</td>\n</tr>\n<tr>\n<td>DIn2</td>\n<td id=din2>waiting..</td>\n</tr>\n<tr>\n<td>DIn3</td>\n<td id=din3>waiting..</td>\n</tr>\n<tr>\n<td>DIn4</td>\n<td id=din4>waiting..</td>\n</tr>\n</table>\n</section>\n</body>\n</html>";
const char analog_outputs_html[]="HTTP/1.1 200 OK\n"
"Content-type: text/html\r\n\r\n"
"<!DOCTYPE html>\n<html>\n<head>\n<title>esp</title>\n<link rel=stylesheet type=text/css href=css/style.css>\n<script src=https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js></script>\n<script type=text/javascript src=https://www.gstatic.com/charts/loader.js></script>\n<script>$(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\",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"
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const char not_found_text[]="HTTP/1.1 404 Not Found\n"
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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,
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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(espbaud);
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,\"%15[^\"]",serverIp);
__enable_irq();
while(readEspResponse()!=OK);
}
if(responseFromEsp==FAIL){
pc.printf("Can't connect to Wifi\n");
while(1);
}
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()*12.0f);
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()*12.0f);
sendRequestedPageToClient(linkId,responsePacket,strlen(responsePacket));
}
else if(strcmp(request,get_analog_inputs_status)==0)
{
char responsePacket[100];
sprintf(responsePacket,"%s%.2f",textPlainHeader,((tempSensor*3.3f)-0.500f)*100.0f);
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
}